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PMSM缺一相软件检测

Other Parts Discussed in Thread: DRV8301

drv8301 revd  FOC驱动BLDCM。

去掉任意一相电机线,电机在任意速度可以正常启动,电机电流和转速未见任何异常情况。转速可以闭环。那应该怎么用软件判断电机是否缺相?(这里的电机运行均指空载运行,我要判断电机缺相与否要在空载运行时才有意义)