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发一个固定占空比的脉冲给永磁同步电机，它可以转吗？
如果是FOC控制，发固定占空比是不行的。
电机foc运行时，PWM 每像占空比都是实时改变的。针对不同扇区，扇区的不同位置。都是通过实时调节，使电机磁链逼近于圆形。
