PMSM转子初始位置检测分析及起动策略

PMSM initial rotor position detection and startup strategy

为准确获取永磁同步电机(PMSM)转子初始位置信息,实现电机的平稳起动,提出一种PMSM转子初始位置检测方法和基于增量式编码器的PMSM起动策略。从定子电流矢量的角度预定位PMSM转子,并导出定子电流矢量的产生方法,获取确定的转子位置信息。在此基础上,提出基于转子预定位的PMSM起动策略,并在起动过程中完成增量式编码器的校正。结果表明,所提起动策略可以准确检测转子的初始位置,实现电机的平稳起动与可靠运行。

An accurate method of initial rotor position detection and a strategy based on the incremental encoder are proposed to realize the smooth startup of PMSM（Permanent Magnet Synchronous Motor）. The rotor position of PMSM is pre-located according to the angle of stator current vector and the method for generating the stator current vector is deduced to acquire the accurate rotor position,according to which,a strategy of PMSM startup based on the pre-located initial rotor position is proposed. The incremental encoder is corrected during the PMSM startup. Results show that,the proposed strategy can accurately detect the initial rotor position and realize the smooth startup and reliable operation of PMSM.