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Electrical Engineering  Modelling and Analysis of Electric Machines
Title: Modelling and Analysis of Electric Machines
Department: Electrical Engineering
Author: Dr. Krishna Vasudevan
University: IIT Madras
Type: WebLink
Abstract: This course deals with the development of mathematical models for electrical machines, suitable for transient analysis of machine performance. The course covers the following topics.
Basics of magnetic circuits - flux, mmf, reluctance - self, leakage, magnetizing and mutual inductances.
Analysis of magnetic circuits with airgap and permanent magnets.
Analysis of singly excited electromechanical system with linear magnetics - nonlinear magnetics using energy and co-energy principles. Derivation of force from co-energy.
Inductances of distributed windings - salient pole, cyclindrical rotor.
Analysis of the doubly excited rotational system with two coils on stator and two on rotor - electrical and mechanical equations.
Reference frames - stator attached alpha-beta, synchronous reference frame, arbitrary speed reference frame - power invariance and non-power invariance.
Derivation of dc machine systems from the generalized machine - electrical and mechanical equations.
Analysis of induction machine - synchronous reference frame - with currents as variables - with rotor flux as variables - basis for vector control - small signal modelling of induction machine.
Analysis of the alternator - synchronous reference frame - derivation of salient and cylindrical rotor machine phasor diagrams - three phase short circuit of alternator and various time constants.
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