A Fast Calculation Method for Steady State Performance of High Speed Traction Induction Machine by Finite Element Analysis

Abstract

A high speed traction induction machine usually requires large rotor electrical time constant for high efficiency, which leads to unacceptably long transient response time in finite element analysis during machine design stage. To reduce the transient time, this paper proposes ramping up the magnitude of stator current excitation in finite element model from zero to full magnitude gradually, such that the DC component in rotor flux and torque can be greatly suppressed. The implementation of proposed method is very simple and it does not rely on machine parameters. Its performance is tested by a two-dimensional finite element model of an example induction machine. The result shows that the proposed method can significantly reduce the finite element calculation time.