Temperature Calculation of a Large Capacity of Line Start Permanent Magnet Synchronous Motor in the Starting Process

In this paper, the effect of transient starting process on temperature distribution and temperature rise of a large capacity line start permanent magnet synchronous motor (LSPMSM) is investigated. The starting process of motor is divided into several stages, and the transient temperature rise of each period is transformed into the steady state temperature rise calculation. The temperature variation of motor in starting process is calculated by finite element analysis software. The experimental results show the temperature rise in the starting process of large capacity LSPMSM, which provides a reference for the study of permanent magnets irreversible demagnetization.