As motor is braking, two-leg buck dc-dc power converter is applied to retrieve the energy to charge the battery through the electromotive force of motor.

• 永磁同步电动机煞车能量回收方面采用两臂分相式降压型功率转换器，将永磁同步电动机之感应电动势转换为稳定直流电压，将能量回充蓄电池及具有辅助煞车的效果。