The energy reclaiming scheme of composite power by using the super capacitor as energy storage element to realize the regenerative braking of electric vehicles was put forward. A kind of regenerative braking controller of electric vehicle based on digital PID control technology and megal6 microcontroller of ATMEL corporation was designed. The principle of regenerative braking as well as main circuit of controller, signal acquisition, and each work module written with C language were introduced. The test result indicates that the regenerative braking controller based on PID theory has a very good adjustment of PWM of duty cycle when charge and discharge current changing with voltage, and energy recovery system is confirmed to be able to recycle the electric automobile regenerative braking energy well.%提出了利用超级电容作为制动能量回收储能容器的复合电源方案,并针对ATMEL公司mega16单片机,应用数字PID控制算法,设计了一种可应用于纯电动汽车的制动能量回收控制器模块.介绍了再生制动的原理及其控制器主电路与信号采集电路,以及用C语言编写的各工作模块.试验调试结果表明,充、放电电流随电压变化时,数字PID控制策略能很好地调节PWM占空比的合理变化,并验证了此制动能量回收系统可以有效地回收电动汽车再生制动能量.
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