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在28062DSP采用TI SMO例程进行无位置传感器控制，但是电流检测在三相输出端，而且光耦驱动为低电平有效，需要在程序里修改哪些？目前采用下桥臂电流采样是在三相下桥臂全开通时刻，那在三相输出端采用应选择哪个时刻？
