Dev Bhoomi Institute Of Technology LABORATORY Department of Electrical And Electronics Engg. Electro-mechanical Energy Conversion II
|
|
- Jerome Chambers
- 5 years ago
- Views:
Transcription
1 REV. NO. : REV. DATE : PAGE: 1 Electro-mechanical Energy Conversion II 1. To perform no load and blocked rotor tests on a three phase squirrel cage induction motor and determine equivalent circuit. 2. To study speed control of three phase induction motor by varying supply voltage. 3. To perform no load and blocked rotor tests on a single phase induction motor and determine equivalent circuit. 4. To study speed control of three phase induction motor by Keeping V/f ratio constant 5. To perform load test on a three phase induction motor and draw: (i)torque-speed characteristics (ii)power factor-line current characteristics 6. To determine V-curves and inverted V-curves of a three phase synchronous motor. 7. To determine Xd and Xq of a three phase salient pole synchronous machine using the slip test and draw the power-angle curve. 8. To determine speed-torque characteristics of three phase slip ring induction motor and study the effect of including resistance, or capacitance in the rotor circuit.
2 REV. NO. : REV. DATE : PAGE: 2 AIM 1: To perform no load and blocked rotor tests on a three phase squirrel cage induction motor and determine equivalent circuit. APPARATUS REQUIRED PROCEDURE NO LOAD TEST 1. Connections are made as per the circuit diagram AC supply is increased gradually using 3 autotransformer till rated voltage is applied. 3. Readings of voltmeter and wattmeter are noted. BLOCKED ROTOR TEST 1. Connections are made as per the circuit diagram and rotor is blocked from rotating. 2. Applied voltage is increased until rated load current flows. 3. Readings of all meters are noted.
3 REV. NO. : REV. DATE : PAGE: 3 MEASUREMENT OF STATOR RESISTANCE 1. Connections are made as per the circuit diagram. 2. Supply is given by closing the DPST switch. 3. Readings of voltmeter and ammeter are noted. 4. Stator resistance in ohms is calculated as Ra/phase = (Vx1.5) /2I CIRCUIT DIAGRAM PROCEDURE FOR CONSTRUCTING THE CIRCLE 1. Vector OO is drawn at an angle of phase with respect to OY represents the output line. 2. O X is drawn parallel to OX. 3. Vector OA is Ibr plotted at an angle of phasor with respect to OY. O A is joined which represents the output line. 4. A perpendicular bisector from output line which cuts O Y at C. With C as centre and O C as radius draw a semi-circle passing through A. 5. From A, a perpendicular is drawn meeting O X at E and OD at D. 6. AD represents Wbr in CM. EF represents stator copper loss in CM. AD represents rotor copper loss in CM.
4 REV. NO. : REV. DATE : PAGE: 4 7. Join OF which represents the torque line. 8. Line AD is extended and points S is marked, where AS is equal to rated output Y 9. Line PS is drawn parallel to output line. 10. From P, perpendicular line is drawn meeting OX at y. 11. Join OP. MEASUREMENT OF PARAMETER AT FULL LOAD Stator current = OP x X %η = (PQ/PV)x 100 %Slip = (QR/PR)x 100 Torque = (PRxV/(2ΠNT/60)) Pf = PV/OP MAXIMUM OUTPUT The perpendicular at O A line cuts the circle at P and O A at PQ. Maximum output = P1Q1x power scale (W) MAXIMUM TORQUE The perpendicular bisector of line cuts the circle at PR and OF at Q2. Maximum torque = (PFx power scale)/t Nm
5 REV. NO. : REV. DATE : PAGE: 5 RESULT Equivalent circuit of 3 phase induction motor is obtained by performing no load and blocked rotor test.
6 REV. NO. : REV. DATE : PAGE: 6 AIM 2: To study speed control of three phase induction motor by varying supply voltage APPARATUS REQUIRED : Meter Range quantity Ammeter 0-10 A 1 Voltmeter V 1 Tachometer THEORY : A 3-phase induction motor consists of stator and rotor with the other associated parts. In the stator, a 3-phase winding is provided. The windings of the three phase are displaced in space by 120º.A 3- phase current is fed to the 3-phase winding. These windings produce a resultant magnetic flux and it rotates in space like a solid magnetic poles being rotated magnetically. The performance electrical machines particularly working on DC supply system depends on voltage & frequency variation. It is expected that the m/c shall be capable of delivering the rated o/p at the rated p.f. within the variation of voltage +5% to -5% &in such variation the tempt. Shall not exceed more than specified limit. The variation of voltage & frequency beyond their limit affected the performance of m/c. 1 ) effect of change in supply voltage on starting, T st = (K 1 E 2 2 R 2 )/Z 2 But 0 is directly proportional to the supply voltage T st α V 2 Therefore starting torque is in the square proportional of supply voltage. 2)Effect of change in supply voltage on the torque under running condition T run = (KφS 2 0 R 2 )/(R 2 2 +(SX 2 ) 2 ) Therefore T is directly proportional to SV 2 if the supply voltage decreases then the torque under running condition decreases.
7 REV. NO. : REV. DATE : PAGE: 7 Hence to maintain same torque slip increases i.e. speed (full).hence slightly change in efficiency as the supply voltage changes. OBSERVATION TABLE: Sr no. V L W 1 W 2 W I L N P.F PROCEDURE: 1) Make the connection as per ckt diag. 2) Switch on the supply. 3) With the help of 3φ variac supply vary voltage in steps carefully. 4) Load the induction motor by mechanical loading arrangement till the ammeter shows reading. 5) Note down ammeter,voltmeter reading & speed of induction motor. 6) Reduce the voltage in steps & note down the readings of various meters. 7)plot speed v s voltage characteristics. CIRCUIT DIAGRAM:
8 REV. NO. : REV. DATE : PAGE: 8 CONCLUSION:- Thus we can conclude from the above experiment 1 As the voltage decreases the torque decreases. 2 As voltage decreases speed also decreases.
9 REV. NO. : REV. DATE : PAGE: 9 AIM 3: To perform no load and blocked rotor tests on a single phase induction motor and determine equivalent circuit APPARATUS REQUIRED
10 REV. NO. : REV. DATE : PAGE: 10 PRINCIPLE: Single phase motors are similar in construction to poly phase squirrel cage induction motor with exception that the stator has single phase winding. Therefore in single phase motors rotating magnetic field if not produced, but only a pulsating field is produced. The torque is also pulsating and hence single phase motors are not self starting. In order to make them self starting, they are converted to two phase motors at starting. A centrifugal switch is used to cut off the starting winding after motor picks up full speed.
11 REV. NO. : REV. DATE : PAGE: 11
12 REV. NO. : REV. DATE : PAGE: 12 PROCEDURE:- FOR NO LOAD TEST:- 1. Connections are done as shown in the diagram. 2. Supply is switched on with dimmerstat in the minimum position. 3. A low voltage is applied at starting. 4. Gradually as motor picks up speed, the rated voltage is applied. 5. The corresponding meter readings are noted FOR BLOCKED ROTOR TEST:- 1. For this test, starting winding is disconnected. 2. A small voltage is applied so that the rated current of the motor flows. 3. Corresponding meter readings are noted. (No physical blocking is required since starting windings is not connected). 4. The resistance of stator winding is also measured SAMPLE CALCULATION:- FROM NO LOAD TEST Wattmeter reading WO= W Voltmeter reading VO=.V Ammeter reading IO=.A
13 REV. NO. : REV. DATE : PAGE: 13 FROM BLOCKED ROTOR TEST Wattmeter reading Wsc =..W Voltmeter reading VSC=.V Ammeter reading ISC=.A
14 REV. NO. : REV. DATE : PAGE: 14 Thus all the equivalent circuit parameters have been determined. The final equivalent circuit is given below.
15 REV. NO. : REV. DATE : PAGE: 15
16 REV. NO. : REV. DATE : PAGE: 16 RESULTS a. The equivalent circuit parameters of the single phase induction motor are obtained and the same is drawn.. b. At slip = 5%, the following were predetermined using the equivalent circuit, 1. Stator current, I = 2. Efficiency = 3. Torque =
17 REV. NO. : REV. DATE : PAGE: 17 AIM 4: To study speed control of three phase induction motor by Keeping V/f ratio constant \
18 REV. NO. : REV. DATE : PAGE: 18 THEORY : The synchronous speed of induction motor is given by, where f is frequency of supply and P is number of poles. The synchronous speed and thereby the speed of induction motor can be controlled by controlling the supply frequency. We know that V/f is proportional to flux, therefore if we decrease the frequency while keeping voltage constant the flux in the air-gap will increase thereby causing saturation. To avoid this frequency is not decreased beyond a particular value. The frequency of the alternator output can be varied by varying the prime mover s (dc motor) speed. PROCEDURE:- 1. Connections are done as shown in the figure. 2. The motor field rheostat Rh1 is kept in minimum position and the alternator field rheostat Rh2 in the maximum position. 3. Supply is switched on. 4. The dc motor is started using the 3-point starter. The motor field rheostat Rh1 is varied till the required frequency (48-52) Hz is obtained. 5. Rh2 is varied till the rated voltage of induction motor is obtained.
19 REV. NO. : REV. DATE : PAGE: The experiment is repeated for different values of frequency keeping the supply voltage to induction motor constant at rated value. 7. Each time the speed and input current of induction motor is noted. 8. The induction motor is loaded and repeat step2 to step Rheostat Rh2 is brought back to the maximum resistance position and switch off supply.
20 REV. NO. : REV. DATE : PAGE: 20 RESULT:- Speed of 3 phase induction motor was controlled by varying the frequency and speed Vs frequency curve was plotted for both no load and constant load.
21 REV. NO. : REV. DATE : PAGE: 21 AIM 5 : To perform load test on a three phase induction motor and draw: (i)torque-speed characteristics (ii)power factor-line current characteristics APPARATUS REQUIRED:
22 REV. NO. : REV. DATE : PAGE: 22 NAME PLATE DETAILS : FUSE RATING CALCULATION : 125% of rated current. No-load test - 25% of rated current. THEORY : The load test on 3-phase induction motor is performed to obtain its various characteristics including efficiency. A belt and brake drum arrangement as shown in the circuit diagram can load the motor. If S1 and S2 are the tensions provided at the two sides of the belt, then the load torque is given by Where R is the radius of the brake drum in metre. The mechanical output of the motor is given by Where N is the speed of the motor in RPM. The power input to the motor
23 REV. NO. : REV. DATE : PAGE: 23 PRECAUTION: 1. TPST switch should be at open position phase autotransformer should be at minimum voltage position. 3. There should be no-load at the time of starting(loosen the belt on the brake drum) 4. Brake drum should be filled with water. PROCEDURE: 1. The connections are made as per the circuit diagram. 2. Power supply is obtained from the control panel. 3. The TPST switch is closed. 4. Rated voltage of 3-phase induction motor, is applied by adjusting autotransformer 5. The initial readings of ammeter, voltmeter and wattmeter are noted. 6. By increasing the load step by step, the reading of ammeter, voltmeter and wattmeter 7. Step1 to 6 is repeated till the ammeter shows the rated current of 3-phase induction motor. 8. Decrease the load, bring auto-transformer to its minimum voltage position. 9. Switch off the supply.
24 REV. NO. : REV. DATE : PAGE: 24 RESULT Torque speed characteristic is obtained from the experiment.
25 REV. NO. : REV. DATE : PAGE: 25 AIM 6: To draw the V and inverted V curves of synchronous motor at different loads. PRINCIPLE: A synchronous machine can be used as an alternator, when driven mechanically or as a motor when driven electrically. Most synchronous motors are rated between 150kW to 15MW and run at speed ranging from 150 to 1800 rpm. Based on the construction synchronous motor can be classified in to two types, 1.Cylindrical rotor type and 2.Salient pole type. In salient pole type, the rotor poles are projecting out from the rotor core. But what we are using is the other. The cylindrical rotor machine has its rotor slots. This type provides greater mechanical strength and permits more accurate dynamic balancing. It is particularly adopted for use in high speed turbo generators. Some characteristic features of a synchronous motor are: 1. It runs either at synchronous speed or not at all. The only way to change its speed is to vary the supply frequency. 2. It is not inherently self starting. 3. It is capable of being operated under a wide range.
26 REV. NO. : REV. DATE : PAGE: 26 PROCEDURE:- FOR DETERMINATION OF V AND INVERTED V CURVES: 1. Connections are given as per the circuit diagram. 2. The auto transformer is adjusted such that it reads the rated voltage. 3. At no-load condition, the field excitation was varied and the corresponding line current and the wattmeter readings are noted. 4. Then by keeping 75% load, the excitation was adjusted by varying the field rheostat and the above readings are noted. 5. Same procedure was followed for full load.
27 REV. NO. : REV. DATE : PAGE: 27 RESULT: The V curves and inverted V-curve for different load condition are drawn.
28 REV. NO. : REV. DATE : PAGE: 28 AIM 7: To determine Xd and Xq of a three phase salient pole synchronous machine using the slip test and draw the power-angle curve APPARATUS REQUIRED-- CIRCUIT DIAGRAM
29 REV. NO. : REV. DATE : PAGE: 29 THEORY:- If a synchronous machine runs at a slightly less than the synchronous speed, the field structure is exposed to the rotating mmf of armature reaction. Hence the poles and armature reaction mmf fall in phase and out of phase at slip frequency. Where the axis of two coincides, the armature acts through the field magnetic circuit, including maximum voltage in the field. The direct axis reactance Xd (and hence the impedance Zd) is maximum resulting in the armature current being minimum. Where the field poles are in quadrature with armature mmf, quadrature axis reactance Xq (and hence the impedance Zq) will be minimum resulting in the armature current maximum. Hence, Zd = Max. voltage / min. current Zq = Min. voltage / max. current
30 REV. NO. : REV. DATE : PAGE: 30
31 REV. NO. : REV. DATE : PAGE: 31 PROCEDURE:- 1. Make connections as shown in circuit diagram. 2. Start the set and bring it to near synchronous speed keeping the field of the alternator open. 3. Apply an AC voltage of reduced magnitude (about 25% of the rated value). The field poles and armature mmf should rotate in same direction this can be verified by measuring the voltage across the field winding (It should be nearly equal to zero) Otherwise interchange the stator terminals. 4. Adjust the speed of the alternator to get sufficient oscillations (Maximum deflection) in the meter. 5. Note down the maximum and minimum value of ammeter and voltmeter.
32 REV. NO. : REV. DATE : PAGE: 32
33 REV. NO. : REV. DATE : PAGE: 33 RESULT:- Performed slip test, calculated d axis and q axis synchronous reactance and plotted the Graphs
34 REV. NO. : REV. DATE : PAGE: 34 AIM 8: To determine speed-torque characteristics of three phase slip ring induction motor and study the effect of including resistance, or capacitance in the rotor circuit. APPARATUS: 1) 3 phase slip-ring Induction motor. 415V, 3 HP, 1500rpm. 2) Voltmeter. (0-600V, AC.) 3) Ammeter. (0-10A, AC.) 4) Rheostat. 50 ohms, 5A, (3Nos.) 5) 3 Phase Dimmer stat. 6) Connecting Wires. 7) Tachometer. CIRCUIT DIAGRAM:
35 REV. NO. : REV. DATE : PAGE: 35 THEORY: It should cover the following. 1. Construction and working of a slipring I.M. 2. Application of a slipring I.M. 3. Torque-slip characteristic of I.M. for different values of rotor resistance. 4. Explanation about the circuit connection. PROCEDURE: 1. Connect the ckt. as shown. 2. Keep the Dimmerstat as zero output voltage & the external rotor resistance at minimum resistance position. 3. Switch ON the supply & increase the input voltage to stator winding upto its rated value. 4. Measure the speed. 5. Now increase the rotor resistance in steps & note the corresponding values of speed. 6. Draw a graph of rotor resistance versus speed.
36 REV. NO. : REV. DATE : PAGE: 36 OBSERVATION TABLE: PRECAUTION: 1) All connections should be tight. 2) No loose wires should be on the working table. 3) Supply should not be switched on till connections are checked by the teacher. 4) The motor input current should not exceed its rated value. GRAPH : Draw a graph of rotor external resistance versus speed. RESULT: It found that with rise in rotor resistance, there is a corresponding drop in the speed.
DHANALAKSHMI COLLEGE OF ENGINEERING MANIMANGALAM. TAMBARAM, CHENNAI B.E. ELECTRICAL AND ELECTRONICS ENGINEERING
DHANALAKSHMI COLLEGE OF ENGINEERING MANIMANGALAM. TAMBARAM, CHENNAI B.E. ELECTRICAL AND ELECTRONICS ENGINEERING V SEMESTER EE2305 ELECTRICAL MACHINES II LABORATORY LABORATORY MANUAL 1 CONTENT S. No. Name
More informationELECTRICAL MACHINES-II LABORATORY MANUAL
ELECTRICAL MACHINES-II LABORATORY MANUAL T. ANIL KUMAR Associate Professor Department of Electrical and Electrical Engineering N. SINDHU Assistant Professor Department of Electrical and Electrical Engineering
More informationSRM Institute of Science and Technology (Deemed to be University)
5EE0L-ELECTRICAL MACHINES LAB-II RECORD ACADEMIC YEAR: ODD SEMESTER 08-9 NAME : REG.NO. : DEPARTMENT OF ELECTRICAL & ELECTRONICS ENGINEERING FACULTY OF ENGINEERING & TECHNOLOGY SRM Institute of Science
More informationELECTRICAL AND ELECTRONICS LABORATROY MANUAL
ELECTRICAL AND ELECTRONICS LABORATROY MANUAL K CHAITANYA Assistant Professor Department of Electrical and Electrical Engineering A. NARESH KUMAR Assistant Professor Department of Electrical and Electrical
More informationEXPERIMENT CALIBRATION OF 1PHASE ENERGY METER
EXPERIMENT CALIBRATION OF PHASE ENERGY METER THEORY:- Energy Meters are integrating instruments used to measure the quantity of electrical energy supplied to a circuit in a given time. Single phase energy
More informationThe Wound-Rotor Induction Motor Part I
Experiment 1 The Wound-Rotor Induction Motor Part I OBJECTIVE To examine the construction of the three-phase wound-rotor induction motor. To understand exciting current, synchronous speed and slip in a
More informationELECTRICAL MAINTENANCE
ELECTRICAL MAINTENANCE II PRACTICAL JOURNAL DATA 1 EXPERIMENT NO. 1 AIM: TO FIND VOLTAGE RATIO OF A GIVEN TRANSFORMER. CIRCUIT DIAGRAM: OBSERVATION TABLE: Sr.No. 1 2 3 4 Primary Voltage (V 1 ) Secondary
More informationSynchronous Generators I. EE 340 Spring 2011
Synchronous Generators I EE 340 Spring 2011 Construction of synchronous machines In a synchronous generator, a DC current is applied to the rotor winding producing a rotor magnetic field. The rotor is
More informationSynchronous Generators I. Spring 2013
Synchronous Generators I Spring 2013 Construction of synchronous machines In a synchronous generator, a DC current is applied to the rotor winding producing a rotor magnetic field. The rotor is then turned
More informationMUFFAKHAM JAH COLLEGE OF ENGINEERING & TECHNOLOGY EXPT.1: SCOTT CONNECTION OF TRANSFORMERS
EXPT.1: SCOTT CONNECTION OF TRANSFORMERS Page 1 AIM : To study the conversion of three phase supply to two phase supply by using scott connected transformers NAME PLATE DETAILS: EQUIPMENTS REQUIRED: SL.NO
More informationDEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING QUESTION BANK 16EET41 SYNCHRONOUS AND INDUCTION MACHINES UNIT I SYNCHRONOUS GENERATOR 1. Why the stator core is laminated? 2. Define voltage regulation
More informationElectrical Machines -II
Objective Type Questions: 1. Basically induction machine was invented by (a) Thomas Alva Edison (b) Fleming (c) Nikola Tesla (d) Michel Faraday Electrical Machines -II 2. What will be the amplitude and
More informationDHANALAKSHMI COLLEGE OF ENGINEERING Manimangalam, Tambaram, Chennai
DHANALAKSHMI COLLEGE OF ENGINEERING Manimangalam, Tambaram, Chennai 601 301 DEPARTMENT OF MECHANICAL ENGINEERING EE 8361- Electrical Engineering LABORATORY III SEMESTER - R 2017 LABORATORY MANUAL Name
More informationEFFECT OF CAPACITOR ON STARTING & RUNNING OF SINGLE PHASE INDUCTION MOTOR
INDEX NO. : M-145 TECHNICAL MANUAL FOR EFFECT OF CAPACITOR ON STARTING & RUNNING OF SINGLE PHASE INDUCTION MOTOR Manufactured by : PREMIER TRADING CORPORATION 212/1, Mansarover Civil Lines, MEERUT. Phone
More informationSingle Phase Induction Motor. Dr. Sanjay Jain Department Of EE/EX
Single Phase Induction Motor Dr. Sanjay Jain Department Of EE/EX Application :- The single-phase induction machine is the most frequently used motor for refrigerators, washing machines, clocks, drills,
More informationStarting of Induction Motors
1- Star Delta Starter The method achieved low starting current by first connecting the stator winding in star configuration, and then after the motor reaches a certain speed, throw switch changes the winding
More informationList of Experiments (Cycle-2)
List of Experiments (Cycle-) SL.No Experiment HOPKINSON S TEST RETARDATION TEST 3 SEPARATION OF LOSSES IN A SINGLE PHASE TRANSFORMER 4 SEPERATION OF LOSSES IN A DC SHUNT MACHINE 5 SUMPNER S TEST Experiment
More informationAC MOTOR TYPES. DESCRIBE how torque is produced in a single-phase AC motor. EXPLAIN why an AC synchronous motor does not have starting torque.
Various types of AC motors are used for specific applications. By matching the type of motor to the appropriate application, increased equipment performance can be obtained. EO 1.5 EO 1.6 EO 1.7 EO 1.8
More information2014 ELECTRICAL TECHNOLOGY
SET - 1 II B. Tech I Semester Regular Examinations, March 2014 ELECTRICAL TECHNOLOGY (Com. to ECE, EIE, BME) Time: 3 hours Max. Marks: 75 Answer any FIVE Questions All Questions carry Equal Marks ~~~~~~~~~~~~~~~~~~~~~~~~~~
More informationElectrical Machines-I (EE-241) For S.E (EE)
PRACTICAL WORK BOOK For Academic Session 2013 Electrical Machines-I (EE-241) For S.E (EE) Name: Roll Number: Class: Batch: Department : Semester/Term: NED University of Engineer ing & Technology Electrical
More informationELECTRICAL MACHINES I
PRACTICAL WORK BOOK ELECTRICAL MACHINES I EX-404 Name: Enrollment No: Branch: Semester: Batch: Department of Electrical Engineering Name of Laboratory : Electrical Machine - I Lab Subject Code : Ex 404
More informationSIDDHARTH GROUP OF INSTITUTIONS :: PUTTUR
SIDDHARTH GROUP OF INSTITUTIONS :: PUTTUR Siddharth Nagar, Narayanavanam Road 517583 QUESTION BANK (DESCRIPTIVE) Subject with Code : ET(16EE212) Year & Sem: II-B.Tech & II-Sem UNIT I DC GENERATORS Course
More informationTo expose the students to the operation of D.C. machines and transformers and give them experimental skill.
TOTAL: 45 PERIODS EE6411 ELECTRICAL MACHINES LABORATORY I L T P C 0 0 3 2 OBJECTIVES: To expose the students to the operation of D.C. machines and transformers and give them experimental skill. LIST OF
More informationRegulation: R16 Course & Branch: B.Tech EEE
SIDDHARTH GROUP OF INSTITUTIONS :: PUTTUR Siddharth Nagar, Narayanavanam Road 517583 QUESTION BANK (Descriptive) Subject with Code : Electrical Machines-II (16EE215) Regulation: R16 Course & Branch: B.Tech
More informationR07 SET - 1
R07 SET - 1 II B. Tech II Semester Supplementary Examinations April/May 2013 ELECTRICAL MACHINES - II (Electrical and Electronics Engineering) Time: 3 hours Max. Marks: 80 Answer any FIVE Questions All
More informationDEPARTMENT OF EI ELECTRICAL MACHINE ASSIGNMENT 1
It is the mark of an educated mind to be able to entertain a thought without accepting it. DEPARTMENT OF EI ELECTRICAL MACHINE ASSIGNMENT 1 1. Explain the Basic concepts of rotating machine. 2. With help
More informationINDUCTION MOTORS 1. OBJECTIVE 2. SAFETY
INDUCTION MOTORS 1. OBJECTIE To study a 3-phase induction motor, by using its experimentally developed equivalent circuit diagram and by obtaining its basic characteristics: torque/slip, current/slip and
More information694 Electric Machines
694 Electric Machines 9.1 A 4-pole wound-rotor induction motor is used as a frequency changer. The stator is connected to a 50 Hz, 3-phase supply. The load is connected to the rotor slip rings. What are
More informationSingle Phase Induction Motors
Single Phase Induction Motors Prof. T. H. Panchal Asst. Professor Department of Electrical Engineering Institute of Technology Nirma University, Ahmedabad Introduction As the name suggests, these motors
More informationPerformance Analysis of Dual Stator Induction Motor
Performance Analysis of Dual Stator Induction Motor Prof. Anagha R. Soman 1, Sachin Madaan 2, Shubh Gupta 3, Abhishek Singh 4, Virendra Yadav 5, Ankit Tiwari 6 1Professor,Dept. of Electrical Engineering,
More informationESO 210 Introduction to Electrical Engineering
ESO 210 Introduction to Electrical Engineering Lectures-37 Polyphase (3-phase) Induction Motor 2 Determination of Induction Machine Parameters Three tests are needed to determine the parameters in an induction
More informationUnit III-Three Phase Induction Motor:
INTRODUCTION Unit III-Three Phase Induction Motor: The three phase induction motor runs on three phase AC supply. It is an ac motor. The power is transferred by means of induction. So it is also called
More informationLecture 20: Stator Control - Stator Voltage and Frequency Control
Lecture 20: Stator Control - Stator Voltage and Frequency Control Speed Control from Stator Side 1. V / f control or frequency control - Whenever three phase supply is given to three phase induction motor
More informationUnit-II Synchronous Motor
Unit-II Synchronous Motor CONSTRUCTION OF THREE PHASE SYNCHRONOUS MOTOR PRINCIPLE OF OPERATION Prepared By P.Priyadharshini Ap/EEE - 1 - Note: 1. The average torque exerted on the rotor of synchronous
More information2-marks question bank UNIT I - TRANSFORMERS UNIT II: AC MACHINES
2-marks question bank UNIT I - TRANSFORMERS 1. What is all day efficiency? 2. What are the applications of auto transformers? 3. Why transformer rating is expressed in KVA? 4. Does transformer draw any
More informationElectrical Machines II. Week 5-6: Induction Motor Construction, theory of operation, rotating magnetic field and equivalent circuit
Electrical Machines II Week 5-6: Induction Motor Construction, theory of operation, rotating magnetic field and equivalent circuit Asynchronous (Induction) Motor: industrial construction Two types of induction
More informationContents. Review of Electric Circuitd. Preface ;
Preface ; Chapter 1 Review of Electric Circuitd 1.1 Introduction, 1 1.2 Direct Circuit Current, 1 1.2.1 Voltage, 3 1.2.2 Power, 3 1.2.3 Ohm's Law, 5 1.2.4 KirchhofTs Laws, 5 1.2.4.1 Kirchhoff s Current
More informationR13 SET - 1. b) Describe different braking methods employed for electrical motors. [8M]
Code No:RT32026 R13 SET - 1 III B. Tech II Semester Regular Examinations, April - 2016 POWER SEMICONDUCTOR DRIVES (Electrical and Electronics Engineering) Time: 3 hours Maximum Marks: 70 Note: 1. Question
More information2. Draw the speed-torque characteristics of dc shunt motor and series motor. (May2013) (May 2014)
UNIT 2 - DRIVE MOTOR CHARACTERISTICS PART A 1. What is meant by mechanical characteristics? A curve is drawn between speed-torque. This characteristic is called mechanical characteristics. 2. Draw the
More information(d) None of the above.
Dr. Mahalingam College of Engineering and Technology, Pollachi-3 (An Autonomous Institution affiliated to Anna niversity) CCET II (2016 Regulation) Name of Programme: B.E. (EEE) Course Code & Course Title:
More informationShort questions and answers. EE1251 Electrical Machines II
Short questions and answers EE1251 Electrical Machines II 1. Why almost all large size Synchronous machines are constructed with rotating field system type? The following are the principal advantages of
More informationII/IV B.Tech(Regular) DEGREE EXAMINATION. Electronics & Instrumentation Engineering
SCHME OF EVALUTION II/IV B.Tech(Regular) DEGREE EXAMINATION JUNE,2016 EI ET 403 Electrical Technology Electronics & Instrumentation Engineering Max.Marks :60 marks -----------------------------------------------------------------------------------------------------------
More informationSYLLABUS 1. SYNCHRONOUS GENERATOR 9 2. SYNCHRONOUS MOTOR 8
SYLLABUS 1. SYNCHRONOUS GENERATOR 9 Constructional details Types of rotors emf equation Synchronous reactance Armature reaction Voltage regulation EMF, MMF, ZPF and A.S.A methods Synchronizing and parallel
More informationBHARAT ALUMINIUM COMPANY LTD. SPECIFICATIONS FOR SYNCHRONOUS GENERATOR GENERAL Make : Jinan Power Equipment Factory Type : WX2
BHARAT ALUMINIUM COMPANY LTD. SPECIFICATIONS FOR SYNCHRONOUS GENERATOR 1.00.00 GENERAL 1.01.00 Make : Jinan Power Equipment Factory 1.02.00 Type : WX21Z-073LLT 1.03.00 Reference Standard : GB/T7064-2002
More informationUNIT-I ALTERNATORS PART-A
UNIT-I ALTERNATORS 1. What principle is used in Alternators? 2. What are the requirements of an alternator? 3. Mention the types of alternator rotor. 4. What is hunting in alternators? 5. What are the
More informationGROUP OF INSTITUTIONS :: PUTTUR UNIT I SINGLE PHASE TRANSFORMERS
SIDDHARTH GROUP OF INSTITUTIONS :: PUTTUR Siddharth Nagar, Narayanavanam Road 517583 QUESTION BANK (Descriptive) Subject with Code : Electrical Machines-II (16EE215) Course & Branch: B.Tech EEE Regulation:
More informationDC CIRCUITS ELECTROMAGNETISM
DC CIRCUITS 1. State and Explain Ohm s Law. Write in brief about the limitations of Ohm s Law. 2. State and explain Kirchhoff s laws. 3. Write in brief about disadvantages of series circuit and advantages
More informationAPGENCO/APTRANSCO Assistant Engineer Electrical Previous Question Papers Q.1 The two windings of a transformer is conductively linked. inductively linked. not linked at all. electrically linked. Q.2 A
More informationSt.MARTIN S ENGINEERING COLLEGE Dhulapally, Secunderabad
St.MARTIN S ENGINEERING COLLEGE Dhulapally, Secunderabad-500 014 Subject: STATIC DRIVES Class : EEE III TUTORIAL QUESTION BANK Group I QUESTION BANK ON SHORT ANSWER QUESTION UNIT-I 1 What is meant by electrical
More informationSub:EE6604/DESIGN OF ELECTRICAL MACHINES Unit V SYNCHRONOUS MACHINES. 2. What are the two type of poles used in salient pole machines?
SRI VIDYA COLLEGE OF ENGINEERING & TECHNOLOGY DEPARTMENT OF EEEE QUESTION BANK Sub:EE6604/DESIGN OF ELECTRICAL MACHINES Unit V SYNCHRONOUS MACHINES 1. Name the two types of synchronous machines. 1. Salient
More information10. Starting Method for Induction Motors
10. Starting Method for Induction Motors A 3-phase induction motor is theoretically self starting. The stator of an induction motor consists of 3-phase windings, which when connected to a 3-phase supply
More informationST. ANNE S COLLEGE OF ENGINEERING AND TECHNOLOGY 9001:2015 CERTIFIED INSTITUTION) ANGUCHETTYPALAYAM, PANRUTI
ST. ANNE S COLLEGE OF ENGINEERING AND TECHNOLOGY (AN ISO 9001:2015 CERTIFIED INSTITUTION) ANGUCHETTYPALAYAM, PANRUTI 607 110. EE6504 ELECTRICAL MACHINES - II UNIT I SYNCHRONOUS GENERATOR PART A 1. What
More informationSPEED CONTROL OF DC SHUNT MOTOR
INDEX NO. : M-140 TECHNICAL MANUAL FOR SPEED CONTROL OF DC SHUNT MOTOR Manufactured by : PREMIER TRADING CORPORATION (An ISO 9001:2000 Certified Company) 212/1, Mansarover Civil Lines, MEERUT. Phone :
More informationEEE3441 Electrical Machines Department of Electrical Engineering. Lecture. Introduction to Electrical Machines
Department of Electrical Engineering Lecture Introduction to Electrical Machines 1 In this Lecture Induction motors and synchronous machines are introduced Production of rotating magnetic field Three-phase
More informationDEPARTMENT OF ELECTRICAL & ELECTRONICS ENGINEERING VI SEMESTER (NEW SCHEME)
DEPARTMENT OF ELECTRICAL & ELECTRONICS ENGINEERING VI SEMESTER (NEW SCHEME) 10EEL67 DC AND SYNCHRONOUS MACHINES LAB LABORATORY MANUAL NAM E OF THE STUDENT : BRANCH : UNIVERSITY SEAT NO. : SEMESTER & SECTION
More informationROTATING MAGNETIC FIELD
Chapter 5 ROTATING MAGNETIC FIELD 1 A rotating magnetic field is the key to the operation of AC motors. The magnetic field of the stator is made to rotate electrically around and around in a circle. Stator
More information14 Single- Phase A.C. Motors I
Lectures 14-15, Page 1 14 Single- Phase A.C. Motors I There exists a very large market for single-phase, fractional horsepower motors (up to about 1 kw) particularly for domestic use. Like many large volume
More informationGENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
XXXX H02 GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER XXXX CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE
More informationCHAPTER 6 DESIGN AND DEVELOPMENT OF DOUBLE WINDING INDUCTION GENERATOR
100 CHAPTER 6 DESIGN AND DEVELOPMENT OF DOUBLE WINDING INDUCTION GENERATOR 6.1 INTRODUCTION Conventional energy resources are not sufficient to meet the increasing electrical power demand. The usages of
More informationPractical Manual Lab: Electrical Technology
Practical Manual Lab: Electrical Technology 1 st yr (CSE/EE/ME/CV/ECE) Electronics &Communication Engg. (ECE) RAO PAHALD SINGH GROUP OF INSTITUTIONS BALANA(MOHINDER GARH)123029 Prepared By. Mr.NAVEEN CHAUHAN
More informationInstructor. Payam Zarbakhsh. Department of electrical electronics engineering
Instructor Payam Zarbakhsh Department of electrical electronics engineering Electrical Machines Induction Motors_Note(1) Comparing with synchronous motor No dc field current is required to run the machine.
More informationEMEC 1 LAB Laboratory Manual
DEV BHOOMI INSTITUTE OF TECHNOLOGY CHAKRATA ROAD,NAVGAOUN MANDUWALA,UTTARAKHAND Programs: B.TECH. (Electrical and Electronics Engineering) EMEC 1 LAB Laboratory Manual PREPARED BY Saurabh Rajvanshi ASST.PROFESSOR,
More informationScheme - I. Sample Question Paper
Program Name Program Code Course Title Sample Question Paper : Diploma in Industrial Electronics : IE : Electrical Machines and Transformers Max. Marks : 70 Time : 3 Hrs. Q1. ATTEMPT ANY FIVE OF THE FOLLOWING.
More informationEXPERIMENT 2 THREE PHASE INDUCTION MOTOR, PART 1
University f Jordan School of Engineering Department of Mechatronics Engineering Electrical Machines Lab Eng. Osama Fuad Eng. Nazmi Ashour EXPERIMENT 2 THREE PHASE INDUCTION MOTOR, PART 1 OBJECTIVES To
More informationCircuit Diagram For Speed Control Of Slip Ring Induction Motor
Circuit Diagram For Speed Control Of Slip Ring Induction Motor A wound-rotor motor is a type of induction motor where the rotor windings are Compared to a squirrel-cage rotor, the rotor of the slip ring
More informationPretest Module 21 Unit 4 Single-Phase Motors
Pretest Module 21 Unit 4 Single-Phase Motors 1. What are the four main components of a single-phase motor? Rotor, stator, centrifugal switch, end bells and bearings 2. How is a rotating field created in
More informationINDIAN MARITIME UNIVERSITY KOLKATA CAMPUS
INDIAN MARITIME UNIVERSITY KOLKATA CAMPUS No. IMU-KC/Laboratory Equipment/16-17 Date: 17.02.2017 Sub: Quotation for procurement of Instruments for Electrical Machine Laboratory at IMU-Kolkata Campus Sealed
More informationLoad Test On 3 Phase Slip Ring Induction Motor Lab Manual
Load Test On 3 Phase Slip Ring Induction Motor Lab Manual Electrical engineering machine lab manual. Brake test on three phase squirrel cage induction motor. No-load &, blocked rotor tests on three phase
More informationSynchronous Motor Drives
UNIT V SYNCHRONOUS MOTOR DRIVES 5.1 Introduction Synchronous motor is an AC motor which rotates at synchronous speed at all loads. Construction of the stator of synchronous motor is similar to the stator
More informationEE6351 ELECTRIC DRIVES AND CONTROL UNIT-1 INTRODUTION
EE6351 ELECTRIC DRIVES AND CONTROL UNIT-1 INTRODUTION 1. What is meant by drive and electric drive? Machines employed for motion control are called drives and may employ any one of the prime movers for
More informationAE105 PRINCIPLES OF ELECTRICAL ENGINEERING JUNE 2014
Q.2 a. Explain in detail eddy current losses in a magnetic material. Explain the factors on which it depends. How it can be reduced? IETE 1 b. A magnetic circuit with a single air gap is shown in given
More informationDepartment of Electrical and Computer Engineering
Page 1 of 1 Faculty of Engineering, Architecture and Science Department of Electrical and Computer Engineering Course Number EES 612 Course Title Electrical Machines and Actuators Semester/Year Instructor
More informationEXPERIMENT 19. Starting and Synchronizing Synchronous Machines PURPOSE: BRIEFING: To discover the method of starting synchronous motors.
EXPERIMENT 19 Starting and Synchronizing Synchronous Machines PURPOSE: To discover the method of starting synchronous motors. BRIEFING: When three-phase is applied to the stator of a three-phase motor,
More informationVALLIAMMAI ENGINEERING COLLEGE
VALLIAMMAI ENGINEERING COLLEGE SRM Nagar, Kattankulathur 603 203. DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING Question Bank EE6401 ELECTRICAL MACHINES I UNIT I: MAGNETIC CIRCUITS AND MAGNETIC
More informationINSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING
Course Name Course Code Class Branch INSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad - 500 0 DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING : Static Drives : A60225 : III -
More informationSRI VIDYA COLLEGE OF ENGINEERING & TECHNOLOGY QUESTION BANK UNIT III EC6352-ELECTRICAL ENGINEERING AND INSTRUMENTATION UNIT III PART A
SRI VIDYA COLLEGE OF ENGINEERING & TECHNOLOGY QUESTION BANK UNIT III EC6352-ELECTRICAL ENGINEERING AND INSTRUMENTATION UNIT III PART A INDUCTION MOTORS 1. What are the 2 types of 3phase induction motor?
More informationSharjah Indian School Sharjah Boys Wing
Read the instructions given below carefully before writing the fair record book. The following details are to be written on the LEFT HAND SIDE of the book. CIRCUIT DIAGRAM CALCULATIONS The remaining details
More informationRenewable Energy Systems 13
Renewable Energy Systems 13 Buchla, Kissell, Floyd Chapter Outline Generators 13 Buchla, Kissell, Floyd 13-1 MAGNETISM AND ELECTROMAGNETISM 13-2 DC GENERATORS 13-3 AC SYNCHRONOUS GENERATORS 13-4 AC INDUCTION
More information1. Poly Phase Induction Motor
1.1 Introduction An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic
More informationROTOR RESISTANCE SPEED CONTROL OF WOUND ROTOR INDUCTION MOTOR
1 Electrical Machines Lab Experiment-No. ROTOR RESISTANCE SPEED CONTROL OF WOUND ROTOR INDUCTION MOTOR AIM: To vary the speed of the wound rotor induction motor using rotor rheostat control. Theory The
More informationInstitute of Technology, Nirma University B. Tech. Sem. V: Electrical Engineering 2EE305: ELECTRICAL MACHINES II. Handout: AC Commutator Motors
Institute of Technology, Nirma University B. Tech. Sem. V: Electrical Engineering 2EE305: ELECTRICAL MACHINES II Handout: AC Commutator Motors Prepared by: Prof. T. H. Panchal Learning Objective: Introduction
More informationUnit III A.C. Machines Explain the construction of induction motor. General principle Construction Stator:
Unit III A.C. Machines - Principle of operation of 3-phase Induction Motor Torque, slips characteristics- Speed control methods Single-phase Induction motor starting methods Principle of operation of Alternators.
More informationDate: Name: ID: LABORATORY EXPERIMENT NO. 8 INDUCTION MOTOR/GENERATOR 8-1
Date: Name: ID: LABORATORY EXPERIMENT NO. 8 INDUCTION MOTOR/GENERATOR 8-1 OBJECT 1. To determine the general performance of a squirrel motors 2. To observe the characteristics of induction generators.
More informationAPPARATUS AND MATERIAL REQUIRED Resistor, ammeter, (0-1.5A) voltmeter (0-5V ), battery, one way key, rheostat, sand paper, connecting wires.
ACTIVITIES ACTIVITY 1 AIM To assemble the components of a given electrical circuit. APPARATUS AND MATERIAL REQUIRED Resistor, ammeter, (0-1.5A) voltmeter (0-5V ), battery, one way key, rheostat, sand paper,
More informationVIII. Three-phase Induction Machines (Asynchronous Machines) Induction Machines
VIII. Three-phase Induction Machines (Asynchronous Machines) Induction Machines 1 Introduction Three-phase induction motors are the most common and frequently encountered machines in industry simple design,
More informationCódigo de rotor bloqueado Rotor bloqueado, Letra de código. Rotor bloqueado, Letra de código
Letra de código Código de rotor bloqueado Rotor bloqueado, Letra de código kva / hp kva / hp A 0.00 3.15 L 9.00 10.00 B 3.15 3.55 M 10.00 11.00 C 3.55 4.00 N 11.00 12.50 D 4.00 4.50 P 12.50 14.00 E 4.50
More informationTo discover the factors affecting the direction of rotation and speed of three-phase motors.
EXPERIMENT 12 Direction of Rotation of Three-Phase Motor PURPOSE: To discover the factors affecting the direction of rotation and speed of three-phase motors. BRIEFING: The stators of three-phase motors
More informationVALLIAMMAI ENGINEERING COLLEGE MECHANICAL ENGINEERING ANNA UNIVERSITY CHENNAI II YEAR MECH / III SEMESTER EE6351 - ELECTRICAL DRIVES AND CONTROL (REGULATION 2013) UNIT I INTRODUCTION PART-A (2 MARKS) 1.
More informationUNIT I SYNCHRONOUS GENERATOR PART-A
1. What is an alternator? UNIT I SYNCHRONOUS GENERATOR PART-A An alternator or AC generator is a synchronous machine which converts mechanical energy into electrical energy and produces alternating emf.
More informationModule 9. DC Machines. Version 2 EE IIT, Kharagpur
Module 9 DC Machines Lesson 38 D.C Generators Contents 38 D.C Generators (Lesson-38) 4 38.1 Goals of the lesson.. 4 38.2 Generator types & characteristics.... 4 38.2.1 Characteristics of a separately excited
More informationSYNCHRONOUS GENERATOR (ALTERNATOR)
i SYLLABUS osmania university UNIT - I SYNCHRONOUS MACHINES Constructional Details, Types of Windings, Winding Factors, EMF Equation, Fractional Pitch and Fractional Slot Windings, Suppression of Harmonics
More informationELECTRIC MACHINES EUROLAB 0.3 kw
index SINGLE-PHASE MOTORS SPLIT-PHASE MOTOR DL 30130 CAPACITOR MOTOR DL 30140 UNIVERSAL MOTOR DL 30150 REPULSION MOTOR DL 30170 THREE PHASE ASYNCHRONOUS MOTORS SQUIRREL CAGE THREE PHASE ASYNCHRONOUS MOTOR
More informationTo study the constructional features of ammeter, voltmeter, wattmeter and energymeter.
Experiment o. 1 AME OF THE EXPERIMET To study the constructional features of ammeter, voltmeter, wattmeter and energymeter. OBJECTIVE 1. To be conversant with the constructional detail and working of common
More informationPretest Module 21 Units 1-4 AC Generators & Three-Phase Motors
Pretest Module 21 Units 1-4 AC Generators & Three-Phase Motors 1. What are the two main parts of a three-phase motor? Stator and Rotor 2. Which part of a three-phase squirrel-cage induction motor is a
More informationPrinciples of Electrical Engineering
D.C GENERATORS Principle of operation of D.C machines, types of D.C Generators, e.m.f equation of D.C Generator, O.C.C of a D.C Shunt Generator, Load characteristics of D.C.Generators GENERATOR PRINCIPLE:
More informationStudy and Measure the Active and Reactive Power Developed By a Three Phase Induction Generator with Capacitive Load
International Journal of Engineering and Technical Research (IJETR) Study and Measure the Active and Reactive Power Developed By a Three Phase Induction Generator with Capacitive Load Surajit Mondal, Oisik
More informationELECTRIC MACHINES EUROLAB 0.3 kw
index SINGLE-PHASE MOTORS SPLIT-PHASE MOTOR DL 30130 CAPACITOR MOTOR DL 30140 UNIVERSAL MOTOR DL 30150 REPULSION MOTOR DL 30170 THREE PHASE ASYNCHRONOUS MOTORS SQUIRREL CAGE THREE PHASE ASYNCHRONOUS MOTOR
More informationEE6401 ELECTRICAL MACHINES I UNIT I: MAGNETIC CIRCUITS AND MAGNETIC MATERIALS PART: A 1. Define EMF and MMF. 2. Name the main magnetic quantities with their symbols having the following units: Webers,
More informationECE 325 Electric Energy System Components 6 Three Phase Induction Motors. Instructor: Kai Sun Fall 2016
ECE 325 Electric Energy System Components 6 Three Phase Induction Motors Instructor: Kai Sun Fall 2016 1 Content (Materials are from Chapters 13-15) Components and basic principles Selection and application
More informationLab Electrical Power Engineering I
INSTITUT FÜR ELEKTRISCHE MASCHINEN RHEINISCH-WESTFÄLISCHE TECHNISCHE HOCHSCHULE AACHEN Lab Electrical Power Engineering I Test 3: Induction machine with squirrel cage rotor and slip ring rotor 1 Experiment
More information