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永磁同步电机定子电流频率问题



给位大神好,小弟刚开始学习28335,请问在进行永磁同步电机控制时,转子的转速与永磁机定子电流频率是同步关系,而定子电流是由逆变器通过PWM控制输出的,那我们得到的电流频率是否就等于PWM开关频率呢,但PWM的周期又是固定的,这是否相矛盾呢,还望各位告知