Single Phase Transformers — Performance Equivalent circuit — losses and efficiency-regulation.
Polyphase Induction Motors:Polyphase induction motors-construction details of cage and wound rotor machines-production of a rotating magnetic field — principle of operation — rotor emf and rotor frequency — rotor reactance, rotor current and pf at standstill and during operation. Characteristics of Induction Motors:Rotor power input, rotor copper loss and mechanical power developed and their inter relation-torque equation-deduction from torque equation — expressions for maximum torque and starting torque — torque slip characteristic — double cage and deep bar rotors — equivalent circuit — phasor diagram — crawling and cogging.
Circle Diagram of Induction Motors:Circle diagram-no load and blocked rotor tests-predetermination of performance-methods of starting and starting current and torque calculations.
Speed Control Methods:Speed control-change of frequency; change of poles and methods of consequent poles; cascade connection. Say, BPB Publishers 2.
Electric Machines —by I. Electromechanics-II transformers and induction motors S.
Kamakashaiah Hitech publishers. Electric machinery — A. Fitzgerald, C.
Kingsley and S. Umans, Mc Graw Hill Companies, 5th edition 2. Vote count: Tags electrical machines 2 pdf electrical machines 2 pdf free download Electrical Machines II electrical machines ii pdf.
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