本文分析了由蓄电池洪电的逆变器－水磁无刷直流电机系统在作电动汽车动力时实现电气制动的方法，着重研究了当电机转速低于电机空载额定转速时电磁制动及能量回馈的原理．提出了一种低速能量回馈制动的简便控制方法、计算机仿真和样机实验结果表明，采用本文听提出的控制方法，可方便地实现电动汽车的低速电气回馈制动 This paper analyzes the method of implementing electric braking when using AC-DC brushless DC motor system, which is a kind of inverter, which is driven by battery. The research focuses on the electromagnetic brake when the motor speed is lower than the no-load rated speed The principle of energy feedback. A simple control method of low-speed energy feedback braking is proposed. The computer simulation and prototype experimental results show that the low-speed electric feedback braking of electric vehicle can be easily achieved by adopting the control method proposed in this paper