永磁同步电机转子初始位置检测算法研究

Research on Initial Rotor Position Detection Algorithm of Permanent Magnet Synchronous Motor

针对永磁同步电机在启动时如果无法准确检测出转子的初始位置,导致在进行矢量控制时无法准确实现磁场定向,从而严重影响定位精度,同时也会对启动时的电流控制性能造成一定影响的问题,提出了一种采用有限状态机的转子初始位置检测算法,通过有限状态机控制转子位置自学习的流程,实现转子初始位置的读取。实验结果表明,使用上述算法进行初始定位,可以精确检测出转子的初始位置,且具有初始定位不存在抖动,易于编程实现等优点,提高了永磁同步电机启动时的电流控制性能。

As permanent magnet synchronous motor（ PMSM ）starts, if the initial rotor position cannot be accurately detected, PMSM is unable to accurately realize the field orientation of vector control and the positioning accuracy is reduced seriously, meanwhile the starting current control performance is effect. In this regard, an initial rotor position detection algorithm based on finite state machine was presented in the paper. The finite state machine was used to control the rotor position self - learning process and the initial rotor position was obtained. The experiment results show that, as using this algorithm, the initial rotor position can be accurately detected without the rotor jittering and it is easy to program, so the starting current control performance of PMSM is improved.