永磁同步牵引电动机的特殊性

Specificity of Permanent Magnet Synchronous Traction Motor

在阐述永磁同步牵引电动机与异步牵引电动机工作原理的差异以及永磁材料稳定性基础上,从转子不产生损耗带来的优点、过载能力、极数的选择、环境适应性、控制方式、不可逆退磁以及磁场不可调节所带来的缺点等方面,分析永磁同步牵引电动机的特殊性,并提出设计上应采取的措施,为永磁同步牵引电动机的设计提供参考。

Based on expounding the differences of working principle between permanent magnet synchronous traction motor and asyn- chronous traction motor and the description of stability for permanent magnet material, this paper analyzes the specificity of permanent magnet synchronous traction motor, including low loss of rotor, overload capacity, pole number selection, environmental adaptability, control mode, and the faults caused by irreversible demagnetization and the fact that magnetic fields cannot be adjusted. The relative measures in motor design are also proposed. It provides a reference for the design of permanent magnet synchronous traction motor.