ELECTRICAL MACHINE

SYLLABUS

1.Single phase transformer: equivalent circuit, phasor diagram, open circuit and short circuit tests, regulation and efficiency; 

2.Three phase transformers: connections, parallel operation; Auto transformer, Electromechanical energy conversion principles,

3.DC machines: separately excited, series and shunt, motoring and generating mode of operation and their characteristics, starting and speed control of dc motors; 

4.Three phase induction motors: principle of operation, types, performance, torque-speed characteristics, no-load and blocked rotor tests, equivalent circuit, starting and speed control; Operating principle of single phase induction motors; 

5.Synchronous machines: cylindrical and salient pole machines, performance, regulation and parallel operation of generators, starting of synchronous motor, characteristics; Types of losses and efficiency calculations of electric machines.