ANALYSIS and CONTROL OF ELECTROMAGNETIC DEVICES

 

EE 242���������������������������������������������������������������������������������� No. of hrs/week = 02 + 03

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Transformer:

 

Principle of operation, construction � Core and Shell type, EMF equation, Equivalent circuit, Losses, Efficiency and Voltage Regulation, OC and SC tests � determination of Equivalent circuit parameters, predetermination of Efficiency and Voltage Regulation, applications. - 8 hrs.

 

Three phase Induction Motor:

 

Rotating magnetic field, working principle, construction � Squirrel Cage and Slip ring type, rotor frequency, Torque equation, Torque � slip characteristics, Losses and Efficiency.

StartersAutotransformer and Star-Delta type starters.

Speed control � rotor resistance control and pole changing methods.

Applications. - 10 hrs

 

Synchronous Motor:

 

Principle of operation, construction, synchronous impedance, Back EMF, Effect of excitation, V and inverted V curves, Mechanical power developed, starting methods, synchronous condenser, applications. - 8 hrs.

 

References:

 

1.Langsdorf H., �Theory of Alternating Current Machines�, 2nd Edition, TMH, 1994.

2.Say M. G., �Alternating Current Machines�, 5th edition, ELBS, 1994.

3.Fitzerald, Kingsley and Umans, �Electrical Machinery�.

4.Stephen J. Champman, �Electrical Machinery Fundamentals�.

5.Parkersmith S, Problems in Electrical Engineering, Asia Publishing House, 1984

 

ANALYSIS AND CONTROL OF ELECTROMAGNETIC DEVICES LABORATORY

 

1.      Load test on single-phase transformer to determine Efficiency and Voltage Regulation.

2.      O.C. and S.C. tests on single-phase transformer to determine Equivalent circuit parameters, predetermination of Efficiency and Voltage Regulation.

3.      Separation of No load losses of 3-phase Induction motor.

4.      No load and Blocked rotor tests to determine Equivalent circuit parameters and performance characteristics of 3-phase Induction motor.

5.      Load test on 3-phase Induction motor.

6.      V and inverted V curves of Synchronous motor.