# DHANALAKSHMI COLLEGE OF ENGINEERING MANIMANGALAM. TAMBARAM, CHENNAI B.E. ELECTRICAL AND ELECTRONICS ENGINEERING

Save this PDF as:

Size: px
Start display at page:

Download "DHANALAKSHMI COLLEGE OF ENGINEERING MANIMANGALAM. TAMBARAM, CHENNAI B.E. ELECTRICAL AND ELECTRONICS ENGINEERING"

## Transcription

1 DHANALAKSHMI COLLEGE OF ENGINEERING MANIMANGALAM. TAMBARAM, CHENNAI B.E. ELECTRICAL AND ELECTRONICS ENGINEERING V SEMESTER EE2305 ELECTRICAL MACHINES II LABORATORY LABORATORY MANUAL 1

2 CONTENT S. No. Name of the experiment Marks Signature 1 Regulation of a three phase alternator by EMF and MMF methods 2 Regulation of a three phase alternator by ZPF and ASA methods 3 Regulation of a three phase alternator by Slip test 4 Measurement of negative sequence and zero sequence impedance of alternators 5 V curves and inverted V curves of synchronous Motor 6 Load test on a three phase squirrel cage induction motor 7 No load and blocked rotor tests on a three phase induction motor 8 Load test on single phase Induction Motor 9 No load test and blocked rotor on single phase Induction Motor 2

4 O.C. TEST: 1. Using the 200 ohm potential divider, current in field circuit is increased in steps of 0.1A and at each step the alternator induced voltage indicated by voltmeter and the corresponding field current (I f ) are noted in tabular column. 2. This procedure is continued until the alternator voltage is 120% of its rated voltage. 3. After completing O.C. Test, the potential divider and motor field rheostat are brought to its minimum position. 4. After completing the experiment, calculate Synchronous Impedance, Synchronous Reactance & Regulation using the formulae given. 5. Using the data, Plot the graph between E o Vs I f. S.C. TEST: 1. The alternator terminals are short circuited by closing TPST switch through an ammeter. 2. The rated current is made to flow through the armature of the stator windings by carefully adjusting 220 ohms potential divider from the minimum position. 3. After completing the experiment, calculate the Load current, Field Current and Regulation. 4. Using the data, Plot the graph I sc vs I f and % Regulation vs Power Factor for both the EMF and MMF methods. CIRCUIT DIAGRAM: FUSE CALCULATION: MOTOR 4

5 ALTERNATOR TABULATION: O.C. TEST S.C TEST S. No. I f (A) V g(1-1) (V) V g (ph) (V) S.C TEST S. No. I f (A) I SC (A) FORMULAE USED: 1. Synchronous Impedance (ph),z S = (Open circuit voltage/phase) / (Short circuit current/phase) (For the same field current) 2. Synchronous Reactance (Ph), X S = [(Z S ) 2 -(R a ) 2 ] 1/2 EMF Method: E 0 ={(Vcos Φ +I a R a ) 2 +(VSin Φ)±I a X S ) 2 } 1/2 E 0 = Induced EMF per Phase, V=Rated voltage per phase, R a = Armature resistance in Ω, I a = Armature current in A; + for lagging p.f. load. - for leading p.f. load. E 0 V % Reg X100 V MMF Method: From the O.C.C. graph, find (1) I f1 - Field current required to produce rated voltage per phase. (2) I f2 - Field current required to produce rated current per phase during S.C. test. I f = {I f1 2 +I f2 2-2I f1 I f2 cos(90±φ)} 1/2 Where + for lagging p.f. load, - for leading p.f. load. 5

6 Now determine V o corresponding to I from graph. % Reg E 0 V X100 V EMF METHOD: S. No. P.F (lag) E o (V) Reg. (%) P.F (lead) E o (V) Reg. (%) MODEL CALCULATION: (EMF method) MODEL GRAPH: 6

7 MMF METHOD: S. No. P.F. (lag) I f (A) E 0 (V) Reg. (%) P.F. (lead) I f (A) Reg. (%) E 0 (V) MODEL CALCULATION: (MMF method) RESULT: REVIEW QUESTIONS: 1. Define Regulation 2. What is meant by pessimistic method? 3. Which method is called as optimistic method? 4. What are the advantages of EMF and MMF method? 5. List out the various methods used to predetermine the regulation. 7

9 O.C. TEST: 1. Using the 200 ohm potential divider, current in field circuit is increased in steps of 0.1A and at each step the alternator induced voltage indicated by voltmeter and the corresponding field current (I f ) are noted in tabular column. 2. This procedure is continued until the alternator voltage is 120% of its rated voltage. 3. After completing O.C. Test, the potential divider and motor field rheostat are brought to its minimum position. 4. After completing the experiment, calculate Synchronous Impedance, Synchronous Reactance & Regulation using the formulae given. 5. Using the data, Plot the graph between E o Vs I f. S.C. TEST: 1. The alternator terminals are short circuited by closing TPST switch through an ammeter. 2. The rated current is made to flow through the armature of the stator windings by carefully adjusting 220 ohms potential divider from the minimum position. 3. After completing the experiment, calculate the Load current, Field Current and Regulation. 4. Using the data, Plot the graph I sc vs I f and % Regulation vs Power Factor for both the EMF and MMF methods. CIRCUIT DIAGRAM: FUSE CALCULATION: MOTOR 9

10 ALTERNATOR TABULATION: O.C. TEST S.C TEST S. No. I f (A) V g(1-1) (V) V g (ph) (V) S.C TEST S. No. I f (A) I SC (A) FORMULAE USED: 1. Synchronous Impedance (ph),z S = (Open circuit voltage/phase) / (Short circuit current/phase) (For the same field current) 2. Synchronous Reactance (Ph), X S = [(Z S ) 2 -(R a ) 2 ] 1/2 PROCEDURE ZPF TEST 1. Connections are made as per the circuit diagram. 2. Close the D. P. S. T. switch. 3. Start the D. C. motor (prime mover) with the help of three point starter. 4. The field rheostat of the motor should be adjusted to bring the motor speed equivalent to the synchronous speed of the alternator. 5. Close the D. P. S. T. switch in the field circuit of the alternator. 6. The potential divider of the alternator field is varied till the ammeter in the alternator circuit reads rated current of the alternator. 7. Reduce the field current on the alternator side to zero value. 8. Reduce the speed by adjusting the motor field rheostat. 9. Open all the switches. 10

11 TABULAR COLOUMN ZPF test Sl. No Field current, I f (A) Voltage, E 0 (V) FORMULAE TO BE USED At Lagging power factor E 0 = (V cosφ + I a R a ) 2 + (V sinφ + IX L ) 2 Percentage Regulation = ((E 0 V) / V) 100 I f = I f1 2 + I f I f1 I f2 cos(180 (90 - ф)) Percentage regulation = ((E 0 V) / V) 100 POWER FACTOR PERCENTAGE VOTAGE REGULATION ZPF METHOD ASA METHOD 0.2 LAG UNITY LEAD RESULT The predetermination of percentage of voltage regulation of given alternator using ZPF and ASA methods were found. 11

13 PRECAUTION 1. All the switches should be kept open at the time of starting the experiment. 2. There should be no load at the time of starting the experiment. 3. The motor field rheostat should be kept at minimum resistance position. PROCEDURE 1. Connections are made as per the circuit diagram. 2. The D. P. S. T. switch should be closed. 3. The motor should be started with the help of three point starter. 4. The motor speed should be made equivalent to alternator synchronous speed with the help of field rheostat of the motor. 5. The auto transformer should be varied to get maximum variations in the meter. 6. All the readings should be noted down. TABULAR COLOUMN S. No. MAXIMUM VOLTAGE (V) MINIMUM VOLTAGE (V) MAXIMUM CURRENT (A) MINIMUM CURRENT (A) FORMULAE X d = (Maximum Voltage / 3 ) / Minimum current X q = (Minimum voltage / 3) / Maximum current d direct axis component q quadrature axis component RESULT The direct axis and quadrature axis component of the three phase alternator have been calculated. 13

14 MEASUREMENTS OF NEGATIVE SEQUENCE IMPEDANCE AND ZERO SEQUENCE IMPEDANCE OF ALTERNATORS AIM To obtain the negative sequence and zero sequence reactance of a given three phase alternator. APPARATUS REQUIRED S. No. Name of the apparatus Range Type Quantity 1 Voltmeter (0 300 V) M. I. 1 2 Voltmeter (0 150 V) M. I. 1 3 Ammeter (0 20 A) M. I. 1 4 Ammeter (0 10 A) M. I. 1 5 Ammeter (0 2 A) M. I. 1 6 Wattmeter 300 V, 10 A UPF 1 7 Rheostat 220 Ω, 2 A Single phase Auto Transformer (0 270 V) Tachometer ( rpm) Digital 1 NEGATIVE SEQUENCE PARAMETERS PRECAUTION 1. All the switches should be kept open at the time of starting the experiment. 2. The D. C. motor field rheostat should be kept at minimum resistance position at the time of starting the experiment. 3. The generator field potential divider should be kept at minimum potential position. PROCEDURE 1. Connections are made as per the circuit diagram. 2. The motor should be started with the help of three point starter. 3. The motor speed should be made equivalent to alternator synchronous speed with the help of field rheostat of the motor. 4. The D. P. S. T. switch on the alternator field side should be closed. 5. The alternator field potential divider must be varied in steps. 6. At each step, all the meter readings should be noted down. 7. The above procedure should be repeated till the ammeter reads the rated alternator current. 14

15 TABULAR COLOUMN NEGATIVE NEGATIVE S. No. VOLTAGE V RY (V) CURRENT I SC (A) POWER (W) SEQUENCE IMPEDANCE SEQUENCE REACTANCE AVERAGE (X 2 ) (Z 2 ) (X 2 ) FORMULAE Z 2 = V RY / (3 I SC ) X 2 = Z 2 (W 2 / (V RY I SC )) ZERO SEQUENCE PARAMETERS PRECAUTION 1. All the switches must be kept open at the time of starting the experiment. 2. The auto transformer should be kept at minimum potential position. PROCEDURE 1. Connections are made as per the circuit diagram. 2. The auto transformer should be varied in steps. 3. At each step the meter readings should be noted down. 4. The above procedure should be repeated till the ammeter reads rated current of the alternator. TABULAR COLOUMN S. No OBSERVATION VOLTAGE CURRENT (V) (A) CALCULATION X 0 = (3 V) / I AVERAGE X 0 15

16 RESULT Thus the negative sequence reactance and zero sequence reactance have been determined. 16

17 AIM: V AND INVERTED V CURVES OFTHREE PHASE SYNCHRONOUS MOTOR To draw V and inverted V curves for given three phase synchronous motor APPARATUS REQUIRED: S. No. Name of the apparatus Range Type Quantity 1 Voltmeter (0 600 V) M. I. 1 2 Ammeter (0 10 A) M. I. 1 3 Ammeter (0 2 A) M. C. 1 4 Wattmeter 600 V, 10 A UPF 1 5 Tachometer ( rpm) Digital 1 6 Three phase Auto Transformer (0 470 V) Rheostat 950 Ω, 0.8 A - 1 CIRCUIT DIAGRAM: 17

18 PRECAUTION 1. All the switches should be kept open at the time of starting the experiment. 2. The potential divider in the field circuit of synchronous motor should be kept at minimum potential position. PROCEDURE 1. Connections are made as per the circuit diagram. 2. Close the T. P. S. T. switch. 3. The auto transformer is varied gradually to start the motor. 4. The auto transformer is adjusted till the voltmeter reads the rated voltage of the synchronous motor. 5. Close the D. P. S. T. switch and increase the field current. 6. At no load condition, increase the field current in steps and note down the corresponding armature current. 7. The potential divider is brought to the minimum potential position. 8. Repeat the same procedure for different load conditions. 9. Reduce the load on the motor. 10. Reduce the field current to zero value. 11. Reduce voltage by varying auto transformer. 12. Open all the switches. TABULAR COLOUMN S. No. I a (A) I f (A) WATTMETER READING W 1 (W) W 2 (W) W 1 + W 2 (W) POWER FACTOR 18

19 GRAPH Field current, I f Vs Armature current, I a Field current, I f Vs Power factor, cosф RESULT Thus the V and inverted V curves of the given synchronous motor have been drawn. 19

20 LOAD TEST ON THREE PHASE INDUCTION MOTOR AIM: To conduct the direct load test on a given 3-phase induction motor and plot the performance characteristics of the machine. NAME PLATE DETAILS: Rated voltage = Rated power = Rated current = Frequency = Rated speed = APPARATUS REQUIRED: S. No. Apparatus Range & Type Quantity 1 3 Ф Induction Motor - 1 No. 2 3 Ф Autotransformer 415 V (0 470 V), 12.4 KVA 1 No. 3 Voltmeter AC (0-600 V), MI 1 No. 4 Ammeter AC (0-10 A), MI 1 No. 5 Wattmeter 600 V, 10 A, UPF ( Double Element) 1 No. 6 Tachometer, TPST Switch - 1 each 7 Connecting wires & fuse - As Required THEORY: Squirrel cage induction motors are so called because of the rotor construction, which is the most rugged construction. The rotor conductors are heavy bars of copper, Aluminium that are permanently shortcircuited. The rotor slots are given a slight skew for quieter operation and to prevent the locking tendency of the rotor. The direct load test is conducted on the squirrel cage induction motor to plot its performance characteristics under loading condition. This is more accurate than the predetermination techniques as the latter doesn t take into account the effect of factors such as temperature, which cause significant change in its operation. PRECAUTIONS: (Not to be included in the Record) 1. Remove the fuse carrier before starting wiring 2. Fuse rating calculation: Since this is load test, the required fuse rating is only 120% of the rated current of the motor 3. Before switching on the supply ensure the motor in on no load condition and the autotransformer is in the minimum position 4. Replace the fuse carriers with appropriate fuse wires after the circuit connections are checked by the staff in charge 20

21 PROCEDURE: 1. The connections are given as shown in circuit diagram. 2. The 3Ф ac supply is switched ON to the motor using the starter. 3. Under this load condition, one set of readings of the ammeter (I L ), voltmeter (V L ), wattmeter (W), spring balance and the speed (N) of motor are noted down. 4. Now the mechanical load on motor is increased in regular steps in such a way that the current drawn by the motor increases in steps of 1A. 5. At each step of loading, the entire meter readings are noted down in the tabular column. 6. This procedure is continued until the current drawn by the motor equals 120% of its rated value. 7. After the experiment is completed, the main supply is switched OFF. 8. After completing the experiment, Torque, Output Power, Power Factor, % Slip and % efficiency are calculated by using the given formulae. 9. Using the obtained data, the plot of % efficiency Vs Output power,.% Slip vs Output power, Speed vs Output power, power factor vs Output power, Line current vs Output power and Slip vs torque. CIRCUIT DIAGRAM: FUSE CALCULATION: 21

22 TABULAR COLUMN: S. No. Line voltage V L (V) Line current I L (A) Input power (W) Speed (RPM) Spring balance reading F 1 F 2 F 1 ~ F 2 (Kg) (Kg) (Kg) Torque (Nm) Output power (W) P.F % %Slip MODEL GRAPHS: 22

23 FORMULAE USED: 1. Torque = 9.81*R*(F 1 ~F 2 ) N-m R Radius of the brake drum including belt thickness. (m) F 1, F 2 spring balance readings in kg. 2. Output Power = 2πNT/60 W T Torque in N-m N Speed in rpm. 3. Power Factor = Input Power / 3 V L* I L Watt 4. % Efficiency = (Output/Input)* 100 % 5. % Slip = [(N s -N)/N s ]*100% MODEL CALCULATION: RESULT: REVIEW QUESTIONS: 1. What is Skewing? 2. What is cogging? 3. What is crawling? 4. Define Slip 23

24 AIM: NO LOAD AND BLOCKED ROTOR TESTS ON A THREE PHASE INDUCTION MOTOR To draw the equivalent circuit diagram of the given 3-phase squirrel-cage induction motor by conducting no load and blocked rotor tests. NAME PLATE DETAILS: Rated Voltage (volts) : Rated Speed (R.P.M) : Rated Current (Amps) : Frequency (Hz) : Rated Output (H.P.) : APPARATUS REQUIRED: S. No. Apparatus Type Range Quantity 1 3 Ф Induction Motor Set up No 2 Voltmeter AC MI 3 Ammeter AC MI 4 3 Auto transformer - (0-600 V) (0-150 V) (0-10 A) (0-2 A) kva/ 415 (0-470 V) 1 each 1 each 1 No 5 Double Element Wattmeter V,10 A 1 No 6 Wattmeter LPF 600 V, 10 A 2 No 7 Connecting wires - - As Required THEORY: This is a predetermination technique used to calculate the characteristics of the motor under difference load conditions without actually loading the machine. The disadvantages of direct load test are (i) Absence of loads of large magnitude (ii) Wastage of large amount of power during testing. The results obtained are accurate enough for practical purposes. Therefore we apply the predetermination techniques to obtain the load characteristics of the machine. From the losses obtained in these tests the equivalent circuit of three phase induction motor can be determined and drawn. PRECAUTIONS: (Not to be included in record) 1. Remove the fuse carriers before wiring and start wiring as per the circuit diagram. 2. Fuse Calculations: This being a load test, the required fuse ratings are 120% of rated current. 3. The auto transformer should be kept in minimum position. 4. Replace the fuse carrier with appropriate fuse wires after the circuit connections are checked by the staff-in-charge. 24

25 PROCEDURE: NO LOAD (OPEN CIRCUIT) TEST: 1. The circuit connections are given as per the circuit diagram. 2. With the autotransformer starter in minimum position, the supply is switched ON and the voltage is gradually increased to rated voltage as the motor picks up speed. 3. All the meter readings are noted down for this no-load condition. 4. If anyone of the wattmeter shows a negative deflection, then bring the autotransformer to the minimum position, switch off the supply and reverse the current coil connection. Then apply rated voltage and record this wattmeter reading as a negative power. 5. The autotransformer is brought back to its minimum position and the mains are switched OFF. BLOCKED ROTOR TEST: 1. The circuit connections are given as per the circuit diagram, 2. With the autotransformer starter in minimum position and the rotor in blocked position, the mains are switched ON. 3. By varying the autotransformer, the input voltage is gradually increased such that the ammeter reads rated current. 4. All the meter readings are noted down in this condition. 5. The autotransformer is brought back to its minimum position and the mains are switched OFF. CIRCUIT DIAGRAM: NO LOAD TEST: FUSE CALCULATION: 25

26 BLOCKED ROTOR TEST: FUSE CALCULATION: TABULATION: NO LOAD (OPEN CIRCUIT) TEST: Open circuit Voltage V oc (volts) No load Current I oc (amps) No load Power W oc W 1 W 2 W oc = W 1 + W 2 (watts) BLOCKED ROTOR (SHORT CIRCUIT) TEST: Short circuit Voltage V sc (volts) Short circuit Current I sc (amps) Short circuit Power W sc (watts) 26

27 FORMULAE USED: No load Impedance (Z 0 )= V oc / (I oc / 3) No load Resistance( R 0 )= W oc /I oc 2 No load Reactance( X 0 )= [( Z 0 ) 2 - (R 0 ) 2 ] Power factor angle ( 0 )= cos -1 [W oc / ( 3V oc I oc )] Block rotor resistance (R BR )= W sc / I sc 2 Block rotor impedance( Z BR )= V sc / (I sc / 3) Block rotor reactance ( X BR )= [Z BR 2 R BR 2 ] R iwf Resistance accounting for rotational losses R 1 = 1.2*stator winding resistance (dc) P r = W oc I oc 2 R 1 (Since P r = P 0 3(I oc / 3) 2 R 1 ) R iwf = V oc 2 / P r X m = Magnetic reactance I iwf = V oc / R iwf I m = (I oc 2 - I iwf 2 ) 1/2 X m = V oc / I m EQUIVALENT CIRCUIT: MODEL CALCULATIONS: RESULT: The No-load and blocked rotor test was conducted on the given three-phase induction motor & the equivalent circuit is drawn. REVIEW QUESTIONS: 1. Prove that three phase power can be measure using two watt meters. 2. What is the necessity to have starter for three phase induction motor? 3. How mechanical load is represented in the equivalent circuit of induction motor? 4. Define Synchronous Speed. 5. Why induction motors cannot run at synchronous speed? 27

28 AIM: LOAD TEST ON SINGLE PHASE INDUCTION MOTOR To draw load characteristics of a single phase induction motor by conducting the load test APPARATUS REQUIRED: S. No. Apparatus Range Type Quantity 1 Single phase induction motor Single phase auto transformer (0 270 V) 1 3 Voltmeter (0-300) V MI 1 4 Ammeter (0-10 ) A MI 1 5 Wattmeter 300 V, 10 A, UPF 1 6 Connecting wires - - As required THEORY: Constructional of this motor is more or less similar to a poly phase induction motor, except that its stator is provided with a single phase winding. A centrifugal switch is used in some type of motor in order to cut out a winding, used in some type of motor, in order to cut out a winding, used in some type of motors for starting squirrel cage rotor, when fed from a single phase only alternating one which alternates along one phase axis only. Now, alternating or pulsating flux acting on a stationary squired cage rotor cannot produce rotation that is why a single phase motor is not self starting. FORMULAE 1. Torque ( T )=S*9.81*R Nm 2. Output power (P o ) = 2πNT/60 watts 3. Efficiency (η) = Output power / Input power X 100 % 4. Slip S = (Ns Nr) / Ns * 100 % 5. Synchronous speed Ns = 120 f / P rpm 6. Power factor cos Φ = P in / (V L *I L ) where, R Radius of brake drum. V L Line Voltage 28

30 S. No 1 TABULAR COLUMN: Voltage V L (V) Current I L (A) Input Power P in (W) Spring Balance Reading S=S 1 S 2 S 1 (Kg) S 2 (Kg) (Kg) Circumference of the Brake drum = m. Speed N (rpm) Torque T (Nm) Output Power P o (W) Efficiency % SLIP S Power Factor Cos Φ Radius of Brake Drum Circumference = 2 π R = Radius = R=Circumference / (2 π) = meter MODEL CALCULATION 30

31 MODEL GRAPH RESULT: 31

32 NO LOAD AND BLOCKED ROTOR TESTS ON SINGLE PHASE INDUCTION MOTOR AIM To draw the equivalent circuit of the given three phase induction motor by conducting no load and blocked rotor test. APPARATUS REQUIRED S. No. Apparatus Range Type Quantity 1 Single phase induction motor Single phase auto transformer (0 270 V) 1 3 Voltmeter 4 Ammeter 5 Wattmeter (0-300) V (0-150) V (0-10) A (0-10) A 150 V, 5 A, LPF 300 V, 10 A, UPF MI 1 MI 1 1 each 6 Connecting wires - - As required CIRCUIT DIAGRAM NO LOAD TEST 32

34 TABULAR COLOUMN OPEN CIRCUIT TEST Sl. No. Voltage, Vo (V) Current, Io (A) Power, Wo (W) SHORT CIRCUIT TEST Sl. No. Voltage, V SC (V) Current, I SC (A) Power, W SC (W) FORMULAE W 0 = V 0 I 0 COS ф 0 COS ф 0 = W 0 / (V 0 I 0 ) I C = I 0 COS ф 0 I m = I 0 SIN ф 0 R 0 = V O / I C X 0 = V 0 / I m X 2 = X eq / 2 R 2 = R eq - R 1 R 0 = V 0 / (I 0 COS ф 0 ) X 0 = V 0 / (I 0 SIN ф 0 ) 2 R 01 = W SC / I SC X 01 = Z R 01 R 2 = R 01 (R m ll el R s ) X 2 = X 01 (X m ll el (X S - X L )) X S = Z 2 2 S R S X m = Z 2 2 m R m Z SC = V SC / I SC 2 R SC = W SC / I SC X SC = Z 2 2 SC R SC Slip = (N s - N r ) / N s R l 2 = R SC R 1 X l 2 = X 1 = X SC / 2 X m = 2 (X 0 X 1 (X l 2 / 2)) 34

35 RESULT Thus the equivalent circuit of single phase induction motor has been drawn using no load and blocked rotor tests. 35

### ELECTRICAL 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

### Synchronous 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

### Synchronous 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

### SYLLABUS 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

### Electrical 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

### 694 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

### SPEED 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 :

### 10. 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

### SRI 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?

### Sharjah 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

### INDUCTION 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

### The 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

### DHANALAKSHMI SRINIVASAN INSTITUTE OF RESEARCH AND TECHNOLOGY SIRUVACHUR

DHANALAKSHMI SRINIVASAN INSTITUTE OF RESEARCH AND TECHNOLOGY SIRUVACHUR 621 113. DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING QUESTION BANK (PART B) YEAR/SEMESTER :III/V SUB CODE/SUB NAME : EE2302/ELECTRICAL

### Lecture 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

### To 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

### EXPERIMENT 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

### VIII. 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,

### ELEN 236 DC Motors 1 DC Motors

ELEN 236 DC Motors 1 DC Motors Pictures source: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/mothow.html#c1 1 2 3 Some DC Motor Terms: 1. rotor: The movable part of the DC motor 2. armature: The

EE6401 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,

### ROTOR 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

### Unit 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.

### INDUCTION MOTOR. There is no physical electrical connection to the secondary winding, its current is induced

INDUCTION MOTOR INTRODUCTION An induction motor is an alternating current motor in which the primary winding on one member (usually the stator) is connected to the power source and a secondary winding

### EE6401 ELECTRICAL MACHINES I UNIT I: MAGNETIC CIRCUITS AND MAGNETIC MATERIALS PART: A 1. Define EMF and MMF. 2. Name the main magnetic quantities

EE6401 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,

### INTRODUCTION Principle

DC Generators INTRODUCTION A generator is a machine that converts mechanical energy into electrical energy by using the principle of magnetic induction. Principle Whenever a conductor is moved within a

### CHAPTER 7 INDUCTION MOTOR

CHAPTE 7 INDUCTION MOTO Summary: 1. Induction Motor Construction. Basic Induction Motor Concepts - The Development of Induced Torque in an Induction Motor. - The Concept of otor Slip. - The Electrical

### EFFECT 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

### Fachpraktikum Elektrische Maschinen. Theory of Induction Machines

Fachpraktikum Elektrische Maschinen Theory of Induction Machines Prepared by Arda Tüysüz January 2013 Fundamentals Induction machines (also known as asynchronous machines) are by far the most common type

### UNIT I D.C. MACHINES PART A. 3. What are factors on which hysteresis loss? It depends on magnetic flux density, frequency & volume of the material.

EE6352-ELECTRICAL ENGINEERING AND INSTRUMENTATION UNIT I D.C. MACHINES PART A 1. What is prime mover? The basic source of mechanical power which drives the armature of the generator is called prime mover.

### EC2259 ELECTRICAL ENGINEERING AND CONTROL SYSTEM LABORATORY MANUAL ANNA UNIVERSITY -CHENNAI

EC2259 ELECTRICAL ENGINEERING AND CONTROL SYSTEM LABORATORY LABORATORY MANUAL FOR IV SEMESTER B.E (ECE) (FOR PRIVATE CIRCULATION ONLY) ANNA UNIVERSITY -CHENNAI DEPARTMENT OF ELECTRICAL AND ELECTRONICS

### GENERATOR DATA SEPTEMBER 29, 2015

Page 1 of 10 GENERATOR DATA SEPTEMBER 29, 2015 For Help Desk Phone Numbers Click here Spec Information Generator Specification Frame: 685 Type: SR4 No. of Bearings: 1 Winding Type: RANDOM WOUND Flywheel:

### Module 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

### Revised October 6, EEL 3211 ( 2008, H. Zmuda) 6. Induction Motors 1

Induction Motors Revised October 6, 008 EEL 311 ( 008, H. Zmuda) 6. Induction Motors 1 Induction Motors: We just learned how damper or amortisseur windings on a synchronous motor could develop a starting

### The Wound-Rotor Induction Motor Part III

Experiment 5 The Wound-Rotor Induction Motor Part III OBJECTIVE To observe the characteristics of the wound-rotor induction motor at no-load and full-load. To observe speed control using an external variable

### Question Number: 1. (a)

Session: Summer 2008 Page: 1of 8 Question Number: 1 (a) A single winding machine cannot generate starting torque. During starting the switch connects the starting winding via the capacitor. The capacitor

### Asynchronous slip-ring motor synchronized with permanent magnets

ARCHIVES OF ELECTRICAL ENGINEERING VOL. 66(1), pp. 199-206 (2017) DOI 10.1515/aee-2017-0015 Asynchronous slip-ring motor synchronized with permanent magnets TADEUSZ GLINKA, JAKUB BERNATT Institute of Electrical

### SIMULINK Based Model for Determination of Different Design Parameters of a Three Phase Delta Connected Squirrel Cage Induction Motor

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-issn: 2278-1676,p-ISSN: 2320-3331, Volume 7, Issue 4 (Sep. - Oct. 2013), PP 25-32 SIMULINK Based Model for Determination of Different

### Permanent Magnet DC Motor Operating as a Generator

Exercise 2 Permanent Magnet DC Motor Operating as a Generator EXERCIE OBJECTIVE When you have completed this exercise, you will be familiar with the construction of permanent magnet dc motors as well as

### Motor Protection Fundamentals. Motor Protection - Agenda

Motor Protection Fundamentals IEEE SF Power and Energy Society May 29, 2015 Ali Kazemi, PE Regional Technical Manager Schweitzer Engineering Laboratories Irvine, CA Copyright SEL 2015 Motor Protection

### 2 Principles of d.c. machines

2 Principles of d.c. machines D.C. machines are the electro mechanical energy converters which work from a d.c. source and generate mechanical power or convert mechanical power into a d.c. power. These

### Chapter 3.2: Electric Motors

Part I: Objective type questions and answers Chapter 3.2: Electric Motors 1. The synchronous speed of a motor with 6 poles and operating at 50 Hz frequency is. a) 1500 b) 1000 c) 3000 d) 750 2. The efficiency

### Three-Phase Induction 208V Motor with MATLAB

EXPERIMENT Induction motor with Matlab Three-Phase Induction Motors 208V LL OBJECTIVE This experiment demonstrates the performance of squirrel-cage induction motors and the method for deriving electrical

DC MOTORS DC Motors DC Motor is a Machine which converts Electrical energy into Mechanical energy. Dc motors are used in steel plants, paper mills, textile mills, cranes, printing presses, Electrical locomotives

### Design of Low Speed Axial Flux Permanent Magnet Generators for Marine Current Application. Sanjida Moury. Supervised by Dr.

Design of Low Speed Axial Flux Permanent Magnet Generators for Marine Current Application Sanjida Moury Supervised by Dr. Tariq Iqbal Faculty of Engineering and Applied Science Memorial University of Newfoundland

### ASSISTANT EXECUTIVE ENGINEER (ELEC.) QUESTIONS & ANSWERS

ASSISTANT EXECUTIVE ENGINEER (ELEC.) QUESTIONS & ANSWERS 1. A ceiling fan uses A) split-phase motor B) capacitor start and capacitor run motor C) capacitor start motor D) universal motor 2. High frequency

### 1. A ceiling fan uses A) split-phase motor B) capacitor start and capacitor run motor C) capacitor start motor D) universal motor Ans: C

1. A ceiling fan uses A) split-phase motor B) capacitor start and capacitor run motor C) capacitor start motor D) universal motor 2. High frequency transformers sometimes make use of ferrite cores because

### Application Information

Moog Components Group manufactures a comprehensive line of brush-type and brushless motors, as well as brushless controllers. The purpose of this document is to provide a guide for the selection and application

### Inverter control of low speed Linear Induction Motors

Inverter control of low speed Linear Induction Motors Stephen Colyer, Jeff Proverbs, Alan Foster Force Engineering Ltd, Old Station Close, Shepshed, UK Tel: +44(0)1509 506 025 Fax: +44(0)1509 505 433 e-mail:

### EE6352-ELECTRICAL ENGINEERING AND INSTRUMENTATION UNIT I D.C. MACHINES PART A

EE6352-ELECTRICAL ENGINEERING AND INSTRUMENTATION 1. What is prime mover? UNIT I D.C. MACHINES PART A The basic source of mechanical power which drives the armature of the generator is called prime mover.

### Permanent Magnet DC Motor

Renewable Energy Permanent Magnet DC Motor Courseware Sample 86357-F0 A RENEWABLE ENERGY PERMANENT MAGNET DC MOTOR Courseware Sample by the staff of Lab-Volt Ltd. Copyright 2011 Lab-Volt Ltd. All rights

### Measurement and Analysis of the Operation of a Single-Phase Induction Motor

Measurement and Analysis of the Operation of a Single-Phase Induction Motor In class I have shown you the carcass of a four-pole, single phase, ¼ HP motor in varying stages of disassembly. In this lab,

### P734H - Technical Data Sheet

P734H - Technical Data Sheet Standards STAMFORD industrial alternators meet the requirements of the relevant parts of the BS EN 60034 and the relevant section of other international standards such as BS5000,

### The Wound-Rotor Induction Motor Part II

Experiment 2 The Wound-Rotor Induction Motor Part II OBJECTIVE To determine the starting characteristics of the wound-rotor induction motor. To observe the rotor and stator currents at different motor

### MS.RAJA ELGADFY/ELECTROMAGENETIC PAPER3

MSRAJA ELGADFY/ELECTROMAGENETIC PAPER3 1- In Fig 91, A and B are two conductors on insulating stands Both A and B were initially uncharged X Y A B Fig 91 (a) Conductor A is given the positive charge shown

### Motor Basics AGSM 325 Motors vs Engines

Motor Basics AGSM 325 Motors vs Engines Motors convert electrical energy to mechanical energy. Engines convert chemical energy to mechanical energy. 1 Motors Advantages Low Initial Cost - \$/Hp Simple &

### U of I Seminar Page 1 TAK 9 / 16 / Inductions Motors

U of I Seminar Page 1 TAK 9 / 16 / 2016 Inductions Motors Overview of history, physical design, basic theory, and performance with emphasis on aircraft applications Typical large induction motor circa

### To 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

### Induction Motor Control

Induction Motor Control A much misunderstood yet vitally important facet of electrical engineering. The Induction Motor A very major consumer of electrical energy in industry today. The major source of

### Maryland Level 2, Level 3 & Level 4 Interconnection Request Application Form (Greater than 10 kw to 10 MW or less)

Maryland Level 2, Level 3 & Level 4 Interconnection Request Application Form (Greater than 10 kw to 10 MW or less) Interconnection Customer Contact Information Name: Address: City: Telephone (aytime):

### CHAPTER 31 SYNCHRONOUS GENERATORS

Source: POWER GENERATION HANDBOOK CHAPTER 31 SYNCHRONOUS GENERATORS Synchronous generators or alternators are synchronous machines that convert mechanical energy to alternating current (AC) electric energy.

### PhysicsAndMathsTutor.com 1

Q1. A battery of emf 9.0 V and internal resistance, r, is connected in the circuit shown in the figure below. (a) The current in the battery is 1.0 A. (i) Calculate the pd between points A and B in the

### INDUCED ELECTROMOTIVE FORCE (1)

INDUCED ELECTROMOTIVE FORCE (1) Michael Faraday showed in the 19 th Century that a magnetic field can produce an electric field To show this, two circuits are involved, the first of which is called the

### AGN Unbalanced Loads

Application Guidance Notes: Technical Information from Cummins Generator Technologies AGN 017 - Unbalanced Loads There will inevitably be some applications where a Generating Set is supplying power to

### Figure 1: Relative Directions as Defined for Faraday s Law

Faraday s Law INTRODUCTION This experiment examines Faraday s law of electromagnetic induction. The phenomenon involves induced voltages and currents due to changing magnetic fields. (Do not confuse this

### Induction type Energy meter Construction

Induction type Energy meter Construction The four main parts of an energy meter are: Driving system Moving system Braking system and Registering system The construction is as shown below: Fig. Construction

### Código 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

### Basic Instruments Introduction Classification of instruments Operating principles Essential features of measuring

Basic Instruments www.worldwebsites8.blogspot.com Introduction Classification of instruments Operating principles Essential features of measuring instruments PMMC Instruments Moving Iron instruments Introduction

### Armature Reaction and Saturation Effect

Exercise 3-1 Armature Reaction and Saturation Effect EXERCISE OBJECTIVE When you have completed this exercise, you will be able to demonstrate some of the effects of armature reaction and saturation in

### UCI224C - Winding 06. Technical Data Sheet APPROVED DOCUMENT

UCI224C - Winding 06 Technical Data Sheet UCI224C SPECIFICATIONS & OPTIONS STANDARDS Stamford industrial generators meet the requirements of BS EN 60034 and the relevant section of other international

### Three Phase / Single Phase Motors &Circuits NRE 8. Student Resource Package No: NRE8.

Three Phase / Single Phase Motors &Circuits NRE 8 Student Resource Package No: NRE8. Delivery: Competence in this training program can be achieved through either a formal education setting or in the workplace

### Permanent Magnet Machines for Distributed Generation: A Review

Permanent Magnet Machines for Distributed Generation: A Review Paper Number: 07GM0593 Authors: Tze-Fun Chan, EE Department, The Hong Kong Polytechnic University, Hong Kong, China Loi Lei Lai, School of

### MAGNETIC EFFECTS OF ELECTRIC CURRENT

MAGNETIC EFFECTS OF ELECTRIC CURRENT It is observed that when a compass is brought near a current carrying conductor the needle of compass gets deflected because of flow of electricity. This shows that

### Introduction to Variable Speed Drives. Pekik Argo Dahono Electrical Energy Conversion Research Laboratory. Institute of Technology Bandung

Introduction to Pekik Argo Dahono Electrical Energy Conversion Research Laboratory Institute of Technology Bandung Why Electric Drives Electric drives are available in any power. They cover a wide range

### 34 th Hands-On Relay School

34 th Hands-On Relay School Generation Track Overview Lecture Generator Design, Connections, and Grounding 1 Generator Main Components Stator Core lamination Winding Rotor Shaft Poles Slip rings Stator

### Faraday's Law of Induction

Purpose Theory Faraday's Law of Induction a. To investigate the emf induced in a coil that is swinging through a magnetic field; b. To investigate the energy conversion from mechanical energy to electrical

### PSNH INTERCONNECTION REQUEST

PSNH INTERCONNECTION REQUEST Send the completed Interconnection Request and required attachments to: Public Service of New Hampshire Attn: Michael Motta, Senior Engineer Supplemental Energy Sources P.

### Induction motors advantages of induction motors squirrel cage motor

AC Motors With AC currents, we can reverse field directions without having to use brushes. This is good news, because we can avoid the arcing, the ozone production and the ohmic loss of energy that brushes

### Chapter 22: Electric motors and electromagnetic induction

Chapter 22: Electric motors and electromagnetic induction The motor effect movement from electricity When a current is passed through a wire placed in a magnetic field a force is produced which acts on

### EE 742 Chap. 7: Wind Power Generation. Y. Baghzouz Fall 2011

EE 742 Chap. 7: Wind Power Generation Y. Baghzouz Fall 2011 Overview Environmental pressures have led many countries to set ambitious goals of renewable energy generation. Wind energy is the dominant renewable

### POWER METER. my2010 (c)

POWER METER ELECTRIC POWER Electric power is the rate at which electric energy is transferred by an electric circuit. The SI unit of power is the watt. When electric current flows in a circuit, it can

### MAIN ELECTRIC MOTOR 900 HP 4000 V 60 HZ MAKE: RELIANCE ELECTRIC

MAIN ELECTRIC MOTOR 9 HP 4 V 6 HZ MAKE: RELIANCE ELECTRIC E.I DUPONT DE NEMOURS & CO. COOPER RIVER PROJECT PROJ: 76P PO: # LCRCP-5W RELIANCE FRAME HP TYPE PHASE HERTZ RPM SALES ORDER B795 588 9 P 6

### UCI224F - Winding 311 Single Phase. Technical Data Sheet APPROVED DOCUMENT

- Technical Data Sheet SPECIFICATIONS & OPTIONS STANDARDS WINDINGS & ELECTRICAL PERFORMANCE All generator stators are wound to 2/3 pitch. This Stamford industrial generators meet the requirements of eliminates

### Lesson 16: Asynchronous Generators/Induction Generators

Lesson 16: Asynchronous s/induction s ET 332b Ac Motors, s and Power Systems et332bind.ppt 1 Learning Objectives After this presentation you will be able to: Explain how an induction generator erates List

### Chapter 2 PRINCIPLES OF AFPM MACHINES. 2.1 Magnetic circuits Single-sided machines Double-sided machines with internal PM disc rotor

Chapter 2 PRINCIPLES OF AFPM MACHINES In this chapter the basic principles of the AFPM machine are explained in details. Considerable attention is given to the magnetic circuits, windings, torque production,

### Chapter 20. Induced Voltages and Inductance

Chapter 20 Induced Voltages and Inductance Michael Faraday 1791 1867 Great experimental scientist Invented electric motor, generator and transformers Discovered electromagnetic induction Discovered laws

### English for Electrical Engineers

University of Kurdistan Department of Electrical & Computer Engineering English for Electrical Engineers H. Bevrani October, 2017 1 Contents Unit 1. Current, voltage and resistance... 3 Unit 2. Electrical

### Unit 32 Three-Phase Alternators

Unit 32 Three-Phase Alternators Objectives: Discuss the operation of a three-phase alternator. Explain the effect of rotation speed on frequency. Explain the effect of field excitation on output voltage.

### Unit-I MEASURING INSTRUMENTS

Unit-I MEASURING INSTRUMENTS 1.1 Definition of instruments: An instrument is a device in which we can determine the magnitude or value of the quantity to be measured. The measuring quantity can be voltage,

### Update. This week A. B. Kaye, Ph.D. Associate Professor of Physics. Michael Faraday

10/26/17 Update Last week Completed Sources of Magnetic Fields (Chapter 30) This week A. B. Kaye, Ph.D. Associate Professor of Physics (Chapter 31) Next week 30 October 3 November 2017 Chapter 32 Induction

### FLAT LINEAR INDUCTION PUMPS

Creative Engineers, Inc. PO Box 206 Phoenix MD 21131 www.creativeengineers.com Phone (443) 807-1202 Fax (410) 683-9707 info@creativeengineers.com FLAT LINEAR INDUCTION PUMPS www.creativeengineers.com Creative

### Twenty Ways to Optimize Energy Efficiency in the Use of Induction Motors

Twenty Ways to Optimize Energy Efficiency in the Use of Induction Motors Course No: M06-021 Credit: 6 PDH A. Bhatia Continuing Education and Development, Inc. 9 Greyridge Farm Court Stony Point, NY 10980

### 2.0 CONSTRUCTION AND OPERATION 3.0 CHARACTERISTICS K. CO (HI-LO) Overcurrent Relay

41-100K 2.0 CONSTRUCTION AND OPERATION The type CO relays consist of an overcurrent unit (CO), either an Indicating Switch (ICS) or an ac Auxiliary Switch (ACS) and an Indicating Instantaneous Trip unit

### Almost 200 years ago, Faraday looked for evidence that a magnetic field would induce an electric current with this apparatus:

Chapter 21 Electromagnetic Induction and Faraday s Law Chapter 21 Induced EMF Faraday s Law of Induction; Lenz s Law EMF Induced in a Moving Conductor Changing Magnetic Flux Produces an E Field Inductance

### HCI 534E/544E - Winding 311 APPROVED DOCUMENT. Technical Data Sheet

HCI 34E/44E - Winding 311 Technical Data Sheet HCI34E/44E SPECIFICATIONS & OPTIONS STANDARDS TERMINALS & TERMINAL BOX Stamford industrial generators meet the requirements of BS EN 60034 and the relevant

### DERATING OF THREE-PHASE SQUIRREL-CAGE INDUCTION MOTOR UNDER BROKEN BARS FAULT UDC : Jawad Faiz, Amir Masoud Takbash

FACTA UNIVERSITATIS Series: Automatic Control and Robotics Vol. 12, N o 3, 2013, pp. 147-156 DERATING OF THREE-PHASE SQUIRREL-CAGE INDUCTION MOTOR UNDER BROKEN BARS FAULT UDC 621.313.33:621.316.1.017 Jawad

### Gener. Instructor: Center

PDHonline Course E404 (4 PDH) Alternating Current Gener rators and Motors Instructor: Lee Layton, P.E 2013 PDH Online PDH Center 5272 Meadow Estatess Drive Fairfax, VA 22030-6658 Phone & Fax: 703-988-0088

### 2. ELECTRIC MOTORS. 2.1 Introduction. 2.2 Motor Types

2. ELECTRIC MOTORS Syllabus Electric motors: Types, Losses in induction motors, Motor efficiency, Factors affecting motor performance, Rewinding and motor replacement issues, Energy saving opportunities

### HCI634J - Winding 311 and 312 APPROVED DOCUMENT. Technical Data Sheet

- Winding 311 and 312 Technical Data Sheet SPECIFICATIONS & OPTIONS STANDARDS Stamford industrial generators meet the requirements of BS EN 60034 and the relevant section of other international standards