Course Description : This course covers the electrical machines-three-phase induction motor and generator, single phase ac motors, synchronous generator and synchronous motor. It deals with the constructional details, operating principle, characteristics, testing methods of the above machines. Course content: Unit 1. Three Phase Induction Motor (15) 1.1 Constructional details – Yoke, stator, stator windings, and rotor – squirrel cage type and phase wound type. 1.2 Operation – Production of rotating magnetic field, operating principle, reversing the direction of rotation. 1.3 Stand still condition – equivalent circuit, starting current and starting torque. 1.4 Running condition - equivalent circuit, running current and torque. 1.5 Torque-Speed characteristics, effect of applied voltage on T-S characteristic, effect of rotor resistance on T-S characteristic. 1.6 Power stages, losses and efficiency 1.7 Starting methods – Direct On-line starting, Primary resistor method, Autotrans...
Electrical Engineering in simple way.
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