On simulating dynamic behaviour of three phase induction machines with squirrel cage rotor

Abstract

A new time domain static network model of a three phase in duction motor with squirrel cage rotor is presented. Simulation of the dynamic behaviour of a machine fed through static power control equipment containing switching devices of one kind or another can be conveniently achieved using this model. The pro cedure is simple and can be applied, with considerable flexibility, to any system containing one or more induction machines. The model is inherently capable to account for iron losses as well. It is also suited for simulation of machine dynamics with un balance introduced in the stator electrical circuits by a fault, pro vided the structure of the windings remains unaltered. A similar network model can be derived to represent a machine with an asymmetrical internal fault which splits one or more stator phases into multiple sections with or without interconnections. A pre viously published model of a triac has been improved (Ghani 1981).