Linear motors - Main features

Transcription

1 Motori lineari ML - Main features The main difference between rotary and linear motors is that linear produce a force and rotary produce a torque. Their operation is identical to that of rotary motors from which they are derived. Use of this type of actuator is very convenient in automatic motion where it is necessary to drive the linear motion directly eliminating the motion conversion parts such as the belts, cogs, or lead-screws. This is why they are commonly called direct drive: they are directly linked to the load. Without the conversion parts, motion is better and more accurate thanks to the stiffness, lower inertial mass, no backlash and the elasticity of the system. The main parts of a linear motor are the stator (primary) where the coils and temperature sensor are housed, and the slider (secondary) where the permanent magnets are located. A removable encoder with M1 connectors for robotic applications completes the system. An extruded bar is used for heat dissipation as well as to facilitate fixing thanks to the T-groves and the ISO dimensioned cylinders. Magnetic slider Motor starter Encoder sensor Application example LV... LV... LVP

2 - Technology The working principle of the cylindrical linear motor is the same as that of a standard synchronous brushless motor. Based on the application, the stator, where the coils are located, can remain still and move the slider with magnets inside, or vice versa, the slider can be fixed and the stator move. Magnets are positioned in a North-South sequence in order permit the measurement system, located on the stator, to verify the reciprocal position. These motors can be controlled using common drives for traditional brushless motors. These converters control the current to the primary in order to obtain a 90 electric offset with the magnetic poles, maximising the thrust. The alternating polarity of the magnets produces a force called COGGING which can easily be eliminated by special functions (feed-forward) integrated in the drives. - Advantages No gear box. No belt and pulley. No periodic lubrication. No periodic adjustments. No rotary drive shaft. No backlash. No mechanical wear. Direct thrust motor. Simple mechanical assembly. Few moving parts. No internal moving parts. Less mass to move. Greater efficiency. Lower inertia. Easy replacement. Moving part (stator or slider) selection based on the desired application. High acceleration. High speed. Low weight. Zero axial moment. 81

3 Motor stator 3 phase motor delta connection. PTC positive temperature coefficient component. M1 or flex cable connection. High-slidability rod wiper. Operating temperature: C. Maximum motor temperature: 110 C. 3-PHASE MOTOR - Main data ML70X4 ML70X6 ML300X4 (*) ML300X6 (*) Motor length 199 mm 70 mm 199 mm 70 mm Three-phase coil units Pole pitch 3.4 mm 3.4 mm 3.4 mm 3.4 mm Motor external diameter Ø mm Ø mm Ø mm Ø mm Mass 73 g 384 g 73 g 384 g BUS voltage 7 Vdc 7 Vdc 3 Vdc 3 Vdc Peak force 98.1 N 10.4 N 117 N N Peak current (110 C) 7.7 A. A 3.1 A.1 A Force constant 1.7 N/A 0.3 N/A 34.4 N/A 6.7 N/A Continuous force 0.6 N 36.9 N 18.3 N 37.6 N Continuous current (110 C) 1.6 A 1.8 A 0. A 0.6 A Maximum speed 6 m/s 4 m/s 9 m/s.7 m/s Phase resistance at C/110 C 4.8/6. Ohm 7.1/9.6 Ohm 48.6/67. Ohm 77./10.1 Ohm Phase inductance 1. mh 1.9 mh 11. mh 0. mh BEMF constant 11.6 Vs/m 18. Vs/m 36.3 Vs/m 7.7 Vs/m Thermal resistance 3.3 C/W 1.8 C/W.8 C/W 1. C/W Max phase temperature 110 C 110 C 110 C 110 C PTC value 3K3 C 3K3 C 3K3 C 3K3 C PTC max voltage 40 Vdc Connection M1x1 M1x1 Cavo Cable Cavo Cable Environmental Degree IP67 IP67 IP67 IP67 Reference standards EN EC + IS1 EN EN EC + IS1 EN EN

4 Electrical connections Phase Color PIN 1 U Brown U1 W 1 PIN 4 V Black 4 PIN 3 W Blue 3 PIN PTC White PIN PTC Grey V W1 U V1 Dimensions (mm) 8.4 X Ø M1x1 8. Ø B 4 X ML70X4 ML300X4 ML70X6 ML300X B 83

5 Transducers and sensors Position transducers, ABZ or SIN/COS versions. M1 8 poles standard connection. Direct reading from the magnetic field of the slider. The ABZ version can also be provided with Hall sensors for initial timing. Sensors and transducers can be fitted on either side of the motor. SE9ABZ1 SE9SIN1 (*) SE9HALL1 Circuit output Output signal Sensor power supply Current consumption Working speed Operating temperature Resolution Repeatability Pole pitch Cycles per revolution (CPR) Pulses / Sinusoids per revolution (PPR) Connection Pin 1 (White) Pin (Brown) Pin 3 (Green) Pin 4 (Yellow) Pin (Grey) Pin 6 (Pink) Pin 7 (Blue) Pin 8 (Red) Power supply LED ON output LED NO magnetic field LED Materials IP rating Reference standards (*) Optional voltage Reference standards ABZ SIN/COS 3 HALL RS-4 1 Vss Open C. Vdc 0 ma ma ma 4 m/s C ±0 μm - 60 ±0 μm 3.4 mm imp. 1 sin. - 8poles Z - Z - N/C + Vdc + Vdc + Vdc B - COS - N/C B + COS + HALL A - SIN - N/C A + SIN + HALL 1 GND GND GND Z + Z + HALL 3 Green Green Green Yellow - - Red - - PA66+FV30% - Nichel OT63 - Epoxy resin IP67 CE 4 Vdc EN EC + IS1; EN (*) Under construction M1x Ø 17.7 R

6 Feedback signals SE9ABZ A+ A- A+ B+ B- B+ Z+ Z- Z+ 90 SE9SIN1 COS 1V SIN Z -1V SE9HALL Mechanical pitch Electrical degrees HALL HALL 1 HALL HALL HALL HALL 3 8

7 Magnetic slider Neodymium magnets. Ø1 mm stainless steel pipe. M internal cap thread and 1 mm wrench. ML1X10L18 ML1X13L71 ML1X16L3 ML1X0L39 Standard length (X) 18 mm 71 mm 3 mm 39 mm Mass 190 g 3 g 8 g 30 g Number of magnets Pole pitch 3.4 mm 3.4 mm 3.4 mm 3.4 mm ML1X7L19 ML1X33L6 ML1X39L730 ML1X44L80 Standard length (X) 19 mm 6 mm 730 mm 80 mm Mass 460 g 60 g 6 g 73 g Number of magnets Pole pitch 3.4 mm 3.4 mm 3.4 mm 3.4 mm N N S S N N Dimensions (mm) X Ø1 10 Ø M x1 86

8 Connectors Motor, transducers and feedback sensors can be connected by means of axial and angular connectors with flexible cable for moving applications. 0 axial CFGM100P CFGM1008P 90 angular CFGM190P CFGM1908P Application Contact type Number of contacts Standard length Material Stranding Section - AWG Electrical resistance Conductor diameter Conductor compound Shield Shield type Cable diameter Cable material Cable color Features Min. bending radius Reference standards Color layout 1 Brown White 3 Blue 4 Black Gray Motor Encoder Female 8. m Bare Copper 4 x 0.10 mm 3 x 0.10 mm 0.34 mm / 0. mm / 4 < 8.16 Ω/km < Ω/km Ø 1.30 mm Ø 1.1 mm PP Fully shielded Braid Ø 6.3 mm ±0. mm PUR RAL 900 Oil, Hydraulic fluide and UV resistant, Silicone, Pb, Cd, Hg, FCKW and Halogen free 63 mm 00/9/CE, EN , IEC White Brown 3 Green 4 Yellow Gray 6 Pink 7 Blue 8 Red CFGM100P CFGM1008P CFGM190P CFGM1908P 87

9 Driver The Gimatic linear motor is compatible with most drives on the market. The following is a list of some commercial drives tested. BRAND LinMot Copley Hitachi Advanced Motion Control Technosoft CODE B1100; E1100 Accelnet Servo AD DPRALTE-00B080 IDM680 Janaer Ecovario 114 BR Automation Elmo Servotronix Apocos Harmonica Drive LVD drive MaxonMotor Epos Drive 70/10 LeadShine ACS806 Aerotech Ensemble HPE 10 Baldor / ABB Galil Infranor HDT Siemens Selema MicroFlex CDS-3310 XtraPlusPac Digifox SINAMICS S10 Micro ECO Example of a typical architecture Mains power Trasformer Rectifier Controller Converter Linear motor Load Position sensor 88

10 Order code Motor 70 ML 300 * 4 X 6 Linear motor mm external diameter Voltage bus Number of coils Magnetic slider ML 1 X * 44 L ML series magnetic slider 1mm external diameter Number of magnets Total length ABZ Transducers and sensors Sensor SIN * SE 9 HALL 1 (*) Under construction M1 connector Version Vdc power supply Connector 00 CF G M Female connector Metal ring nut M1 connector Axial cable output Number of poles Cable length (x0.1 m) Code combination 70 Vdc X 4 70 Vdc X Vdc X Vdc X 6 ML ML70X4 ML70X6 ML300X4 ML300X6 ABZ ML70X4-ABZ ML70X6-ABZ ML300X4-ABZ ML300X6-ABZ ABZ+HALL ML70X4-ABZ-HALL ML70X6-ABZ-HALL ML300X4-ABZ-HALL ML300X6-ABZ-HALL SIN ML70X4-SIN ML70X6-SIN ML300X4-SIN ML300X6-SIN SIN+HALL ML70X4-SIN-HALL ML70X6-SIN-HALL ML300X4-SIN-HALL ML300X6-SIN-HALL ML1 ML1X10L18 ML1X13L71 ML1X16L3 ML1X0L39 ML1 ML1X7L19 ML1X33L6 ML1X39L730* ML1X44L