Electronics & Telecommunication Engineering(4th Sem.)
Electrical Machines__________________________________1. Unit-1
2. Unit-2
3. Unit-3
4. Unit-4
5. Unit-5
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Electrical Machines SyllabusUnit-1 DC Machines Construction of DC Machines, Generator action, EMF equations, Operating characteristics of DC generators, Motor action, Development of torque equation, Operating characteristics of DC Motors, Starting and speed control of DC Motors, Losses, Efficiency, Application. Unit-2 Transformer Construction, Principle of operation, Transformation ratio, equivalent circuit diagram, phasor diagram, efficiency, voltage regulation. Three phase transformer, types, different connections of three phase transformer Unit-3 Alternator Construction, Principle of operation, single phase & poly-phase winding pitch and distribution factor, emf equation, phasor diagram, synchronous reactance & impedance, voltage regulation by synchronous impedance methods. Unit-4 Phase Induction Motors Construction, Principle of operation, wound rotor and squirrel cage type rotors, equivalent circuit diagram, phasor diagram, torque-slip characteristics, Methods of starting & speed control of induction motors, losses, efficiency. Unit-5 Synchronous Motor and Drives Construction and principle of operation, phasor diagram, effect of excitation on power factor, synchronous condenser, methods of starting of synchronous motors, construction and starting methods of single phase induction motor, servo motor. |
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