Rotating Electrical Machines1. Unit-1
2. Unit-2
3. Unit-3
4. Unit-4
5. Unit-5
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Rotating Electrical Machines SyllabusUNIT-1 Electrical Machine Principles & Single phase Induction motors: Construction, Types, Characteristics of Single Phase Machines- Different types of single phase induction motors, Stepper motor, Reluctance motor, mechanical speed & frequency relation, mmf of concentrated & distributed winding, Emf equation, winding factors, torque & voltage in salient and non salient pole machines, Rotating magnetic field, Torque production in synchronous, induction machines UNIT-2 Synchronous Machines: Theory of non-salient pole machines, emf equation, basic synchronous machine models, equivalent circuit & phasor diagrams of synchronous machines, Saturation effect, armature reaction , open circuit short circuit & zero pf lag tests on synchronous machines, synchronous reactance, voltage regulation of alternators with constant synchronous reactance, load characteristics of alternator, Testing of synchronous generators, excitation systems of alternators. UNIT-3 Synchronous Machines: Generator input & output, characteristics parallel operation of synchronous machines, operation of synchronous machines with infinite bus bars, active & reactive power flows, general load diagram, V curve & Inverted V curves, steady state power angle characteristics, synchronizing torque, parallel operation of synchronous machines, effect of excitation on power factor, load sharing, effect of change in prime mover input. UNIT-4 Synchronous Machines: Theory of Salient pole synchronous machines, two-reaction theory, phasor diagram, power angle characteristics, determination of Xd, Xq, stiffness of coupling, synchronous condenser, circle diagrams of synchronous motors, hunting in synchronous machines, damper winding, Testing of synchronous motor. UNIT-5 Polyphase Induction Machines: Cage & slip ring motors, frequency transformation and energy conversion, equivalent circuit, phasor diagram, normalized torque-speed (slip) relationships, starting & speed control of induction motors, cogging & crawling, double cage induction motors, testing of induction motors, circle diagram, induction generators. |