而电机控制的PWM 模式讨论似乎针对第二类的较多。因为PWM 控制对于遥控模型的

重要程度较高。而遥控玩具一般不调速，H 桥只是为了换向。工业控制由于减速后转速已很

低，不再迫切需要调速了，直接用通断控制已能满足大多数的要求。-And motor control of the PWM mode of the discussion seems more for the second category. PWM control as an important model for the remote control a higher degree. And remote control toys in general do not speed, H Bridge, only to change to. Industrial control has been due to very low speed after deceleration is no longer an urgent need to speed, the direct use of on-off control has been able to meet most requirements.