永磁同步电机复合编码器参考信号自适应标定方法

Adaptive Calibration of Reference Signal for Permanent Magnet Synchronous Motor Hybrid Encoder

为实现永磁同步电机(PMSM)转子位置的准确检测,保证PMSM控制系统的可靠运行,提出一种PMSM复合编码器参考信号的自适应标定方法。在分析PMSM转子位置复合检测中绝对式、增量式两种工作模式的基础上,首先对编码器参考信号进行预标定,并对预标定结果进行误差分析。然后结合PMSM矢量控制策略下电流矢量角的特点,采用定步长和变步长相结合的方式对预标定结果进行自适应优化。仿真及实验结果表明,提出的方法可以快速、精确地完成编码器参考信号的标定,从而准确地获取转子位置信息,并且同时适用于电机空载和带载情况。

In order to improve the accuracy of rotor position detection for permanent magnet synchronous motor（PMSM） and guarantee reliable operation of PMSM control system, an adaptive calibration method of reference signal for PMSM hybrid encoder was proposed. Based on analyzing the absolute and incremental modes of PMSM rotor position hybrid detection, the reference signal of encoder was pre-calibrated and error analysis was conducted. Then, combined with the characteristics of current vector angle in PMSM vector control strategy, the pre-calibration results of reference signal were adaptively optimized by the combination of fixed-step and variable-step adjustment methods. Simulation and experimental results show that the reference signal of encoder can be calibrated exactly and quickly, and the rotor position is acquired accurately through the proposed method. Besides, the proposed method is suitable for PMSM whether the motor is loaded or not.