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下桥臂双电阻采样电流电机转不起来



我用下桥臂双电阻采样电流电机转不起来,而用电流传感器采样回来的电流控制PMSM就没问题。有没有做过的人,请教下双电阻采样电流注意一些什么事项?我还发现了一个怪现象:按照理论讲电流采样时刻应该在向量(0,0,0)的时候,即下溢中断触发采样,但这种方式根本转不起来;反而改成上溢中断触发采样,反而电机能转起来,但转动异常。