- Departments / Centres
Alternators - types and constructional features - emf equation - rotating magnetic field - armature reaction - load characteristics - predetermination of regulation by synchronous Impedance method, Ampere turn method, Zero Power factor method and ASA method. Basic ideas of two reaction theory - direct and quadrature axis reactances and their determination - phasor diagram and regulation of salient pole alternators - Expression for power developed as a function of torque angle - Parallel operation of alternators.
Synchronous motors: Synchronous machines on infinite bus bars - phasor diagram - V and inverted V curves - current and power circle diagrams - Hunting and its suppression - starting methods - synchronous condenser - reluctance motor.
Poly phase Induction motors - types and constructional features - principle of operation - phasor diagram - equivalent circuit - slip torque characteristics - effect of rotor resistance - circle diagram - starting and speed control.
High torque induction motors - Induction generators - Grid connected - Capacitor excited - Synchronous Induction Motor - Permanent Magnet Generators.
Single phase induction motors - types and constructional features - Principle of operation - equivalent circuit based on double revolving field theory - Universal motors - design features. Linear induction motors.