永磁同步电动机转子位置检测研究

Research on Rotor Position Detection of Permanent Magnet Synchronous Motor

采用基于电机凸极的高频电流注入法跟踪转子位置,利用高频电流信号的注入,提取含有位置信息的电压信号;所提取的信号经过高通滤波器后,使用外差法对其进行处理,再通过卡尔曼滤波与PID算法结合的位置观测器,得到转子位置信息;最后对永磁同步电机转子位置检测进行仿真。

High-frequency （HF） current signal injection method was presented, the rotor position - tracking observer based on the spatial saliency - tracking scheme was also researched. The HF current signal was injected to make motor form high frequency voltage vector signals, because of amount of noises, the signals were passed through the high - pass filter and Kalman filter, and then the rotor position signal could be picked up without specialized mechanical position - senor. At last the simulation study for the rotor position self - sensing process of PMSM was discussed.