Finite-element models for cage induction motor analysis

Abstract

The authors describe two methods for predicting the performance of cage induction motors using finite elements. The first, which is suitable for steady-state analysis, uses a phaseband model for the stator together with a single-slot model for the rotor. These are used in an iterative procedure to determine the components of the familiar per-phase equivalent circuit. The second method, which is suitable for transient analysis, uses a time-stepped coupled circuit model for the machine, together with magnetostatic finite-element field solutions which are used to update the circuit parameters. Both methods are illustrated by comparison between experimental and computed characteristics for a four-pole 4.5 kW motor.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>