无刷直流电机全电子再生制动能量回收系统的设计

Design of full electronic regenerative braking energy system for BLDC motor

针对电机制动时输出电压逐渐降低而导致的能量回收困难等问题,提出一种基于全电子再生制动能量回收控制策略。以ARM公司的STM32单片机为控制器,采用以增量式PID控制算法为核心的软件设计,构建了电机制动和驱动的整套方案。采用由推挽-变压器电路和电压负反馈电路组成的升压电路进行升压控制,利用电子切换开关控制系统的驱动和制动模式转换。实验结果表明,电机制动时输出的电压经升压电路后能够始终满足储能装置充电电压的要求,使用PID控制算法能很好地调节驱动时电机转速。

Aiming at the difficult of recycling energy due to the output voltage gradually reduced in motor braking,a control strategy of regenerative braking energy was proposed based on full electronic control.A set of schemes of motor braking and driving based on software design of incremental PID control technology and hardware controller taking STM32 microcontroller of ARM corporation was constructed.A boost circuit composed of push-pull transformer circuit and negative voltage feedback circuit was adopted for boost control,and the driving and braking mode conversion of the system was controlled by electronic switch.The experimental result show that the output voltage of motor braking could always meet the requirements of charging voltage of storage and supply device after the boost circuit,at PID control algorithm effecitively adjust the speed of motor driving,and the PID control algorithm can adivst effecitively the motor speed during driving.