WB and PB Series Eddy-Current and Magnetic Powder Dynamometers User s Manual
Purchase Record Please record all model numbers and serial numbers of your Magtrol equipment, along with the general purchase information. The model number and serial number can be found on either a silver identification plate or white label affixed to each unit. Refer to these numbers whenever you communicate with a Magtrol representative about this equipment. Model Number: Serial Number: Purchase Date: Purchased From: While every precaution has been exercised in the compilation of this document to ensure the accuracy of its contents, Magtrol assumes no responsibility for errors or omissions. Additionally, no liability is assumed for any damages that may result from the use of the information contained within this publication. Copyright Copyright 2005-2015 Magtrol, Inc. All rights reserved. Copying or reproduction of all or any part of the contents of this manual without the express permission of Magtrol is strictly prohibited. 1st Edition - rev F September 2015
Safety Precautions Warning! In order to minimize risks, it is of utmost importance to respect the current safety standards when planning, configuring and operating the motor test system. 1. Make sure that all Magtrol dynamometers and electronic products are earth-grounded, to ensure personal safety and proper operation. 2. Check line voltage before operating electronic equipment. 3. Make sure that dynamometers and motors under test are equipped with appropriate safety guards. Note: Detailed information regarding Motor Test Protective Systems can be found in Section 2.8 Protective Systems. 4. Always select a coupling that matches the speed and braking torque of the tested system. 5. Wear protective glasses when working on a test bench. 6. Never wear a necktie or baggy clothes when standing close to the test bench. 7. Never stand too close to the running test bench or bend over a rotating shaft. 8. Electrically insulate the motor terminal block. 9. Always connect the motor envelope to earth ground.. Make sure that the safety circuitry of the motor control cannot be deactivated by accident. Warning! A defect on the electrical transmission line can cause a short-circuit which can propagate to all connected instruments or persons in contact with the apparatus. i
Revisions To This Manual The contents of this manual is subject to change without prior notice. Should revisions be necessary, updates to all Magtrol User s Manuals can be found at Magtrol s website at www.magtrol.com/support/manuals.htm. Please compare the date of this manual with the revision date on the web site, then refer to the manual s Table of Revisions for any changes/updates that have been made since this edition. Revision Date 1st edition rev. F - September 2015 Table of revisions Date Edition Change Section(s) 09/02/15 1st Edition - rev F Page layout 3.1 / 3.1.2 04/21/15 1st Edition - rev E Remove WB2.7 HS version 1.2.1 04/21/15 1st Edition - rev E Remove the 1WB2.7 dynamometer 1.2.1 / 2. / 6.1.2 05/26/14 1st Edition - rev D Data sheets updated 1.2 02/26/14 1st Edition - rev C All references to DSP6001 changed to DSP7000 throughout manual 04/25/12 1st Edition - rev B Diagram (torque, power) for Tandem WB 115 updated 1.2.4 12/21/09 1st Edition - rev A The maximum input pressure was changed 3.1.2 ii
Table of Contents 1. Introduction...1 1.1 General Description... 1 1.2 Data sheets... 2 1.2.1 WB/PB 2.7 Series... 2 1.2.2 WB/PB 43 Series... 9 1.2.3 WB/PB 65 Series... 17 1.2.4 WB/PB 115 Series... 25 1.2.5 WB/PB 15 Series... 33 2. Installation / Mounting...41 2.1 Locking the Dynamometer for Transport... 41 2.1.1 WB/PB 2.7 Series... 42 2.1.2 WB/PB 43 Series... 43 2.1.3 WB/PB 65 Series... 44 2.1.4 WB/PB 115 Series... 45 2.1.5 WB/PB 15 Series... 46 2.2 Mounting the dynamometer to the test bench... 47 2.2.1 Aligning the dynamometers on the test bench... 47 2.2.2 Vibrations induced by the test bench... 47 2.3 Couplings... 48 2.4 Measuring range... 49 2.5 Drag torque... 49 2.6 Tolerated radial and axial forces... 49 2.7 Connecting the cooling system... 50 2.8 Protective Systems... 50 2.9 Power/Heat dissipation... 52 2. Torque Speed Power Curves... 52 3. Cooling...58 3.1 Dynamometer Cooling... 58 3.1.1 Connections... 58 3.1.2 Water Flow and Pressure... 58 3.1.3 Cooling Water Consumption... 58 3.1.4 Temperature Sensor... 58 3.2 Open-circuit Cooling Systems... 59 3.2.1 Example... 59 3.3 Closed-circuit Cooling Systems... 60 3.3.1 Example... 60 3.4 cooling Water Issues... 61 3.4.1 Impurities... 61 3.4.2 Hardness... 61 3.4.3 Filtering... 62 3.4.4 Controlling the Water Flow Rate... 62 3.4.5 Water Inhibitors... 62 3.4.6 Condensation... 63 3.5 Cooling circuit Purging... 63 iii
Table of Contents Magtrol WB/PB Dynamometers 4. Connections / Configuration...64 4.1 Connection to Magtrol Motor Testing Electronics... 64 4.1.1 Manual Test Configuration... 64 4.1.2 PC-based Test Configuration... 65 4.2 Tandem Dynamometer Configuration... 66 4.2.1 Electromagnetic Clutch... 66 4.2.2 Transformer Connection... 67 4.3 Connection to non-magtrol electronic control units... 68 4.3.1 Power and Thermostat Connection... 68 4.3.2 Torque Signal Connection... 70 4.3.3 Speed Signal Connection... 71 5. Operating Principles...72 5.1 Eddy-current dynamometers (WB)... 72 5.2 magnetic powder dynamometers (PB)... 72 5.3 WB vs. PB... 72 6. Calibration...73 6.1 Basic Calibration Information... 73 6.1.1 Calibration Arms... 73 6.1.2 Calibration Weight... 74 6.2 Calibration with Magtrol Motor Testing Electronics... 75 6.3 Calibration using Non-Magtrol electronic control units... 75 6.4 Calibration of Overload Protection... 75 6.4.1 WB/PB 43 Series... 76 6.4.2 WB/PB 65 Series... 77 6.4.3 WB/PB 115 Series... 78 7. Maintenance and Repair...79 7.1 Maintenance... 79 7.2 Repair... 79 7.3 Sending Equipment to Magtrol for Maintenance/Repair... 79 Service Information...80 Returning Magtrol equipment for Repair and/or Calibration... 80 Returning Equipment to Magtrol, Inc. (United States)... 80 Returning Equipment to Magtrol SA (Switzerland)... 80 iv
Magtrol WB/PB Dynamometers Table of Contents Table of Figures 2. Installation / Mounting Figure 2 1 WB/PB 2.7 Load Cell Locking System... 42 Figure 2 2 WB/PB 43 Load Cell Locking System... 43 Figure 2 3 WB/PB 65 Load Cell Locking System... 44 Figure 2 4 WB/PB 115 Load Cell Locking System... 45 Figure 2 5 WB/PB 15 Load Cell Locking System... 46 Figure 2 6 Couplings Using Key Clamping... 48 Figure 2 7 Example of Protective System... 51 Figure 2 8 WB 2.7 Ratings Curve... 52 Figure 2 9 PB 2.7 Ratings Curve... 53 Figure 2 WB 43 Ratings Curve... 53 Figure 2 11 PB 43 Ratings Curve... 54 Figure 2 12 WB 65 Ratings Curve... 54 Figure 2 13 PB 65 Ratings Curve... 55 Figure 2 14 WB 115 Ratings Curve... 55 Figure 2 15 PB 115 Ratings Curve... 56 Figure 2 16 WB 15 Ratings Curve... 56 Figure 2 17 PB 15 Ratings Curve... 57 3. Cooling Figure 3 1 Open-circuit Cooling Example... 59 Figure 3 2 Closed-circuit Cooling Example... 60 4. Connections / Configuration Figure 4 1 Manual Test Configuration... 64 Figure 4 2 PC-Based Test Configuration with M-TEST Software... 65 Figure 4 3 Tandem Configuration... 66 Figure 4 4 Supply Cable Between 24 V DC Transformer and DES Power Supply... 67 Figure 4 5 Control Signal Cable for WB/PB 2.7 and 43 Tandem Dynamometer Clutches... 67 Figure 4 6 Control Signal Cable for WB/PB 65, 115 and 15 Tandem Dynamometer Clutches... 67 Figure 4 7 Connector Pin Configuration for WB/PB 2.7 Dynamometer Power... 69 Figure 4 8 Connector Pin Configuration for WB/PB 43 Dynamometer Power and Temperature Measurement... 69 Figure 4 9 Connector Pin Configuration for WB/PB 65, 115 and 15 Dynamometer Power and Temperature Measurement... 69 Figure 4 Connector Pin Configuration for WB/PB 2.7 and 43 Dynamometer Torque Signals... 70 Figure 4 11 Connector Pin Configuration for WB/PB 65, 115 and 15 Dynamometer Torque Signals... 70 Figure 4 12 Connector Pin Configuration for WB/PB 2.7 and 43 Dynamometer Speed Signals... 71 Figure 4 13 Connector Pin Configuration for WB/PB 65, 115 and 15 Dynamometer Speed Signals... 71 6. Calibration Figure 6 1 Calibration Arm Mounting... 73 Figure 6 2 WB/PB 43 Overload Protection Calibration... 76 Figure 6 3 WB/PB 65 Overload Protection Calibration... 77 Figure 6 4 WB/PB 115 Overload Protection Calibration... 78 v
Preface Purpose of this manual This manual contains information required for the installation and general use of Magtrol s WB Series and PB Series Dynamometers. To achieve maximum capability and ensure proper use, please read this manual in its entirety before operating. Keep the manual in a safe place for quick reference whenever a question should arise. Who should use this manual This manual is intended for bench test operators who are going to use a WB Eddy-current or PB Magnetic Powder Dynamometer in order to determine the torque and power of a motor in relation to its speed. It is assumed that the user has sufficient knowledge in mechanics and electronics to be able to install/operate these WB/PB Dynamometers without risk. Manual organization This section gives an overview of the structure of the manual and the information contained therein. Some information has been deliberately repeated in different sections of the document to minimize cross-referencing and to facilitate understanding through reiteration. The structure of the manual is as follows: Chapter 1: Chapter 2: Chapter 3: Chapter 4: Chapter 5: Chapter 6: Chapter 7: Introduction Contains technical data sheets of all Magtrol WB/PB Series Dynamometers, which describe their technical characteristics and give a brief overview of their application fields. Installation / mounting Provides information needed for the mounting of the dynamometers, as well as limits and precautions to observe during operation. COOLING Describes the necessary measures to take in order to guaranty an optimal dynamometer operating temperature. CONNECTION / configuration Provides information about the wiring between the dynamometers and the electronic control units, as well as tandem setups of dynamometers. OPERATING PRINCIPLES Describes the physical phenomena on which the Eddycurrent (WB) and magnetic powder (PB) dynamometer technology is based. Calibration Provides recommended calibration schedules along with stepby-step instructions for the calibration procedure. MAINTENANCE AND Repair Provides information on how to return a WB/PB series dynamometer to Magtrol for servicing, preventative maintenance or repair. vi
Magtrol WB/PB Dynamometers Preface Conventions used in this manual The following symbols and type styles may be used in this manual to highlight certain parts of the text: Note: This is intended to draw the operator s attention to complementary information or advice relating to the subject being treated. It introduces information enabling the correct and optimal functioning of the product to be obtained. Caution : This is used to draw the operator's attention to information, directives, procedures, etc. which, if ignored, may result in damage being caused to the material being used. The associated text describes the necessary precautions to take and the consequences that may arise if the precautions are ignored. Warning! THIS INTRODUCES DIRECTIVES, PROCEDURES, PRECAUTIONARY MEASURES, ETC. WHICH MUST BE EXECUTED OR FOLLOWED WITH THE UTMOST CARE AND ATTENTION, OTHERWISE THE PERSONAL SAFETY OF THE OPERATOR OR THIRD Parties MAY BE PUT AT RISK. THE READER MUST ABSOLUTELY TAKE NOTE OF THE ACCOMPANYING TEXT, AND ACT UPON IT, BEFORE PROCEEDING FURTHER. vii
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1. Introduction 1.1 General Description The WB and PB Dynamometers manufactured by Magtrol are used for testing all types of motors and rotational systems, and measuring their torque and power according to their speed. They have been specially designed for integration in a complete motor testing system. The WB Series Dynamometers feature Eddy-current braking systems and are able to be operated at high speeds. However, as their braking torque is proportional to their speed, they cannot be used at low speeds. The PB Series Dynamometers feature magnetic powder brakes and are therefore appropriate for low and medium-speed testing. Due to their design, they generate their maximum torque at standstill. However, their maximum speed is limited to avoid the magnetic powder being centrifuged. To combine the advantages of both designs, Magtrol offers a tandem mounting of both dynamometer types for applications requiring measurements on a wide range of speeds. 1
Chapter 1 Introduction Magtrol WB/PB Dynamometers 1.2 Data sheets 1.2.1 WB/PB 2.7 Series WB/PB 2.7 Series Eddy-Current and Powder Dynamometers Features 9 Models with Maximum Torque from 300 mn m to 2400 mn m (42 oz in to 340 oz in) Braking Power: 20 W to 1 kw Stable Braking Torque, without Shock Low Moment of Inertia Low Residual Torque Operation in Either Rotational Direction Braking Torque Measurement Included Optional Speed Measurement Rated Torque Available From Zero Speed (Powder Dynamometers) Integrated Optical Speed Sensor Model 4 WB-2.7-8K Eddy-Current Dynamometer Description Eddy-Current Brake Dynamometers (WB series) are ideal for applications requiring high speeds and also when operating in the middle to high power range. Eddy-Current Brakes provide increasing torque as the speed increases, reaching peak torque at rated speed. The dynamometers have low inertia as a result of small rotor diameter. Brake cooling is provided by a water circulation system, which passes inside the stator to dissipate heat generated by the braking power. The water cooling in the WB provides high continuous power ratings (max. 1 kw). Powder Brake Dynamometers (PB series) are ideal for applications operating in the low to middle speed range or when operating in the middle to high torque range. Powder Brakes provide full torque at zero speed and are water-cooled, allowing for power ratings up to 600 W. Both WB and PB Dynamometers have accuracy ratings of ± 2% full scale - depending on size and system configuration. applications Mounted on test benches, the WB/PB 2.7 Series Dynamometers allow performance and reliability testing on driving elements such as servomotors, micromotors for cameras, small fans, dental drills, geared motors, small reduction gears, pneumatic equipment, hydraulic transmission systems and motors for small domestic appliances. Magtrol offers three types of dynamometer brakes to absorb load: Hysteresis, Eddy Current and Magnetic Powder. Each type of Dynamometer has advantages and limitations and choosing the correct one will depend largely on the type of testing to be performed. With over 50 models to choose from, Magtrol Sales professionals are readily available to assist in selecting the proper Dynamometer to meet your testing needs. Motor testing systems Magtrol s M-TEST 7 Software is a state-of-the-art motor testing program for Windows -based data acquisition. Used with a Magtrol DSP7000 Programmable Dynamometer Controller, Magtrol M-TEST 7 Software provides the control of any Magtrol Eddy-Current or Powder Brake Dynamometer and runs test sequences in a manner best suited to the overall accuracy and efficiency of the Magtrol Motor Test System. The data that is generated by Magtrol s Motor Testing Software can be stored, displayed and printed in tabular or graphic formats, and can be easily imported into a spreadsheet. Written in LabVIEW, M-TEST 7 has the flexibility to test a majority of motor types in a variety of ways. Because of LabVIEW s versatility, obtaining data from other sources (e.g. thermocouples), controlling motor power and providing audio/visual indicators is relatively easy. Magtrol s M-TEST 7 Software is ideal for simulating loads, cycling the unit under test and motor ramping. Because it is easy to gather data and duplicate tests, the software is ideal for use in engineering labs. Tests can be programmed to run on their own and saved for future use allowing for valuable time savings in production testing and incoming/outgoing inspection. 2 www.magtrol.com
Magtrol WB/PB Dynamometers Chapter 1 Introduction System Configurations WB/PB 2.7 single DYnaMoMeter configurations The Dynamometers can be complemented by various electronic modules such as the DES 4 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP7000 High Speed Programmable Dynamometer Controller. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer Speed TSC 401 Torque-Speed Conditioner Torque Excitation DES Power Supply DSP7001 Dynamometer Controller PC M-TEST USB Magtrol also offers In-Line Torque Transducers for extremely accurate torque and speed measurement with high noise immunity. The transducers employ a unique non-contact differential transformer torque measuring technology which prevents the rotation of electronic components during operation, without the usage of sliprings. For a dynamic, high-precision system, the torque transducer can be mounted in line between the unit under test and the dynamometer. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer TM Torque Transducer Speed Torque TSC 401 Torque-Speed Conditioner Excitation DES Power Supply DSP7002 Dynamometer Controller PC M-TEST USB 3
Chapter 1 Introduction Magtrol WB/PB Dynamometers Specifications WB 2.7 eddy-current DYnaMoMeter operating principles The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 2.7 Series is particularly intended for motors which rotate at high speeds, up to 50,000 rpm. The braking torque depends on the rotation speed. WB DYnaMoMeter ratings Model Rated Torque * Voltage at 20 C is 15 volts. Drag Torque De-energized Nominal Input Inertia Rated Power Rated Speed Max. Speed standard version Excitation Current* N m oz in mn m oz in kg m² lb ft s² W rpm rpm A 2 WB 2.7-8K 0.30 42.4 9 1.27 2.33-5 1.71-5 500 15,915 50,000 1.0 3 WB 2.7-8K 0.45 63.7 9 1.27 3.18-5 2.34-5 750 15,915 50,000 1.5 4 WB 2.7-8K 0.60 84.9 12 1.69 4.03-5 2.97-5 00 15,915 50,000 2.0 Optical Speed Sensor Each 2.7 Series WB Dynamometer has an optical speed sensor with a 30-bit pulse wheel delivered as standard. Cooling Water Consumption For all WB models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) WB torque speed power curves The diagram below shows the characteristic curves for the 2.7 Series Eddy-Current Dynamometers. 15,915 rpm 50,000 rpm Torque (mn m) 00 0 0 00,000 3 WB 2.7-8-K (TORQUE) 2 WB 2.7-8-K (TORQUE) 4 WB 2.7-8-K (TORQUE) 2 WB 2.7-8-K (POWER) Rotation Speed (rpm) 4 WB 2.7-8-K (POWER) 3 WB 2.7-8-K (POWER) Speed Limit for WB 00 0 0,000 Power (W) 4 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Specifications PB 2.7 powder DYnaMoMeter operating principles The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed. The element to be tested can be loaded at standstill to determine the starting torque. pb DYnaMoMeter ratings Model Rated Torque * Voltage at 20 C is 24 volts. Drag Torque De-energized Nominal Input Inertia Rated Power Rated Speed Max. Speed Excitation Current* N m oz in mn m oz in kg m² lb ft s² W rpm rpm A 1 PB 2.7-8 0.6 84 18 2.54 1.49-5 1.09-5 20 320 3000 0.5 2 PB 2.7-8 1.2 169 30 4.24 2.33-5 1.71-5 40 320 3000 1 4 PB 2.7-8 2.4 339 48 6.79 4.03-5 2.97-5 80 320 3000 2 1 PB 2.7-8K ** 0.6 84 18 2.54 1.49-5 1.09-5 150 2390,000 0.5 2 PB 2.7-8K ** 1.2 169 30 4.24 2.33-5 1.71-5 300 2390,000 1 4 PB 2.7-8K ** 2.4 339 48 6.79 4.03-5 2.97-5 600 2390,000 2 Optical Speed Sensor Each 2.7 Series PB Dynamometer has an optical speed sensor with a 30-bit pulse wheel delivered as standard. ** Cooling Circuit The 2.7 Series PB Dynamometers are available with (K) or without a cooling circuit. The cooling water consumption for all PB-8K models is: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) pb torque speed power curves The diagrams below shows the characteristic curves for the 2.7 Series Powder Dynamometers. 320 rpm 3000 rpm 2390 rpm,000 rpm 4 PB 2.7-8 (TORQUE) 4 PB 2.7-8-K (TORQUE) 2 PB 2.7-8 (TORQUE) 2 PB 2.7-8-K (TORQUE) Torque (mn m) 00 1 PB 2.7-8 (TORQUE) 0 0 00,000 4 PB 2.7-8 (POWER) 2 PB 2.7-8 (POWER) 1 PB 2.7-8 (POWER) Speed Limit for PB 00 0 0,000 Power (W) Torque (mn m) 00 1 PB 2.7-8-K (TORQUE) 0 0 00,000 4 PB 2.7-8-K (POWER) 2 PB 2.7-8-K (POWER) 1 PB 2.7-8-K (POWER) Speed Limit for PB 00 0 0,000 Power (W) Rotation Speed (rpm) Rotation Speed (rpm) 5
Chapter 1 Introduction Magtrol WB/PB Dynamometers Dimensions WB/PB 2.7 DYnaMoMeters With cooling circuit E F A B C FF *Calibration in N m with weight in kg T (removable calibration arm) 2 mm (for N m)* ØD V ØKK Tapping for calibration arm R S EXCITATION TORQUE SPEED Y Q ØK H J Z Cooling water connection Ø 6 mm ( 0.24 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. L Model units A B C D E F H J K L M mm 138 98 56 Ø 8h5 36 20 190 2 Ø 6.4 1 PB 2.7-8-K in 5.43 3.86 2.2 Ø 0.3148 1.42 0.79 7.48 8.27 Ø 0.252 0.39 0.39 0.3149 mm 162 122 80 Ø 8h5 24 20 190 2 Ø 6.4 2 WB 2.7-8-K / 2 PB 2.7-8-K in 6.38 4.8 3.15 Ø 0.3148 0.94 0.79 7.48 8.27 Ø 0.252 0.39 0.39 0.3149 mm 186 146 4 Ø 8h5 12 20 190 2 Ø 6.4 3 WB 2.7-8-K in 7.32 5.75 4.09 Ø 0.3148 0.47 0.79 7.48 8.27 Ø 0.252 0.39 0.39 0.3149 mm 2 170 128 Ø 8h5 --- 20 190 2 Ø 6.4 4 WB 2.7-8-K / 4 PB 2.7-8-K in 8.27 6.69 5.04 Ø 0.3148 --- 0.79 7.48 8.27 Ø 0.252 0.39 0.39 0.3149 N P M Model units N P Q R S T V Y Z FF KK Weight mm 80 0 45 90 ±0.1 152 220 7.6 48 81 16 Ø.5 4.2 kg 1 PB 2.7-8-K 3.547 in 3.15 3.94 1.77 5.98 8.66 0.299 1.89 3.19 0.63 Ø 0.413 9.26 lb 3.539 mm 80 0 45 90 ±0.1 152 220 7.6 48 69 16 Ø.5 5.3 kg 2 WB 2.7-8-K / 2 PB 2.7-8-K 3.547 in 3.15 3.94 1.77 5.98 8.66 0.299 1.89 2.72 0.63 Ø 0.413 11.68 lb 3.539 mm 80 0 45 90 ±0.1 152 220 7.6 48 57 16 Ø.5 6.4 kg 3 WB 2.7-8-K 3.547 in 3.15 3.94 1.77 5.98 8.66 0.299 1.89 2.24 0.63 Ø 0.413 14.11 lb 3.539 mm 80 0 45 90 ±0.1 152 220 7.6 48 45 16 Ø.5 7.5 kg 4 WB 2.7-8-K / 4 PB 2.7-8-K 3.547 in 3.15 3.94 1.77 5.98 8.66 0.299 1.89 1.77 0.63 Ø 0.413 16.53 lb 3.539 6 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Dimensions PB 2.7 DYnaMoMeters Without cooling circuit A B T (removable calibration arm) E F C FF *Calibration in N m with weight in kg 2 mm (for N m)* ØD V ØKK Tapping for calibration arm R S EXCITATION TORQUE SPEED Q ØK H J Z L N P M NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model units A B C D E F H J K L M mm 138 98 56 Ø 8h5 36 20 190 2 Ø 6.4 1 PB 2.7-8 in 5.43 3.86 2.2 Ø 0.3148 1.42 0.79 7.48 8.27 Ø 0.252 0.39 0.39 0.3149 mm 162 122 80 Ø 8h5 24 20 190 2 Ø 6.4 2 PB 2.7-8 in 6.38 4.8 3.15 Ø 0.3148 0.94 0.79 7.48 8.27 Ø 0.252 0.39 0.39 0.3149 mm 2 170 128 Ø 8h5 --- 20 190 2 Ø 6.4 4 PB 2.7-8 in 8.27 6.69 5.04 Ø 0.3148 --- 0.79 7.48 8.27 Ø 0.252 0.39 0.39 0.3149 Model units N P Q R S T V Z FF KK Weight mm 80 0 45 90 ±0.1 131 220 7.6 81 16 Ø.5 3.8 kg 1 PB 2.7-8 3.547 in 3.15 3.94 1.77 5.16 8.66 0.299 2.72 0.63 Ø 0.413 8.38 lb 3.539 mm 80 0 45 90 ±0.1 131 220 7.6 69 16 Ø.5 4.6 kg 2 PB 2.7-8 3.547 in 3.15 3.94 1.77 5.16 8.66 0.299 3.19 0.63 Ø 0.413.14 lb 3.539 mm 80 0 45 90 ±0.1 131 220 7.6 45 16 Ø.5 6.2 kg 4 PB 2.7-8 3.547 in 3.15 3.94 1.77 5.16 8.66 0.299 2.72 0.63 Ø 0.413 13.67 lb 3.539 7
Chapter 1 Introduction Magtrol WB/PB Dynamometers Ordering Information DYnaMoMeter options Vertical Mounting (V) Vertical Mounting is available on the Eddy-Current (WB) Dynamometer only. The vertical version has an adapted bearing fitting and its maximum speed is limited. Mechanical Rotor Blocking Device (MB) A mechanical rotor blocking device, which allows locked rotor testing, is available for the WB Dynamometer. WB/PB 2.7 DYnaMoMeter MoDels Eddy-Current Powder with Powder without Cooling Circuit Cooling Circuit 2 WB 2.7-8K 1 PB 2.7-8K 1 PB 2.7-8 3 WB 2.7-8K 2 PB 2.7-8K 2 PB 2.7-8 4 WB 2.7-8K 4 PB 2.7-8K 4 PB 2.7-8 ordering information If one of the listed options is desired, please follow the dynamometer model (see table above) with a dash and then the appropriate suffix (as noted in parenthesis). For example, a Model 1 WB 2.7-8K Eddy-Current Dynamometer with a maximum speed rating of 70,000 rpm is a 1 WB 2.7-8K-HS. Example: 1 WB 2.7-8K - hs Dynamometer Model Option system options and accessories ELECTRONICS SOFT- WARE MISC DESCRIPTION MODEL / PART # High Speed Programmable Dynamometer Controller DSP7000 Torque-Speed Conditioner (includes necessary cables) TSC 401/111 Power Supply (includes necessary cables) DES 4/111 High Speed Single-Phase Power Analyzer 65e High Speed Three-Phase Power Analyzer 6530 M-TEST 7 Motor Testing Software M-TEST 7 Temperature Testing Hardware HW-TTEST Couplings, Thermostatic Sluice, Pressure Sensitive Switch On Request Water Cooling System for Brake On Request Calibration Weights On Request 8
Magtrol WB/PB Dynamometers Chapter 1 Introduction 1.2.2 WB/PB 43 Series WB/PB 43 Series Eddy-Current and Powder Dynamometers Features 4 Models with Maximum Torque from 1.5 N m to N m (1.1 lb ft to 7.3 lb ft) Braking Power: 0.5 kw to 3 kw Stable Braking Torque, without Shock Low Moment of Inertia Low Residual Torque Operation in Either Rotational Direction Braking Torque Measurement Included High Rotational Speed Rated Torque Available From Zero Speed (Powder Dynamometers) Integrated Optical Speed Sensor Model 2 WB 43 Eddy-Current Dynamometer Description Eddy-Current Brake Dynamometers (WB series) are ideal for applications requiring high speeds and also when operating in the middle to high power range. Eddy-Current Brakes provide increasing torque as the speed increases, reaching peak torque at rated speed. The dynamometers have low inertia as a result of small rotor diameter. Brake cooling is provided by a water circulation system, which passes inside the stator to dissipate heat generated by the braking power. The water cooling in the WB provides high continuous power ratings (max. 3 kw). Powder Brake Dynamometers (PB series) are ideal for applications operating in the low to middle speed range or when operating in the middle to high torque range. Powder Brakes provide full torque at zero speed and are watercooled, allowing for power ratings up to 1 kw. Both WB and PB Dynamometers have accuracy ratings of ±0.3% to ±0.5% full scale, depending on size and system configuration. applications Mounted on test benches, WB/PB 43 Series Dynamometers allow performance and reliability testing on driving elements such as electric motors, combustion engines, hand-held drills, windshield wiper motors, servomotors, fans, geared motors, reduction gears, pneumatic equipment, hydraulic transmission systems and motors for domestic appliances. Magtrol offers three types of dynamometer brakes to absorb load: Hysteresis, Eddy- Current and Magnetic Powder. Each type of Dynamometer has advantages and limitations and choosing the correct one will depend largely on the type of testing to be performed. With over 50 models to choose from, Magtrol Sales professionals are readily available to assist in selecting the proper Dynamometer to meet your testing needs. Motor testing systems Magtrol s M-TEST 7 Software is a state-of-the-art motor testing program for Windows -based data acquisition. Used with a Magtrol DSP7000 Programmable Dynamometer Controller, Magtrol M-TEST 7 Software provides the control of any Magtrol Eddy-Current or Powder Brake Dynamometer and runs test sequences in a manner best suited to the overall accuracy and efficiency of the Magtrol Motor Test System. The data that is generated by Magtrol s Motor Testing Software can be stored, displayed and printed in tabular or graphic formats, and can be easily imported into a spreadsheet. Written in LabVIEW, M-TEST 7 has the flexibility to test a majority of motor types in a variety of ways. Because of LabVIEW s versatility, obtaining data from other sources (e.g. thermocouples), controlling motor power and providing audio/visual indicators is relatively easy. Magtrol s M-TEST 7 Software is ideal for simulating loads, cycling the unit under test and motor ramping. Because it is easy to gather data and duplicate tests, the software is ideal for use in engineering labs. Tests can be programmed to run on their own and saved for future use allowing for valuable time savings in production testing and incoming/outgoing inspection. www.magtrol.com 9
Chapter 1 Introduction Magtrol WB/PB Dynamometers System Configurations WB/PB 43 single DYnaMoMeter configurations The Dynamometers can be complemented by various electronic modules such as the DES 4 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP7000 High Speed Programmable Dynamometer Controller. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer Speed TSC 401 Torque-Speed Conditioner Torque Excitation DES Power Supply DSP7001 Dynamometer Controller PC M-TEST USB Magtrol also offers In-Line Torque Transducers, which employ a unique non-contact differential transformer torque measuring technology providing extremely accurate torque and speed measurement with superior electrical noise immunity. For a dynamic, high-precision system, the torque transducer can be mounted in line between the unit under test and the dynamometer. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer TM Torque Transducer Speed Torque Excitation TSC 401 Torque-Speed Conditioner DES Power Supply DSP7002 Dynamometer Controller PC M-TEST USB tandem configuration Magtrol offers Eddy-Current and Powder Dynamometers mounted in tandem. In tandem, the unique features of each type of dynamometer brake are utilized, allowing the unit under test to be applied with nominal braking torque from zero speed to maximum rotation. The Tandem Dynamometers are available on a number of WB/PB combinations. Powder Brake Dynamometer (PB) Clutch (EK) Eddy-Current Brake Dynamometer (WB) TSC 401 Torque/Speed Conditioner DES Power Supply Torque Excitation Transformer Speed Torque Excitation TSC 401 Torque-Speed Conditioner DES Power Supply DSP7002 Dynamometer Controller PC M-TEST USB MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Specifications WB 43 eddy-current DYnaMoMeter operating principles The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 43 Series is particularly intended for motors which rotate at high speeds, up to 50,000 rpm. The braking torque depends on the rotation speed. WB DYnaMoMeter ratings Model Rated Torque * Voltage at 20 C is 24 volts. Drag Torque De-energized Nominal Input Inertia Rated Power Rated Speed standard version Max. Speed high-speed version (HS) Excitation Current* N m lb ft mn m oz in kg m² lb ft s² kw rpm rpm rpm A 1 WB 43 1.5 1.1 15 2.12 1.21-4 8.92-5 1.5 9550 50,000 65,000 1 2 WB 43 3.0 2.2 30 4.24 2.17-4 1.60-4 3 9550 50,000 65,000 2 Optical Speed Sensor Each 43 Series WB Dynamometer has an optical speed sensor with a 30-bit pulse wheel delivered as standard. Cooling Water Consumption For all WB models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) WB torque speed power curves The diagram below shows the characteristic curves for the 43 Series Eddy-Current Dynamometers. 9550 rpm 50.000 rpm Torque (N m) 1 0.1 2 WB 43 (TORQUE) 1 WB 43 (TORQUE) 2 WB 43 (POWER) 1 WB 43 (POWER) Speed Limit for WB 1 0.1 Power (kw) 0 00,000 0,000 Rotation Speed (rpm) 11
Chapter 1 Introduction Magtrol WB/PB Dynamometers Specifications PB 43 powder DYnaMoMeter operating principles The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed. The element to be tested can be loaded at standstill to determine the starting torque. pb DYnaMoMeter ratings * Voltage at 20 C is 24 volts. Drag Torque De-energized Rated Power Rated Speed Max. Speed Excitation Current* Model Rated Torque Nominal Input Inertia N m lb ft N m oz in kg m² lb ft s² kw rpm rpm A 1 PB 43 5 3.6 0.1 14.1 1.41-4 1.03-4 0.5 955 4000 1 2 PB 43 7.3 0.2 28.3 2.40-4 1.77-4 1 955 4000 2 Optical Speed Sensor Each 43 Series PB Dynamometer has an optical speed sensor with a 30-bit pulse wheel delivered as standard. For better speed resolution in low speed applications, Magtrol offers a 600-bit or 6000-bit speed pickup (encoder) as an option. Cooling Water Consumption For all PB models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) pb torque speed power curves The diagram below shows the characteristic curves for the 43 Series Powder Dynamometers. 0 955 rpm 4000 rpm 2 PB 43 (TORQUE) 1 Torque (N m) 1 PB 43 (TORQUE) 1 0.1 0 00 2 PB 43 (POWER) 1 PB 43 (POWER) Speed Limit for PB 0.1 0.01,000 Power (kw) Rotation Speed (rpm) 12 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Specifications WB/PB 43 single DYnaMoMeter DiMensions Center hole DIN 232-D M4 A B C Tapping for calibration arm *Use outer groove to achieve calibration in N m when using weight in kg T (removable calibration arm) X ØU 255 mm (for N m)* 250 mm (for mkp) ØD V W E F Inlet EXCITATION TORQUE SPEED ØK R S Q Y L Z G H J M Reference surface N P Cooling water connection Ø mm ( 0.39 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model units A B C D E F G H J K L M N mm 240 186 0 Ø 12h6 22 25 202 240 284 Ø 9 22 22 160 1 WB 43 / 1 PB 43 in 9.45 7.32 3.94 Ø 0.4724 0.87 0.98 7.95 9.45 11.18 Ø 0.35 0.87 0.87 6.30 0.4721 mm 290 236 150 Ø 12h6 22 25 252 290 334 Ø 9 22 22 160 2 WB 43 / 2 PB 43 in 11.42 9.29 5.91 Ø 0.4724 0.87 0.98 9.92 11.42 13.15 Ø 0.35 0.87 0.87 6.30 0.4721 Model units P Q R S T U V W X Y Z Weight mm 202 25 125 ±0.05 198 524 Ø 145 4h9 15 80 46 153 24 kg 1 WB 43 / 1 PB 43 4.923 in 7.95 0.98 7.80 20.63 Ø 5.71 0.1574 0.59 3.15 1.81 6.02 52.91 lb 4.919 0.1563 mm 202 25 125 ±0.05 198 524 Ø 145 4h9 15 80 46 167 31 kg 2 WB 43 / 2 PB 43 in 7.95 0.98 4.923 4.919 7.80 20.63 Ø 5.71 0.1574 0.1563 0.59 3.15 1.81 6.57 68.34 lb Shaft of high speed version (HS) is Ø 20-h6 mm, smooth (no key), with different length. Drawing on request or available at www.magtrol/support/salesdrawings.htm 13
Chapter 1 Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 43 tandem operating principles Because the characteristics of the WB and PB dynamometers are complementary, Magtrol is able to offer them mounted in a tandem setup. Each dynamometer (WB and PB) can autonomously operate according to its own characteristics. An electromagnetic clutch is needed for this application which automatically switches off at the maximum speed of the PB Powder Dynamometer and automatically switches on at zero speed. tandem DYnaMoMeter ratings * Voltage at 20 C is 24 volts. Drag Torque De-energized Rated Power Rated Speed Max. Speed Excitation Current* Model Rated Torque Nominal Input Inertia N m lb ft N m oz in kg m² lb ft s² kw rpm rpm A 2 WB 43 + EK + 1 PB 43 5 3.6 0.13 18.4 4.82-4 3.56-4 3 9550 25,000 2 2 WB 43 + EK + 2 PB 43 7.3 0.23 32.5 5.81-4 4.28-4 3 9550 25,000 2 Optical Speed Sensor Each 43 Series Tandem Dynamometer has an optical speed sensor with a 30-bit pulse wheel delivered as standard. Cooling Water Consumption For all Tandem models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) tandem torque speed power curves The diagrams below shows the characteristic curves for the 43 Series Tandem Dynamometers. 0 955 rpm 9550 rpm 25,000 rpm 0 2 WB 43 + EK + 2 PB 43 (TORQUE) Torque (N m) 2 WB 43 + EK + 1 PB 43 (TORQUE) Power (kw) 1 2 WB 43 + EK + 2 PB 43 (POWER) 2 WB 43 + EK + 1 PB 43 (POWER) 0.1 0 00,000 Rotation Speed (rpm) Speed Limit for Tandem 43 1 0.1 0,000 14 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Tandem Specifications WB/PB 43 tandem DiMensions DRIVE SIDE E F Electromagnetic tooth clutch (EK) A AA BB WB 43 PB 43 T (removable calibration arm) 255 mm (for N m)* * Use outer groove to achieve calibration 250 mm (for mkp) in N m when using X weight in kg ØD V W S EXCITATION TORQUE SPEED EXCITATION TORQUE CLUTCH R Inlet Inlet Y Q L DD G CC H J N P Cooling water connection Ø mm ( 0.39 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. GG Model units A D E F G H J K L M N P Q mm 290 Ø 12h6 23 25 250 560 600 Ø 11 20 35 180 250 30 2 WB 43 + EK + 1 PB 43 in 9.45 Ø 0.4724 0.91 0.98 7.87 22.05 23.62 Ø 0.43 0.79 1.38 7.09 9.84 1.18 0.4721 mm 290 Ø 12h6 23 25 250 6 650 Ø 11 20 35 180 250 30 2 WB 43 + EK + 2 PB 43 in 9.45 Ø 0.4724 0.91 0.98 7.87 24.02 25.59 Ø 0.43 0.79 1.38 7.09 9.84 1.18 0.4721 M ØK Model units R S T V W X Y AA BB CC DD GG Weight mm 140 ±0.03 213 524 4h9 15 80 61 240 12 52 43 200 55 kg 2 WB 43 + EK + 1 PB 43 5.513 0.1574 in 8.39 20.63 5.511 0.1563 0.59 3.15 2.40 9.45 0.47 2.05 1.69 7.87 121.25 lb mm 140 ±0.03 213 524 4h9 15 80 61 290 12 52 43 250 65 kg 2 WB 43 + EK + 2 PB 43 in 5.513 5.511 8.39 20.63 0.1574 0.1563 0.59 3.15 2.40 11.42 0.47 2.05 1.69 9.84 143.29 lb 15
Chapter 1 Introduction Magtrol WB/PB Dynamometers Ordering Information DYnaMoMeter options High Speed (HS) For testing small/miniature high-speed motors, Magtrol offers a WB 43 Eddy-Current Dynamometer with speed ranges up to 65,000 rpm. Industrial Version (IS) Single WB and PB Dynamometers are also available in an industrial version which includes bearing supports, but does not provide a base plate, or torque and speed measurement. Vertical Mounting (V) Vertical Mounting is available on the Eddy-Current (WB) Dynamometer only. The vertical version has an adapted bearing fitting and its maximum speed is limited. Speed Pickup (DG) All models, including tandems, are equipped with a 30-bit optical speed sensor. On PB Dynamometers, a 600-bit or 6000-bit speed pickup (encoder) is available as an option for low speed applications. WB/PB 43 Mechanical Rotor Blocking Device (MB) A mechanical rotor blocking device, which allows locked rotor testing, is available for the WB Dynamometer. DYnaMoMeter MoDels Eddy-Current Powder Tandem 1 WB 43 1 PB 43 2 WB 43 + EK + 1 PB 43 2 WB 43 2 PB 43 2 WB 43 + EK + 2 PB 43 ordering information If one of the listed options is desired, please follow the dynamometer model (see table above) with a dash and then the appropriate suffix (as noted in parenthesis). For example, a Model 1 PB 43 Powder Dynamometer with an optional 600- bit speed pickup is a 1 PB 43 - DG - 600. Example: 1 pb 43 - Dg - 600 Dynamometer Model Option system options and accessories ELECTRONICS SOFT- WARE MISC DESCRIPTION MODEL / PART # High Speed Programmable Dynamometer Controller DSP7000 Torque-Speed Conditioner (includes necessary cables) TSC 401/111 Power Supply (includes necessary cables) DES 4/111 High Speed Single-Phase Power Analyzer 65e High Speed Three-Phase Power Analyzer 6530 M-TEST 7 Motor Testing Software M-TEST 7 Temperature Testing Hardware HW-TTEST Dynamometer Table (with grooved table top) 005449 Transformer (24 VDC) for electromagnetic clutch of tandem dynamometers 234-311-920-011 Couplings, Thermostatic Sluice, Pressure Sensitive Switch On Request Water Cooling System for Brake On Request Calibration Weights On Request 16
Magtrol WB/PB Dynamometers Chapter 1 Introduction 1.2.3 WB/PB 65 Series WB/PB 65 Series Eddy-Current and Powder Dynamometers Features 4 Models with Maximum Torque from N m to 50 N m (7.3 lb ft to 36 lb ft) Braking Power: 1.5 kw to 12 kw Stable Braking Torque, without Shock Low Moment of Inertia Low Residual Torque Operation in Either Rotational Direction Braking Torque Measurement Included High Rotational Speed Rated Torque Available From Zero Speed (Powder Dynamometers) Integrated Optical Speed Sensor Model 1 WB 65-HS Eddy-Current Dynamometer Description Eddy-Current Brake Dynamometers (WB series) are ideal for applications requiring high speeds and also when operating in the middle to high power range. Eddy-Current Brakes provide increasing torque as the speed increases, reaching peak torque at rated speed. The dynamometers have low inertia as a result of small rotor diameter. Brake cooling is provided by a water circulation system, which passes inside the stator to dissipate heat generated by the braking power. The water cooling in the WB provides high continuous power ratings (max. 12 kw). Powder Brake Dynamometers (PB series) are ideal for applications operating in the low to middle speed range or when operating in the middle to high torque range. Powder Brakes provide full torque at zero speed and are water-cooled, allowing for power ratings up to 3 kw. Both WB and PB Dynamometers have accuracy ratings of ±0.3% to ±0.5% full scale, depending on size and system configuration. applications Mounted on test benches, WB/PB 65 Series Dynamometers allow performance and reliability testing on driving elements such as electric motors, combustion engines, hand-held power tools, windshield wiper motors, servomotors, fans, geared motors, reduction gears, pneumatic equipment, hydraulic Magtrol offers three types of dynamometer brakes to absorb load: Hysteresis, Eddy- Current and Magnetic Powder. Each type of Dynamometer has advantages and limitations and choosing the correct one will depend largely on the type of testing to be performed. With over 50 models to choose from, Magtrol Sales professionals are readily available to assist in selecting the proper Dynamometer to meet your testing needs. 17 transmission systems, motors for domestic appliances, starter motors, gas turbines and turbocompressors. Motor testing systems Magtrol s M-TEST 7 Software is a state-of-the-art motor testing program for Windows -based data acquisition. Used with a Magtrol DSP7000 Programmable Dynamometer Controller, Magtrol M-TEST 7 Software provides the control of any Magtrol Eddy-Current or Powder Brake Dynamometer and runs test sequences in a manner best suited to the overall accuracy and efficiency of the Magtrol Motor Test System. The data that is generated by Magtrol s Motor Testing Software can be stored, displayed and printed in tabular or graphic formats, and can be easily imported into a spreadsheet. Written in LabVIEW, M-TEST 7 has the flexibility to test a majority of motor types in a variety of ways. Because of LabVIEW s versatility, obtaining data from other sources (e.g. thermocouples), controlling motor power and providing audio/visual indicators is relatively easy. Magtrol s M-TEST 7 Software is ideal for simulating loads, cycling the unit under test and motor ramping. Because it is easy to gather data and duplicate tests, the software is ideal for use in engineering labs. Tests can be programmed to run on their own and saved for future use allowing for valuable time savings in production testing and incoming/outgoing inspection. www.magtrol.com
Chapter 1 Introduction Magtrol WB/PB Dynamometers System Configurations WB/PB 65 single DYnaMoMeter configurations The Dynamometers can be complemented by various electronic modules such as the DES 411 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP7000 High Speed Programmable Dynamometer Controller. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer Speed TSC 401 Torque-Speed Conditioner Torque Excitation DES Power Supply DSP7001 Dynamometer Controller PC M-TEST USB Magtrol also offers In-Line Torque Transducers, which employ a unique non-contact differential transformer torque measuring technology providing extremely accurate torque and speed measurement with superior electrical noise immunity. For a dynamic, high-precision system, the torque transducer can be mounted in line between the unit under test and the dynamometer. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer TM Torque Transducer Speed Torque Excitation TSC 401 Torque-Speed Conditioner DES Power Supply DSP7002 Dynamometer Controller PC M-TEST USB tandem configuration Magtrol offers Eddy-Current and Powder Dynamometers mounted in tandem. In tandem, the unique features of each type of dynamometer brake are utilized, allowing the unit under test to be applied with nominal braking torque from zero speed to maximum rotation. The Tandem Dynamometers are available on a number of WB/PB combinations. Powder Brake Dynamometer (PB) Clutch (EK) Eddy-Current Brake Dynamometer (WB) TSC 401 Torque/Speed Conditioner DES Power Supply Torque Excitation Transformer Speed Torque Excitation TSC 401 Torque-Speed Conditioner DES Power Supply DSP7002 Dynamometer Controller PC M-TEST USB 18 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Specifications WB 65 eddy-current DYnaMoMeter operating principles The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 65 Series is particularly intended for motors which rotate at high speeds, up to 30,000 rpm. The braking torque depends on the rotation speed. WB DYnaMoMeter ratings Model Rated Torque * Voltage at 20 C is 30 volts. Drag Torque De-energized Nominal Input Inertia Rated Power Rated Speed standard version Max. Speed high-speed version (HS) Excitation Current* N m lb ft N m lb in kg m² lb ft s² kw rpm rpm rpm A 1 WB 65 7.3 0.1 0.88 0.82-3 6.04-4 6 5730 30,000 50,000 2.5 2 WB 65 20 14.7 0.2 1.77 1.55-3 1.14-3 12 5730 30,000 50,000 5 Optical Speed Sensor Each 65 Series WB Dynamometer has an optical speed sensor with a 60-bit pulse wheel delivered as standard. Cooling Water Consumption For all WB models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) WB torque speed power curves The diagram below shows the characteristic curves for the 65 Series Eddy-Current Dynamometers. 0 5730 rpm 30,000 rpm 0 Torque (N m) 1 0.1 2 WB 65 (TORQUE) 1 WB 65 (TORQUE) 2 WB 65 (POWER) 1 WB 65 (POWER) Speed Limit for WB 1 0.1 Power (kw) 0 00,000 0,000 Rotation Speed (rpm) 19
Chapter 1 Introduction Magtrol WB/PB Dynamometers Specifications PB 65 powder DYnaMoMeter operating principles The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed. The element to be tested can be loaded at standstill to determine the starting torque. pb DYnaMoMeter ratings * Voltage at 20 C is 30 volts. Drag Torque De-energized Rated Power Rated Speed Max. Speed Excitation Current* Model Rated Torque Nominal Input Inertia N m lb ft N m lb in kg m² lb ft s² kw rpm rpm A 1 PB 65 25 18.4 0.5 4.42 0.92-3 6.78-4 1.5 570 3000 2.5 2 PB 65 50 36.8 1.0 8.85 1.71-3 1.26-3 3 570 3000 5 Optical Speed Sensor Each 65 Series PB Dynamometer has an optical speed sensor with a 60-bit pulse wheel delivered as standard. For better speed resolution in low speed applications, Magtrol offers a 600-bit or 6000-bit speed pickup (encoder) as an option. Cooling Water Consumption For all PB models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) pb torque speed power curves The diagram below shows the characteristic curves for the 65 Series Powder Dynamometers. 0 570 rpm 3000 rpm 2 PB 65 (TORQUE) 1 PB 65 (TORQUE) 1 Torque (N m) 1 2 PB 65 (POWER) 1 PB 65 (POWER) 0.1 Power (kw) 0.1 0 00 Rotation Speed (rpm) Speed Limit for PB 0.01,000 20 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Specifications WB/PB 65 single DYnaMoMeter DiMensions A B C Tapping for calibration arm T (removable calibration arm) 5 mm (for N m)* X 500 mm (for mkp) ØU *Use outer groove to achieve calibration in N m when using weight in kg Center hole DIN 332-D M5 ØD V W E F INLET EXCITATION TORQUE SPEED ØK R S Y L Z G H J M Reference surface Q N P Cooling water connection Ø mm ( 0.39 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model units A B C D E F G H J K L M N mm 300 225 112 Ø 18h6 22 36 260 3 342 Ø 11 17 17 250 1 WB 65 / 1 PB 65 in 11.81 8.86 4.41 Ø 0.7086 0.87 1.42.24 12.2 13.46 Ø 0.43 0.67 0.67 9.84 0.7083 mm 370 295 182 Ø 18h6 22 36 330 380 412 Ø 11 17 17 250 2 WB 65 / 2 PB 65 in 14.57 11.61 7.17 Ø 0.7086 0.87 1.42 12.99 14.96 16.22 Ø 0.43 0.67 0.67 9.84 0.7083 Model units P Q R S T U V W X Y Z Weight mm 282 25 150 ±0.1 240 34 Ø 180 6h9 23 5 50 128 55 kg 1 WB 65 / 1 PB 65 5.909 in 11. 0.98 9.45 40.71 Ø 7.09 0.2362 0.91 4.13 1.97 5.04 121.25 lb 5.902 0.2351 mm 282 25 150 ±0.1 240 34 Ø 180 6h9 23 5 50 128 70 kg 2 WB 65 / 2 PB 65 in 11. 0.98 5.909 5.902 9.45 40.71 Ø 7.09 0.2362 0.2351 Shaft of high speed version (HS) is Ø 25-h6 mm, smooth (no key), with different length. Drawing on request or available at www.magtrol/support/salesdrawings.htm 0.91 4.13 1.97 5.04 154.32 lb 21
Chapter 1 Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 65 tandem operating principles Because the characteristics of the WB and PB Dynamometers are complementary, Magtrol is able to offer them mounted in a tandem setup. Each dynamometer (WB and PB) can autonomously operate according to its own characteristics. An electromagnetic clutch is needed for this application which automatically switches off at the maximum speed of the PB Powder Dynamometer and automatically switches on at zero speed. tandem DYnaMoMeter ratings * Voltage at 20 C is 30 volts. Drag Torque De-energized Rated Power Rated Speed Max. Speed Excitation Current* Model Rated Torque Nominal Input Inertia N m lb ft N m lb ft kg m² lb ft s² kw rpm rpm A 2 WB 65 + EK + 1 PB 65 25 18.4 0.7 6.19 3.19-3 2.35-3 12 5730 18,000 5 2 WB 65 + EK + 2 PB 65 50 36.8 1.2.62 3.98-3 2.93-3 12 5730 18,000 5 Optical Speed Sensor Each 65 Series Tandem Dynamometer has an optical speed sensor with a 60-bit pulse wheel delivered as standard. Cooling Water Consumption For all Tandem models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) tandem torque speed power curves The diagram below shows the characteristic curves for the 65 Series Tandem Dynamometers. 0 570 rpm 5730 rpm 18,000 rpm 0 2 WB 65 + EK + 2 PB 65 (TORQUE) 2 WB 65 + EK + 1 PB 65 (TORQUE) Torque (N m) Power (kw) 2 WB 65 + EK + 2 PB 65 (POWER) 2 WB 65 + EK + 1 PB 65 (POWER) 1 0 00,000 Rotation Speed (rpm) Speed Limit for Tandem 65 1 0,000 22
Magtrol WB/PB Dynamometers Chapter 1 Introduction Tandem Specifications WB/PB 65 tandem DiMensions DRIVE SIDE Electromagnetic tooth clutch (EK) A AA WB 65 BB PB 65 T (removable calibration arm) 5 mm (for N m)* * Use outer groove to achieve calibration 500 mm (for mkp) in N m when using weight in kg X ØD F V INLET EXCITATION TORQUE SPEED INLET EXCITATION TORQUE SPEED R W S QQ Y Reference surface DD L G CC H J GG ØK L M EE N P Cooling water connection Ø mm ( 0.39 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model units A D F G H J K L M N P R S mm 370 Ø 18h6 36 330 590 690 Ø 13 50 20 340 380 235 ±0.02 325 2 WB 65 + EK + 1 PB 65 in 14.57 Ø 0.7086 0.7083 1.42 12.99 23.23 27.17 Ø 0.51 1.97 0.79 13.39 14.96 9.260 9.244 12.80 mm 370 Ø 18h6 36 330 660 760 Ø 13 50 20 340 380 235 ±0.02 325 2 WB 65 + EK + 2 PB 65 in 14.57 Ø 0.7086 0.7083 1.42 12.99 25.98 29.92 Ø 0.51 1.97 0.79 13.39 14.96 9.260 9.244 12.80 Model units T V W X Y AA BB CC DD EE GG QQ Weight mm 34 6h9 23 5 135 300 20 60 20 155 ±0.1 260 15 135 kg 2 WB 65 + EK + 1 PB 65 in 40.71 0.2362 0.2351 0.91 4.13 5.31 11.81 0.79 2.36 0.79 6.6.24 0.59 297.62 lb 6.098 mm 34 6h9 23 5 135 370 20 60 20 155 ±0.1 330 15 150 kg 2 WB 65 + EK + 2 PB 65 in 40.71 0.2362 0.2351 0.91 4.13 5.31 14.57 0.79 2.36 0.79 6.6 12.99 0.59 330.69 lb 6.098 23
Chapter 1 Introduction Magtrol WB/PB Dynamometers Ordering Information WB/PB 65 DYnaMoMeter options High Speed (HS) For testing small/miniature high-speed motors, Magtrol offers a WB 65 Eddy-Current Dynamometer with speed ranges up to 50,000 rpm. Industrial Version (IS) Single WB and PB Dynamometers are also available in an industrial version which includes bearing supports, but does not provide a base plate, or torque and speed measurement. Vertical Mounting (V) Vertical Mounting is available on the Eddy-Current (WB) Dynamometer only. The vertical version has an adapted bearing fitting and its maximum speed is limited. Speed Pickup (DG) All models, including tandems, are equipped with a 60-bit optical speed sensor. On PB Dynamometers, a 600-bit or 6000-bit speed pickup (encoder) is available as an option for low speed applications. Mechanical Rotor Blocking Device (MB) A mechanical rotor blocking device, which allows locked rotor testing, is available for the WB Dynamometer. DYnaMoMeter MoDels Eddy-Current Powder Tandem 1 WB 65 1 PB 65 2 WB 65 + EK + 1 PB 65 2 WB 65 2 PB 65 2 WB 65 + EK + 2 PB 65 ordering information If one of the listed options is desired, please follow the dynamometer model (see table above) with a dash and then the appropriate suffix (as noted in parenthesis). For example, a Model 1 PB 65 Powder Dynamometer with an optional 6000-bit speed pickup is a 1 PB 65 - DG - 6000. Example: 1 pb 65 - Dg - 6000 Dynamometer Model Option system options and accessories ELECTRONICS SOFT- WARE MISC DESCRIPTION MODEL / PART # High Speed Programmable Dynamometer Controller DSP7000 Torque-Speed Conditioner (includes necessary cables) TSC 401/121 Power Supply (includes necessary cables) DES 411/111 High Speed Single-Phase Power Analyzer 65e High Speed Three-Phase Power Analyzer 6530 M-TEST 7 Motor Testing Software M-TEST 7 Temperature Testing Hardware HW-TTEST Dynamometer Table (with grooved table top) 005450 Transformer (24 VDC) for electromagnetic clutch of tandem dynamometers 234-311-920-011 Couplings, Thermostatic Sluice, Pressure Sensitive Switch On Request Water Cooling System for Brake On Request Calibration Weights On Request 24
Magtrol WB/PB Dynamometers Chapter 1 Introduction 1.2.4 WB/PB 115 Series WB/PB 115 Series Eddy-Current and Powder Dynamometers Features 4 Models with Maximum Torque from 50 N m to 200 N m (36 lb ft to 147 lb ft) Braking Power: 5 kw to 30 kw Stable Braking Torque, without Shock Low Moment of Inertia Low Residual Torque Operation in Either Rotational Direction Braking Torque Measurement Included High Rotational Speed Rated Torque Available From Zero Speed (Powder Dynamometers) Integrated Optical Speed Sensor Model 1 PB 115 Powder Dynamometer Description Eddy-current Brake Dynamometers (WB series) are ideal for applications requiring high speeds and also when operating in the middle to high power range. Eddy-Current Brakes provide increasing torque as the speed increases, reaching peak torque at rated speed. The dynamometers have low inertia as a result of small rotor diameter. Brake cooling is provided by a water circulation system, which passes inside the stator to dissipate heat generated by the braking power. The water cooling in the WB provides high continuous power ratings (max. 30 kw). Powder Brake Dynamometers (PB series) are ideal for applications operating in the low to middle speed range or when operating in the middle to high torque range. Powder Brakes provide full torque at zero speed and are watercooled, allowing for power ratings up to kw. Both WB and PB Dynamometers have accuracy ratings of ±0.3% to ±0.5% full scale, depending on size and system configuration. applications Mounted on test benches, WB/PB 115 Series Dynamometers allow performance and reliability testing on driving elements such as electric motors, combustion engines, hand-held drills, servomotors, fans, geared motors, reduction gears, pneumatic equipment, hydraulic transmission systems, starter motors, gas turbines and turbocompressors. Magtrol offers three types of dynamometer brakes to absorb load: Hysteresis, Eddycurrent and Magnetic Powder. Each type of Dynamometer has advantages and limitations and choosing the correct one will depend largely on the type of testing to be performed. With over 50 models to choose from, Magtrol Sales professionals are readily available to assist in selecting the proper Dynamometer to meet your testing needs. Motor testing systems Magtrol s M-TEST 7 Software is a state-of-the-art motor testing program for Windows -based data acquisition. Used with a Magtrol DSP7000 Programmable Dynamometer Controller, Magtrol M-TEST 7 Software provides the control of any Magtrol Eddy-Current or Powder Brake Dynamometer and runs test sequences in a manner best suited to the overall accuracy and efficiency of the Magtrol Motor Test System. The data that is generated by Magtrol s Motor Testing Software can be stored, displayed and printed in tabular or graphic formats, and can be easily imported into a spreadsheet. Written in LabVIEW, M-TEST 7 has the flexibility to test a majority of motor types in a variety of ways. Because of LabVIEW s versatility, obtaining data from other sources (e.g. thermocouples), controlling motor power and providing audio/visual indicators is relatively easy. Magtrol s M-TEST 7 Software is ideal for simulating loads, cycling the unit under test and motor ramping. Because it is easy to gather data and duplicate tests, the software is ideal for use in engineering labs. Tests can be programmed to run on their own and saved for future use allowing for valuable time savings in production testing and incoming/outgoing inspection. www.magtrol.com 25
Chapter 1 Introduction Magtrol WB/PB Dynamometers System Configurations WB/PB 115 single DynaMoMeter configurations The Dynamometers can be complemented by various electronic modules such as the DES 411 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP7001 High Speed Programmable Dynamometer Controller. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer Speed TSC 401 Torque-Speed Conditioner Torque Excitation DES Power Supply DSP7001 Dynamometer Controller PC M-TEST USB Magtrol also offers In-Line Torque Transducers, which employ a unique non-contact differential transformer torque measuring technology providing extremely accurate torque and speed measurement with superior electrical noise immunity. For a dynamic, high-precision system, the torque transducer can be mounted in line between the unit under test and the dynamometer. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer TM Torque Transducer Speed Torque Excitation TSC 401 Torque-Speed Conditioner DES Power Supply DSP7002 Dynamometer Controller PC M-TEST USB tandem configuration Magtrol offers Eddy-Current and Powder Dynamometers mounted in tandem. In tandem, the unique features of each type of dynamometer brake are utilized, allowing the unit under test to be applied with nominal braking torque from zero speed to maximum rotation. The Tandem Dynamometers are available on a number of WB/PB combinations. Powder Brake Dynamometer (PB) Clutch (EK) Eddy-Current Brake Dynamometer (WB) TSC 401 Torque/Speed Conditioner DES Power Supply Torque Excitation Transformer Speed Torque Excitation TSC 401 Torque-Speed Conditioner DES Power Supply DSP7002 Dynamometer Controller PC M-TEST USB 26 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Specifications WB 115 eddy-current DynaMoMeter operating principles The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 115 Series is particularly intended for motors which rotate at high speeds, up to 22,000 rpm. The braking torque depends on the rotation speed. WB DynaMoMeter ratings Model Rated Torque * Voltage at 20 C is 30 volts. Drag Torque De-energized Nominal Input Inertia Rated Power Rated Speed standard version Max. Speed high-speed version (HS) Excitation Current* N m lb ft N m lb in kg m² lb ft s² kw rpm rpm rpm A 1 WB 115 50 36.8 0.5 4.43 1.27-2 9.36-3 15 2865 18,000 22,000 2.5 2 WB 115 0 73.7 1.0 8.85 2.57-2 1.89-2 30 2865 18,000 22,000 5 Optical Speed Sensor Each 115 Series WB Dynamometer has an optical speed sensor with a 60-bit pulse wheel delivered as standard. Cooling Water Consumption For all WB models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) WB torque speed power curves The diagram below shows the characteristic curves for the 115 Series Eddy-Current Dynamometers. 0 2865 rpm 18,000 rpm 0 2 WB 115 (TORQUE) 1 WB 115 (TORQUE) Torque (N m) 1 0.1 2 WB 115 (POWER) 1 WB 115 (POWER) 0 00,000 0,000 Rotation Speed (rpm) Speed limit for WB 1 0.1 Power (kw) 27
Chapter 1 Introduction Magtrol WB/PB Dynamometers Specifications PB 115 powder DynaMoMeter operating principles The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed. The element to be tested can be loaded at standstill to determine the starting torque. pb DynaMoMeter ratings * Voltage at 20 C is 30 volts. Drag Torque De-energized Rated Power Rated Speed Max. Speed Excitation Current* Model Rated Torque Nominal Input Inertia N m lb ft N m lb in kg m² lb ft s² kw rpm rpm A 1 PB 115 0 73.7 2 17.7 1.24-2 9.14-3 5 480 3000 2.5 2 PB 115 200 147.5 4 35.4 2.50-2 1.84-2 480 3000 5 Optical Speed Sensor Each 115 Series PB Dynamometer has an optical speed sensor with a 60-bit pulse wheel delivered as standard. For better speed resolution in low speed applications, Magtrol offers a 600-bit or 6000-bit speed pickup (encoder) as an option. Cooling Water Consumption For all PB models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) pb torque speed power curves The diagram below shows the characteristic curves for the 115 Series Powder Dynamometers. 00 480 rpm 3000 rpm 2 PB 115 (TORQUE) 0 1 PB 115 (TORQUE) 1 Torque (N m) 1 1 0 00 2 PB 115 (POWER) 1 PB 115 (POWER) Speed Limit for PB 0.1 0.01,000 Power (kw) Rotation Speed (rpm) 28 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Specifications WB/PB 115 single DynaMoMeter DiMensions Center hole DIN 332-D M8 A B C Tapping for calibration arm T (removable calibration arm) 5 mm (for N m)* X 500 mm (for mkp) ØU * Use outer groove to achieve calibration in N m when using weight in kg F V ØD W S E R INLET EXCITATION TORQUE SPEED Y ØK Q Z M N L DD G H J Reference surface P SS Cooling water connection Ø 15 mm ( 0.59 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model units A B C D E F G H J K L M N P mm 390 280 166 Ø 32h6-40 54 360 430 470 Ø 11 20 40 200 280 1 WB 115 / 1 PB 115 in 15.35 11.02 6.54 Ø 1.2598-1.57 2.13 14.17 16.93 18.50 Ø 0.43 0.79 1.57 7.87 11.02 1.2593 mm 500 390 276 Ø 32h6 15 54 360 430 470 Ø 11 20 40 200 280 2 WB 115 / 2 PB 115 in 19.69 15.35.87 Ø 1.2598 0.59 2.13 14.17 16.93 18.50 Ø 0.43 0.79 1.57 7.87 11.02 1.2593 Model units Q R S T U V W X Y Z DD SS Weight mm 75 200 ±0.1 325 38 Ø 250 h9 38 125 30 197 55 80 80 kg 1 WB 115 / 1 PB 115 7.878 0.3937 in 2.95 12.80 40.87 Ø 9.84 1.50 4.92 1.18 7.76 2.17 3.15 176.37 lb 7.870 0.3932 mm 75 200 ±0.1 325 38 Ø 250 h9 38 125 30 235 55 80 130 kg 2 WB 115 / 2 PB 115 7.878 0.3937 in 2.95 12.80 40.87 Ø 9.84 1.50 4.92 1.18 9.25 2.17 3.15 286.60 lb 7.870 0.3932 29
Chapter 1 Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 115 tandem operating principles Because the characteristics of the WB and PB dynamometers are complementary, Magtrol is able to offer them mounted in a tandem setup. Each dynamometer (WB and PB) can autonomously operate according to its own characteristics. An electromagnetic clutch is needed for this application which automatically switches off at the maximum speed of the PB Powder Dynamometer and automatically switches on at zero speed. tandem DynaMoMeter ratings * Voltage at 20 C is 30 volts. Drag Torque De-energized Rated Power Rated Speed Max. Speed Excitation Current* Model Rated Torque Nominal Input Inertia N m lb ft N m lb in kg m² lb ft s² kw rpm rpm A 2 WB 115 + EK + 1 PB 115 0 73.7 3 26.5 4.18-2 3.08-2 30 2865 15,000 5 2 WB 115 + EK + 2 PB 115 200 147.5 5 44.2 5.44-2 4.01-2 30 2865 15,000 5 2 WB 115 + MK + 2 WB 115 200 147.5 2 17.7 5.51-2 4.07-2 60 2865 15,000 5 Optical Speed Sensor Each 115 Series Tandem Dynamometer has an optical speed sensor with a 60-bit pulse wheel delivered as standard. Cooling Water Consumption For all Tandem models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) tandem torque speed power curves The diagram below shows the characteristic curves for the 115 Series Tandem Dynamometers. 00 480 rpm 2865 rpm 15,000 rpm 00 Torque Power 2 WB 115 + EK + 2 PB 115 Torque (N m) 0 1 2 WB 115 + EK + 1 PB 115 2 WB 115 + 2 WB 115 2 WB 115 + EK + 2 PB 115 2 WB 115 + EK + 1 PB 115 2 WB 115 + 2 WB 115 0 00,000 Rotation Speed (rpm) Speed Limit for Tandem 115 0 1 0,000 Power (kw) 30
Magtrol WB/PB Dynamometers Chapter 1 Introduction Tandem Specifications WB/PB 115 tandem DiMensions DRIVE SIDE A WB 115 Electromagnetic tooth clutch (EK) AA BB PB 115 or WB 115 T (removable calibration arm) 5 mm (for N m)* X 500 mm (for mkp) * Use outer groove to achieve calibration in N m when using weight in kg ØD F V W E S R Inlet Inlet Q Y DD L G H CC GG EE ØK M N J P Cooling water connection Ø 15 mm ( 0.59 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model units A D E F G H J K L M N P Q R mm 500 Ø 32h6 4 54 388 685 915 Ø 13 115 35 250 3 135 260 ±0.2 2 WB 115 + EK + 1 PB 115 in 19.69 Ø 1.2598 1.2593 0.16 2.13 15.28 26.97 36.02 Ø 0.51 4.53 1.38 9.84 12.20 5.31.244.228 mm 500 Ø 32h6 4 54 388 795 25 Ø 13 115 35 250 3 135 260 ±0.2 2 WB 115 + EK + 2 PB 115 in 19.69 Ø 1.2598 1.2593 0.16 2.13 15.28 31.30 40.35 Ø 0.51 4.53 1.38 9.84 12.20 5.31.244.228 mm 500 Ø 32h6 4.5 53 388 795 25 Ø 13 115 35 250 3 135 260±0.2 2 WB 115 + MK + 2 WB 115 in 19.69 Ø 1.2598 1.2593 0.18 2.09 15.28 31.30 40.35 Ø 0.51 4.53 1.38 9.84 12.20 5.31.244.228 Model units S T V W X Y AA BB CC DD EE GG Weight mm 385 38 38 125 50 390 15 127 60 160 ±0.1 280 214 kg 2 WB 115 + EK + 1 PB 115 6.303 in 15.15 40.87 0.39 1.50 4.92 1.97 15.35 0.59 5.00 2.36 6.295 11.02 471.79 lb mm 385 38 38 125 50 500 15 127 60 160 ±0.1 390 264 kg 2 WB 115 + EK + 2 PB 115 6.303 in 15.15 40.87 0.39 1.50 4.92 1.97 19.69 0.59 5.00 2.36 6.295 15.35 582.02 lb mm 385 38 38 125 50 500 15 127 60 160±0.1 390 264 kg 2 WB 115 + MK + 2 WB 115 6.303 in 15.15 40.87 0.39 1.50 4.92 1.97 19.69 0.59 5.00 2.36 6.295 15.35 582.02 lb 31
Chapter 1 Introduction Magtrol WB/PB Dynamometers Ordering Information DynaMoMeter options Industrial Version (IS) Single WB and PB Dynamometers are also available in an industrial version which includes bearing supports, but does not provide a base plate, or torque and speed measurement. Vertical Mounting (V) Vertical Mounting is available on the Eddy-Current (WB) Dynamometer only. The vertical version has an adapted bearing fitting and its maximum speed is limited. Speed Pickup (DG) All models, including tandems, are equipped with a 60-bit optical speed sensor. On PB Dynamometers, a 600-bit or 6000-bit speed pickup (encoder) is available as an option for low speed applications. WB/PB 115 DynaMoMeter MoDels Brake 1 Powder Tandem 1 WB 115 1 PB 115 2 WB 115 + EK + 1 PB 115 2 WB 115 2 PB 115 2 WB 115 + EK + 2 PB 115 2 WB 115 + MK + 2 WB 115 ordering information If one of the listed options is desired, please follow the dynamometer model (see table above) with a dash and then the appropriate suffix (as noted in parenthesis). For example, a Model 1 PB 115 Powder Dynamometer with an optional 600-bit speed pickup is a 1 PB 115 - DG - 600. Example: 1 pb 115 - Dg - 600 Dynamometer Model Option Mechanical Rotor Blocking Device (MB) A mechanical rotor blocking device, which allows locked rotor testing, is available for the WB Dynamometer. system options and accessories ELECTRONICS SOFT- WARE MISC DESCRIPTION MODEL / PART # High Speed Programmable Dynamometer Controller DSP7000 Torque-Speed Conditioner (includes necessary cables) TSC 401/121 Power Supply (includes necessary cables) DES 411/111 High Speed Single-Phase Power Analyzer 65e High Speed Three-Phase Power Analyzer 6530 M-TEST 7 Motor Testing Software M-TEST 7 Temperature Testing Hardware HW-TTEST Dynamometer Table (with grooved table top) 005034 Transformer (24 VDC) for electromagnetic clutch of tandem dynamometers 234-311-920-011 Couplings, Thermostatic Sluice, Pressure Sensitive Switch On Request Water Cooling System for Brake On Request Calibration Weights On Request 32
Magtrol WB/PB Dynamometers Chapter 1 Introduction 1.2.5 WB/PB 15 Series WB/PB 15 Series Eddy-Current and Powder Dynamometers Features 7 Models with Maximum Torque from 140 N m to 1200 N m (3 lb ft to 885 lb ft) Braking Power: 12 kw to 140 kw Stable Braking Torque, without Shock Low Moment of Inertia Low Residual Torque Operation in Either Rotational Direction Braking Torque Measurement Included High Rotational Speed Rated Torque Available From Zero Speed (Powder Dynamometers) Integrated Optical Speed Sensor Model 2WB 15 Eddy-Current Dynamometer Description Eddy-Current Brake Dynamometers (WB series) are ideal for applications requiring high speeds and also when operating in the middle to high power range. Eddy-Current Brakes provide increasing torque as the speed increases, reaching peak torque at rated speed. The dynamometers have low inertia as a result of small rotor diameter. Brake cooling is provided by a water circulation system, which passes inside the stator to dissipate heat generated by the braking power. The water cooling in the WB provides high continuous power ratings (max. 140 kw). Powder Brake Dynamometers (PB series) are ideal for applications operating in the low to middle speed range or when operating in the middle to high torque range. Powder Brakes provide full torque at zero speed and are watercooled, allowing for power ratings up to 48 kw. Both WB and PB Dynamometers have accuracy ratings of ±0.3% to ±0.5% full scale, depending on size and system configuration. applications Mounted on test benches, WB/PB 15 Series Dynamometers allow performance and reliability testing on driving elements such as electric motors, combustion engines, servomotors, geared motors, reduction gears, pneumatic equipment, hydraulic transmission systems, starter motors, electromagnetic clutches, gas turbines and turbocompressors. Magtrol offers three types of dynamometer brakes to absorb load: Hysteresis, Eddy- Current and Magnetic Powder. Each type of Dynamometer has advantages and limitations and choosing the correct one will depend largely on the type of testing to be performed. With over 50 models to choose from, Magtrol Sales professionals are readily available to assist in selecting the proper Dynamometer to meet your testing needs. Motor testing systems Magtrol s M-TEST 7 Software is a state-of-the-art motor testing program for Windows -based data acquisition. Used with a Magtrol DSP7000 Programmable Dynamometer Controller, Magtrol M-TEST 7 Software provides the control of any Magtrol Eddy-Current or Powder Brake Dynamometer and runs test sequences in a manner best suited to the overall accuracy and efficiency of the Magtrol Motor Test System. The data that is generated by Magtrol s Motor Testing Software can be stored, displayed and printed in tabular or graphic formats, and can be easily imported into a spreadsheet. Written in LabVIEW, M-TEST 7 has the flexibility to test a majority of motor types in a variety of ways. Because of LabVIEW s versatility, obtaining data from other sources (e.g. thermocouples), controlling motor power and providing audio/visual indicators is relatively easy. Magtrol s M-TEST 7 Software is ideal for simulating loads, cycling the unit under test and motor ramping. Because it is easy to gather data and duplicate tests, the software is ideal for use in engineering labs. Tests can be programmed to run on their own and saved for future use allowing for valuable time savings in production testing and incoming/outgoing inspection. www.magtrol.com 33
Chapter 1 Introduction Magtrol WB/PB Dynamometers System Configurations WB/PB 15 single DynaMoMeter configurations The Dynamometers can be complemented by various electronic modules such as the DES 411 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP7000 High Speed Programmable Dynamometer Controller. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer Speed TSC 401 Torque-Speed Conditioner Torque Excitation DES Power Supply DSP7001 Dynamometer Controller PC M-TEST USB Magtrol also offers In-Line Torque Transducers, which employ a unique non-contact differential transformer torque measuring technology providing extremely accurate torque and speed measurement with superior electrical noise immunity. For a dynamic, high-precision system, the torque transducer can be mounted in line between the unit under test and the dynamometer. Eddy-Current (WB) OR Powder Brake (PB) Dynamometer TM Torque Transducer Speed Torque Excitation TSC 401 Torque-Speed Conditioner DES Power Supply DSP7002 Dynamometer Controller PC M-TEST USB tandem configuration Magtrol offers Eddy-Current and Powder Dynamometers mounted in tandem. In tandem, the unique features of each type of dynamometer brake are utilized, allowing the unit under test to be applied with nominal braking torque from zero speed to maximum rotation. The Tandem Dynamometers are available on a number of WB/PB combinations. Powder Brake Dynamometer (PB) Clutch (EK) Eddy-Current Brake Dynamometer (WB) TSC 401 Torque/Speed Conditioner DES Power Supply Torque Excitation Transformer Speed Torque Excitation TSC 401 Torque-Speed Conditioner DES Power Supply DSP7002 Dynamometer Controller PC M-TEST USB 34 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Specifications WB 15 eddy-current DynaMoMeter operating principles The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 15 Series is particularly intended for motors which rotate at high speeds, up to 7500 rpm. The braking torque depends on the rotation speed. WB DynaMoMeter ratings * Voltage at 20 C is 45 volts. Drag Torque De-energized Rated Power Rated Speed Max. Speed Excitation Current* Model Rated Torque Nominal Input Inertia N m lb ft N m lb in kg m² lb ft s² kw rpm rpm A 1 WB 15 140 3 1.4 12.3 5.00-2 3.68-2 35 2390 7500 4 2 WB 15 280 206 2.8 24.7 1.00-1 7.37-2 70 2390 7500 7.5 3 WB 15 420 309 4.2 37.1 1.50-1 1. -1 5 2390 7500 4 WB 15 560 413 5.6 49.5 2.00-1 1.47-1 140 2390 7500 12 Optical Speed Sensor Each 15 Series WB Dynamometer has an optical speed sensor with a 60-bit pulse wheel delivered as standard. Cooling Water Consumption For all WB models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) WB torque speed power curves The diagram below shows the characteristic curves for the 15 Series Eddy-Current Dynamometers. 00 2390 rpm 7500 rpm 00 Torque (N m) 0 4 WB 15 (TORQUE) 3 WB 15 (TORQUE) 2 WB 15 (TORQUE) 1 WB 15 (TORQUE) 4 WB 15 (POWER) 3 WB 15 (POWER) 2 WB 15 (POWER) 1 WB 15 (POWER) 1 0 00 Rotation Speed (rpm) 0 1,000 Speed Limit for WB Power (kw) 35
Chapter 1 Introduction Magtrol WB/PB Dynamometers Specifications PB 15 powder DynaMoMeter operating principles The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed. The element to be tested can be loaded at standstill to determine the starting torque. pb DynaMoMeter ratings * Voltage at 20 C is 45 volts. Drag Torque De-energized Rated Power Rated Speed Max. Speed Excitation Current* Model Rated Torque Nominal Input Inertia N m lb ft N m lb in kg m² lb ft s² kw rpm rpm A 1 PB 15 300 221 6 53 5.40-2 3.98-2 12 382 2000 4 2 PB 15 600 442 12 6 1.08-1 7.96-2 24 382 2000 7.5 4 PB 15 1200 885 24 212 2.16-1 1.59-1 48 382 2000 12 Optical Speed Sensor Each 15 Series PB Dynamometer has an optical speed sensor with a 60-bit pulse wheel delivered as standard. For better speed resolution in low speed applications, Magtrol offers a 600-bit or 6000-bit speed pickup (encoder) as an option. Cooling Water Consumption For all PB models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) pb torque speed power curves The diagram below shows the characteristic curves for the 15 Series Powder Dynamometers.,000 382 rpm 2000 rpm 0 4 PB 15 (TORQUE) 00 2 PB 15 (TORQUE) Torque (N m) 1 PB 15 (TORQUE) 0 0 00 4 PB 15 (POWER) 2 PB 15 (POWER) 1 PB 15 (POWER) Speed Limit for PB 1 0.1,000 Power (kw) Rotation Speed (rpm) 36 MAGTROL
Magtrol WB/PB Dynamometers Chapter 1 Introduction Specifications WB/PB 15 single DynaMoMeter DiMensions Center hole DIN 332-D M16 A B C Tapping for calibration arm T (removable calibration arm) X 5 mm (for N m)* 500 mm (for kpm) ØU * Use outer groove to achieve calibration in N m when using weight in kg ØD F V E W S R Inlet Z Y TT ØK Q L DD G H J M N P SS Cooling water connection Ø 22 mm ( 0.87 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model units A B C D E F G H J K L M N P mm 544 370 150 Ø 42g6-53 68 490 590 650 Ø 15 30 75 250 400 1 WB 15 / 1 PB 15 in 21.42 14.57 5.91 Ø 1.6531-2.09 2.68 19.29 23.23 25.59 Ø 0.59 1.18 2.95 9.84 15.75 1.6526 mm 694 520 300 Ø 42g6 22 68 490 590 650 Ø 15 30 75 250 400 2 WB 15 / 2 PB 15 in 27.32 20.47 11.81 Ø 1.6531 0.87 2.68 19.29 23.23 25.59 Ø 0.59 1.18 2.95 9.84 15.75 1.6526 mm 844 670 450 Ø 42g6-78 68 840 940 00 Ø 15 30 75 250 400 3 WB 15 in 33.23 26.38 17.72 Ø 1.6531-3.07 2.68 33.07 37.01 39.37 Ø 0.59 1.18 2.95 9.84 15.75 1.6526 mm 994 820 600 Ø 42g6-3 68 840 940 00 Ø 15 30 75 250 400 4 WB 15 / 4 PB 15 in 39.13 32.28 23.62 Ø 1.6531-0.12 2.68 33.07 37.01 39.37 Ø 0.59 1.18 2.95 9.84 15.75 1.6526 Model units Q R S T U V W X Y Z DD SS TT Weight mm 1 300 ±0.2 498 30 Ø 395 12 48 220 35 265 80 75 37 185 kg 1 WB 15 / 1 PB 15 11.819 in 4.33 19.61 40.55 Ø 15.55 0.47 1.89 8.66 1.38.43 3.15 2.95 1.46 407.86 lb 11.803 mm 1 300 ±0.2 498 30 Ø 395 12 48 220 35 190 80 75 37 290 kg 2 WB 15 / 2 PB 15 11.819 in 4.33 19.61 40.55 Ø 15.55 0.47 1.89 8.66 1.38 7.48 3.15 2.95 1.46 639.34 lb 11.803 mm 1 300 ±0.2 498 30 Ø 395 12 48 220 35 290 80 75 37 385 kg 3 WB 15 11.819 in 4.33 19.61 40.55 Ø 15.55 0.47 1.89 8.66 1.38 11.42 3.15 2.95 1.46 848.78 lb 11.803 mm 1 300 ±0.2 498 30 Ø 395 12 48 220 35 215 80 75 37 520 kg 4 WB 15 / 4 PB 15 11.819 in 4.33 19.61 40.55 Ø 15.55 0.47 1.89 8.66 1.38 8.46 3.15 2.95 1.46 1146.40 lb 11.803 37 MAGTROL
Chapter 1 Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 15 tandem operating principles Because the characteristics of the WB and PB dynamometers are complementary, Magtrol is able to offer them mounted in a tandem setup. Each dynamometer (WB and PB) can autonomously operate according to its own characteristics. An electromagnetic clutch is needed for this application which automatically switches off at the maximum speed of the PB Powder Dynamometer and automatically switches on at zero speed. tandem DynaMoMeter ratings * Voltage at 20 C is 45 volts. Drag Torque De-energized Rated Power Rated Speed Max. Speed Excitation Current* Model Rated Torque Nominal Input Inertia N m lb ft N m lb in kg m² lb ft s² kw rpm rpm A 2 WB 15 + EK + 1 PB 15 300 221 8.8 77 1.77-1 1.31-1 70 2390 7500 7.5 2 WB 15 + EK + 2 PB 15 600 442 14.8 130 2.31-1 1.70-1 70 2390 7500 7.5 2 WB 15 + EK + 4 PB 15 1200 885 26.8 237 3.39-1 2.50-1 70 2390 7500 12 4 WB 15 + EK + 1 PB 15 300 221 11.6 2 2.77-1 2.04-1 140 2390 7500 12 4 WB 15 + EK + 2 PB 15 600 442 17.6 155 3.31-1 2.44-1 140 2390 7500 12 4 WB 15 + EK + 4 PB 15 1200 885 29.6 261 4.39-1 3.23-1 140 2390 7500 12 Optical Speed Sensor Each 15 Series Tandem Dynamometer has an optical speed sensor with a 60-bit pulse wheel delivered as standard. Cooling Water Consumption For all Tandem models: 30 l/kwh at t = 30 C (Metric) 8 gal/kwh at t = 86 F (US) tandem torque speed power curves The diagrams below show the characteristic curves for the 15 Series Tandem Dynamometers. 000 382 rpm 2390 rpm 7500 rpm 00,000 382 rpm 2390 rpm 7500 rpm 00 2 WB 15 + EK + 4 PB 15 (TORQUE) 4 WB 15 + EK + 4 PB 15 (TORQUE) 00 0 00 0 2 WB 15 + EK + 2 PB 15 (TORQUE) 4 WB 15 + EK + 2 PB 15 (TORQUE) Torque (N m) 0 2 WB 15 + EK + 1 PB 15 (TORQUE) 2 WB 15 + EK + 4 PB 15 (POWER) 2 WB 15 + EK + 2 PB 15 (POWER) 2 WB 15 + EK + 1 PB 15 (POWER) Speed Limit for Tandem 15 1 Power (kw) Torque (N m) 0 4 WB 15 + EK + 1 PB 15 (TORQUE) 4 WB 15 + EK + 4 PB 15 (POWER) 4 WB 15 + EK + 2 PB 15 (POWER) 4 WB 15 + EK + 1 PB 15 (POWER) Speed Limit for Tandem 15 1 Power (kw) 0 00,000 0 00,000 Rotation Speed (rpm) Rotation Speed (rpm) 38
Magtrol WB/PB Dynamometers Chapter 1 Introduction Tandem Specifications WB/PB 15 tandem DiMensions DRIVE SIDE A WB 15 Electromagnetic tooth clutch (EK) AA BB PB 15 T (removable calibration arm) X 5 mm (for N m)* 500 mm (for mkp) * Use outer groove to achieve calibration in N m when using weight in kg ØD F V W S Inlet Inlet R Y Q DD L H G CC JJ J GG HH M EE ØK N P Cooling water connection Ø 22 mm ( 0.87 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model units A D F G H J K L M N P Q R S mm 694 Ø 42g6 68 355 371 1253 Ø 17 70 40 460 530 200 390 ±0.2 588 2 WB 15 + EK + 1 PB 15 in 27.32 Ø 1.6531 1.6526 2.68 13.98 14.61 49.33 Ø 0.67 2.76 1.57 18.11 20.87 7.87 15.362 15.346 23.15 mm 694 Ø 42g6 68 355 371 1403 Ø 17 70 40 460 530 200 390 ±0.2 588 2 WB 15 + EK + 2 PB 15 in 27.32 Ø 1.6531 1.6526 2.68 13.98 14.61 55.24 Ø 0.67 2.76 1.57 18.11 20.87 7.87 15.362 15.346 23.15 mm 694 Ø 42g6 68 355 521 1703 Ø 17 70 40 460 530 200 390 ±0.2 588 2 WB 15 + EK + 4 PB 15 in 27.32 Ø 1.6531 1.6526 2.68 13.98 20.51 67.05 Ø 0.67 2.76 1.57 18.11 20.87 7.87 15.362 15.346 23.15 mm 994 Ø 42g6 68 655 521 1553 Ø 17 70 40 460 530 200 390 ±0.2 588 4 WB 15 + EK + 1 PB 15 in 39.13 Ø 1.6531 1.6526 2.68 25.79 20.51 61.14 Ø 0.67 2.76 1.57 18.11 20.87 7.87 15.362 15.346 23.15 mm 994 Ø 42g6 68 655 521 1703 Ø 17 70 40 460 530 200 390 ±0.2 588 4 WB 15 + EK + 2 PB 15 in 39.13 Ø 1.6531 1.6526 2.68 25.79 20.51 67.05 Ø 0.67 2.76 1.57 18.11 20.87 7.87 15.362 15.346 23.15 mm 994 Ø 42g6 68 655 590 2003 Ø 17 70 40 460 530 200 390 ±0.2 588 4 WB 15 + EK + 4 PB 15 in 39.13 Ø 1.6531 1.6526 2.68 25.79 23.23 78.86 Ø 0.67 2.76 1.57 18.11 20.87 7.87 15.362 15.346 23.15 Model units T V W X Y AA BB CC DD EE GG HH JJ Weight mm 30 12 48 225 125 544 14 260 117 270 ±0.1 405 371 371 485 kg 2 WB 15 + EK + 1 PB 15.634 in 40.55 0.47 1.89 8.86 4.92 21.42 0.55.24 4.61 15.94 14.61 14.61.626 69.24 lb mm 30 12 48 225 125 694 14 260 117 270 ±0.1 555 471 421 590 kg 2 WB 15 + EK + 2 PB 15.634 in 40.55 0.47 1.89 8.86 4.92 27.32 0.55.24 4.61 21.85 18.54 16.57.626 1300.73 lb mm 30 12 48 225 125 994 14 260 117 270 ±0.1 855 521 521 820 kg 2 WB 15 + EK + 4 PB 15.634 in 40.55 0.47 1.89 8.86 4.92 39.13 0.55.24 4.61 33.66 20.51 20.51.626 1807.79 lb mm 30 12 48 225 125 544 14 260 117 270 ±0.1 405 471 421 715 kg 4 WB 15 + EK + 1 PB 15.634 in 40.55 0.47 1.89 8.86 4.92 21.42 0.55.24 4.61 15.94 18.54 16.57.626 1576.31 lb mm 30 12 48 225 125 694 14 260 117 270 ±0.1 555 521 521 820 kg 4 WB 15 + EK + 2 PB 15.634 in 40.55 0.47 1.89 8.86 4.92 27.32 0.55.24 4.61 21.85 20.51 20.51.626 1807.79 lb mm 30 12 48 225 125 994 14 260 117 270 ±0.1 855 590 683 50 kg 4 WB 15 + EK + 4 PB 15.634 in 40.55 0.47 1.89 8.86 4.92 39.13 0.55.24 4.61 33.66 23.23 26.89.626 2314.85 lb 39 MAGTROL
Chapter 1 Introduction Magtrol WB/PB Dynamometers Ordering Information DynaMoMeter options Industrial Version (IS) Single WB and PB Dynamometers are also available in an industrial version which includes bearing supports, but does not provide a base plate, or torque and speed measurement. Vertical Mounting (V) Vertical Mounting is available on the Eddy-Current (WB) Dynamometer only. The vertical version has an adapted bearing fitting and its maximum speed is limited. Speed Pickup (DG) All models, including tandems, are equipped with a 60-bit optical speed sensor. On PB Dynamometers, a 600-bit or 6000-bit speed pickup (encoder) is available as an option for low speed applications. Mechanical Rotor Blocking Device (MB) A mechanical rotor blocking device, which allows locked rotor testing, is available for the WB Dynamometer. WB/PB 15 DynaMoMeter MoDels Eddy-Current Powder Tandem 1 WB 15 1 PB 15 2 WB 15 + EK + 1 PB 15 2 WB 15 2 PB 15 2 WB 15 + EK + 2 PB 15 3 WB 15 4 PB 15 2 WB 15 + EK + 4 PB 15 4 WB 15 4 WB 15 + EK + 1 PB 15 4 WB 15 + EK + 2 PB 15 4 WB 15 + EK + 4 PB 15 ordering information If one of the listed options is desired, please follow the dynamometer model (see table above) with a dash and then the appropriate suffix (as noted in parenthesis). For example, a Model 1 PB 15 Powder Dynamometer with an optional 6000-bit speed pickup is a 1 PB 15 - DG - 6000. Example: 1 pb 15 - Dg - 6000 Dynamometer Model Option system options and accessories ELECTRONICS SOFT- WARE MISC DESCRIPTION MODEL / PART # High Speed Programmable Dynamometer Controller DSP7000 Torque-Speed Conditioner (includes necessary cables) TSC 401/121 Power Supply (includes necessary cables) DES 411/121 High Speed Single-Phase Power Analyzer 65e High Speed Three-Phase Power Analyzer 6530 M-TEST 7 Motor Testing Software M-TEST 7 Temperature Testing Hardware HW-TTEST Dynamometer Table for (with grooved table top) 1 & 2 WB/PB 15 Series Dynamometers 005476 Water Cooling Kit for DES 411/121 Power Supply (for 2, 3 and 4 WB or 2 and 4 PB 15) 234-311-900-011 Transformer (24 VDC) for electromagnetic clutch of tandem dynamometers 234-311-920-011 Couplings, Thermostatic Sluice, Pressure Sensitive Switch On Request Water Cooling System for Brake On Request Calibration Weights On Request 40
2. Installation / Mounting The dynamometer lifespan (before overhauling) may vary from a few months to a few decades, depending on the application, but equally depending on the way it has been mounted. By mounting the dynamometer as described in the following sections, the operating life as well as the measuring precision of the unit may be increased considerably. 2.1 Locking the Dynamometer for Transport Dynamometers are equipped with a load cell for measuring the torque generated by the tested system on the brake. The load measuring cell is a precision instrument which must be protected from shocks during transport in order to guaranty the measurement repeatability. Therefore, all Magtrol WB/PB Dynamometers are fitted with a locking system in order to protect the load cell during transport. The dynamometer can only be used after removing that model's specific locking device. The unlocking procedure is described for each dynamometer model in sections 2.1.1 though 2.1.5. Note: All dynamometers, except the WB/PB 2.7 Series, have to be mounted on the test bench prior to the removal of the load cell protection device. This prevents damage to the load cell transducer during dynamometer installation. Caution: To prevent damage to the load cell, the dynamometer must be locked before moving or shipping. 41
Chapter 2 Installation / Mounting Magtrol WB/PB Dynamometers 2.1.1 WB/PB 2.7 Series Before mounting any WB/PB 2.7 Series Dynamometer to the test bench, the load cell must first be unlocked. The shipping/restraining pin of the locking system is found on the lower part of the brake. Proceed as follows and refer to figure 2 1 to unlock the dynamometer: 1. Loosen the fixing screw. 2. Remove the shipping/restraining pin, and re-insert it with the thinner part inside. 3. Tighten the screw. Cooling water inlet Figure 2 1 WB/PB 2.7 Load Cell Locking System 42
Magtrol WB/PB Dynamometers Chapter 2 Installation / Mounting 2.1.2 WB/PB 43 Series WB/PB 43 Series Dynamometers are fitted with a connecting screw between the stator assembly and the load cell. After installing the dynamometer on a test bench, fasten the connecting screw to get the load cell operational. Proceed as follows and refer to figure 2 2: Caution: While tightening the screw, keep the wrench parallel to the vertical connecting rod to avoid load cell overload. 1. Insert the hexagon cap screw supplied with the dynamometer into the rod end. 2. Fasten the screw. Note: The overload protection screws and nuts and are adjusted at the factory (refer to Chapter 6 Calibration for possible adjustments). Figure 2 2 WB/PB 43 Load Cell Locking System 43
Chapter 2 Installation / Mounting Magtrol WB/PB Dynamometers 2.1.3 WB/PB 65 Series WB/PB 65 Series Dynamometers are fitted with a mechanical stator assembly locking device protecting the load cell during transport. After installing the dynamometer on the test bench, proceed as follows and refer to figure 2 3 to unlock the system: 1. Loosen the two nuts. 2. Unscrew the two screws with three turns. 3. Tighten the two nuts. Note: The screws and nuts for overload protection and are adjusted at the factory (refer to Chapter 6 Calibration for possible adjustments). Figure 2 3 WB/PB 65 Load Cell Locking System 44
Magtrol WB/PB Dynamometers Chapter 2 Installation / Mounting 2.1.4 WB/PB 115 Series WB/PB 115 Series Dynamometers are fitted with a mechanical stator assembly locking device protecting the load cell during transport. After installing the dynamometer on the test bench, proceed as follows and refer to figure 2 4 to unlock the system: 1. Loosen the two nuts. 2. Unscrew the two screws with three turns. 3. Tighten the two nuts. Note: The screws and nuts for overload protection and are adjusted in the factory (refer to Chapter 6 Calibration for possible adjustments). Figure 2 4 WB/PB 115 Load Cell Locking System 45
Chapter 2 Installation / Mounting Magtrol WB/PB Dynamometers 2.1.5 WB/PB 15 Series WB/PB 15 Series Dynamometers are fitted with a mechanical stator assembly locking device protecting the load cell during transport. After installing the dynamometer on the test bench, proceed as follows and refer to figure 2 5 to unlock the system: 1, Screw the nuts on each side of the dynamometer with three turns. 2, Unscrew the nuts on each side of the dynamometer until they touch the nuts. A minimum clearance of 0.4 mm between the nuts and the dynamometer locking device is requested. Note: The WB/PB 15 Series Dynamometers are not fitted with overload protection systems. The load cell is strong enough to cope with any overload occurring during normal dynamometer use. Figure 2 5 WB/PB 15 Load Cell Locking System Warning: When the dynamometer is locked during transport, the load cell should not be under mechanical stress (compression or traction). 46
Magtrol WB/PB Dynamometers Chapter 2 Installation / Mounting 2.2 Mounting the dynamometer to the test bench The dynamometer should be placed on a stable horizontal base plate preferably constructed of cast iron, steel or aluminum in order to eliminate vibrations to the greatest extend possible. Flatness defects should not exceed 0.05 mm. In addition, the dynamometer frame must withstand the torque transmitted by the dynamometer without deformation. Note: Magtrol offers standard and custom dynamometer tables specially designed to support the entire range of Magtrol dynamometers. The dynamometer is mounted onto the bench by means of four screws. The size of these screws depends on the dynamometer model. Tandem dynamometers require stronger screws than single dynamometers. Refer to the data sheet of the corresponding dynamometer (see Section 1.2) for additional information on the screw type and size. 2.2.1 Aligning the dynamometers on the test bench The proper alignment of the dynamometer with the motor under test is very important. The higher the speed of the test, the more care must be taken when performing the alignment. The maximum tolerated misalignment depends on the selected coupling. With high-speed Eddy-current dynamometers (WB-HS), 0.01 mm may be tolerated. With magnetic powder dynamometers (PB) operating at lower maximum speeds, a misalignment of up to 0.1 mm is acceptable. 2.2.2 Vibrations induced by the test bench Vibrations generate premature wear of the bearings. Since modifying the motor under test in order to prevent any vibration is not feasible, measures will have to be taken to forestall any damage to the dynamometer. In order to evaluate motors producing vibrations (for instance, combustion engines), the motors must be mounted on a heavyweight base plate equipped with vibration mounts. By doing this, the vibrations transmitted from the motor to the dynamometer will be reduced considerably. Height differences due to varying motor loading must be taken into account. The vibration mounts should not be compressed, creating a misalignment between the motor and the dynamometer. This would affect the measurement results and damage the dynamometer. Caution: Operating at the resonance frequency of the measuring chain will severely damage the dynamometer. 47
Chapter 2 Installation / Mounting Magtrol WB/PB Dynamometers 2.3 Couplings The dynamometer couplings used with the motor under test is an important factor to take into consideration. In fact, a coupling which is not correctly specified for the application will lead to measuring errors and premature wear of the dynamometer. Given the fact that the dynamometer is a precision measuring device, high quality couplings should be used. Couplings with insufficient torsion stiffness will generate unwanted sinusoidal signals on the original measuring signal. The coupling must be dynamically balanced (Q1 for WB Series Dynamometers and Q2.5 for PB Series Dynamometers). This balancing must compensate for maximum tolerated misalignment between the motor under test and the dynamometer. For all Magtrol WB/PB Series Dynamometers, it is advisable to employ a twin (dual disc) coupling clamped onto the shaft keys (as shown in the figure below). Figure 2 6 Couplings Using Key Clamping By using this method, no slipping will damage the coupling or the dynamometer shaft. With small dynamometers such as the WB/PB 2.7 and 43 Series Dynamometers, mounting takes place by tightening onto a smooth shaft, or using a self-centering coupling with two tightening screws. Couplings must dampen axial and radial vibration and isolate the dynamometer from vibrations generated by the tested unit, particularly in case of gas engines. With high-speed Eddy-current (WB-HS) Dynamometers, consult your Magtrol representative for the best suited coupling for your specific application. Note: With more than 50 years of experience in the field of motor testing, Magtrol is your best partner to determine the best suited dynamometer for any given application. 48
Magtrol WB/PB Dynamometers Chapter 2 Installation / Mounting 2.4 Measuring range As with most transducers, dynamometers should be operated in the upper part of their measuring range, between % and 0% of their rating. 2.5 Drag torque Magtrol dynamometers are characterized by a low drag torque: approximately 1% of the rated torque for WB Series Dynamometers and approximately 2% for PB Series Dynamometers. Refer to the corresponding data sheets (see Section 1.2) for the maximum drag torque values of each model. Drag torque (which is measured by the dynamometer) is generated by friction originating from the bearings, the contact between the powder and the rotor unit in magnetic powder brakes, as well as all other mechanical contacts. 2.6 Tolerated radial and axial forces Note: Any radial or axial force exercised on a dynamometer causes premature wear of the bearings, as well as an increase of the drag torque. The following table shows the maximum axial and radial forces the WB/PB Series Dynamometer can support without being damaged: Standard version High-speed version (HS)* Series F axial max [N] F radial max [N] F axial max [N] F radial max [N] WB/PB 2.7 20 5 4 2.5 WB/PB 43 40 30 8 15 WB/PB 65 200 60 40 30 WB/PB 115 300 200 60 0 WB/PB 15 N/A N/A N/A N/A * Only Eddy-current (WB) Dynamometers have, as an option, a high-speed version. For WB-HS Dynamometers, the limit is lower in order to protect the high-performance bearings. Magtrol offers, for the same reason, a specially adapted high-speed coupling. By applying a radial or axial force on the dynamometer, the bearings are subjected to different stresses. This hinders them from rotating freely and generates torque on the measuring line. The side load of the measuring line is detected by the dynamometer cell. This is not an offset but a real torque, normally measured. Thus, the zero on the electronics must not be set when the dynamometer is mechanically coupled. 49
Chapter 2 Installation / Mounting Magtrol WB/PB Dynamometers By slightly moving the dynamometer stator backwards and forwards when the motor is stopped, the side load disappears. If uncoupling the dynamometer makes the drag torque disappear, either the coupling will have to be changed or it will have to be realigned with the motor. Caution: The dynamometer must be uncoupled prior to calibration. (Refer to Chapter 6 Calibration for more details.) 2.7 Connecting the cooling system Proper cooling of the dynamometer is essential to ensure a long operating life and accurate measuring results. All Magtrol WB/PB Series Dynamometers* are water-cooled to guaranty the best possible heat dissipation. * PB 2.7 Series Dynamometers are available with (K) or without a cooling circuit. Note: The cooling tubes must have an inside diameter in accordance with the indications on the corresponding dynamometer data sheets (see Section 1.2). They must be fitted to the dynamometer using a metal ring. Also, check for correct water flow direction. The cooling water input is marked Cooling water inlet on the dynamometer housing. The other nipple is used for the water outlet. Check for correct connections. For more information on the dynamometer's cooling system, refer to Chapter 3 Cooling. 2.8 Protective Systems Warning! ALL ROTATING PARTS MUST BE FITTED WITH A PROTECTIVE SYSTEM TO ENSURE THAT THE USER, AS WELL AS ALL OTHER SURROUNDING people and OBJECTS, WILL NOT BE INJURED OR DAMAGED AS A RESULT OF THE MOTOR under test BECOMING BLOCKED, A TORQUE OVERLOAD, OR ANY OTHER potential PROBLEM. The following precautions concerning protective equipment of the drive train must be observed: Protective elements must prevent access to moving parts (during test). Protective elements must cover all parts which can cause crushing or cutting, and protect against projections of parts having become loose. Avoid attaching protective elements to rotating parts. Keep protective elements at a sufficient distance away from rotating parts. 50
Magtrol WB/PB Dynamometers Chapter 2 Installation / Mounting Figure 2 7 shows a good example of a protective system. All parts of the bench are accessible, but the covers prevent any risk to the user when closed. Figure 2 7 Example of Protective System 51