Analysis and Simplified Model of Induction Motor for Automotive Applications

Akira Chiba
Tokyo Institute of Technology


In recent years, electrification of automotives has been a trend. There are attempts to replace PM motors with induction motors. PM motor analysis methods are well established with Jmag software. However, in the induction motor analysis, the calculation time tends to be long as the transient response is slow, determined by the slip frequency. The high efficiency induction motor tends to have small slip, thus, it is long. For example, one operation point needs a few minutes for PM motors, but a few days are needed in induction motors. Short cut analysis methods have been adapted, but it is better to understand what kind errors are likely. In addition, simplified description of induction motor model including magnetic saturation and frequency dependence of the secondary resistance are presented.

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