Thermal Analysis of Interior Permanent-Magnet Synchronous Motor by Electromagnetic Field - Thermal Linked Analysis

摘要

Interior permanent-magnet (IPM) synchronous motor possess special features. The high temperature, due to losses, can damage the windings' insulation and may cause demagnetization of permanent-magnet. Therefore, thermal analysis of the motor is a necessity. In this paper, electromagnetic field - thermal linked analysis of IPM synchronous motor is presented. First the electromagnetic field and thermal analysis are coupled in steady state. Then, the average losses are used to run transient thermal analysis. Thermal analysis is based on the heat transfer model. The heat source of motor is losses. Both experimental results and simulations show that the proposed electromagnetic field - thermal linked analysis is able to reliable predict the temperature variation of IPM synchronous motor.