GATE Electrical Machines – Previous Year Questions by Topic
GATE Electrical Machines (Electrical Engineering) previous year questions, topic by topic: Single phase transformer: equivalent circuit, phasor diagram, open circuit and short circuit tests, regulation and efficiency, Three-phase transformers: connections, vector groups, parallel operation, Auto-transformer, Electromechanical energy conversion principles, DC machines: separately excited, series and shunt, motoring and generating mode of operation and their characteristics, speed control of dc motors, Three-phase induction machines: 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 and more.
- Single phase transformer: equivalent circuit, phasor diagram, open circuit and short circuit tests, regulation and efficiency
- Three-phase transformers: connections, vector groups, parallel operation
- Auto-transformer, Electromechanical energy conversion principles
- DC machines: separately excited, series and shunt, motoring and generating mode of operation and their characteristics, speed control of dc motors
- Three-phase induction machines: 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
- Synchronous machines: cylindrical and salient pole machines, performance and characteristics, regulation and parallel operation of generators, starting of synchronous motors
- Types of losses and efficiency calculations of electric machines