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DRV8312使用PM驱动直流无刷的问题

Other Parts Discussed in Thread: CONTROLSUITE

我利用DRV8312-C2-KIT中的PM_SENSORLESS例程修改,对另一个电机进行驱动。在低速下,监测C2-KIT板子上的I_FB测点,还是正弦波;但高

 
速下,正弦波就开始走形了,振幅和周期都不对称了。除了在PM_Sensorless-Settings.h里修改电机参数,还需要修改哪些参数呢?  
 
有人看过controlsuit 里的 motor control ------ math block 了吗?