【摘要】 为研究PWM调制方案对无刷直流电机电动汽车再生ABS的影响,在分析单、双管PWM调制方案下的无刷直流电机再生制动原理基础上,通过调节占空比的方法来防止再生制动时驱动轮抱死。建立了单轮车辆再生制动动力学模型,设计了再生ABS双闭环控制系统,外环控制滑移率,内环控制制动电流。以系统在结冰路面上再生制动为例,对系统在单、双管PWM调制方案下的防抱死制动性能进行了仿真试验。结果表明:与单管调制相比,双管调制时系统的制动距离短,回收能量多。更多还原

【Abstract】 To study the effect of the PWM modulation scheme on the regenerative anti-lock braking system(RABS)of the EV driven by apermanent magnet brushless DC motor,based on the analysis of the principle of the regenerative braking of the brushless DC motor under a single and double switching PWM modulation scheme,respectively,a method to adjust the PWM duty cycle is proposed to prevent drive wheels from locking during regenerative braking.A regenerative braking dynamics model of a single wheel vehicle is established,and a double-loop control model of the RABS is designed.The outer loop controls the wheel slip ratio,and the inner loop controls motor braking current.As an example of the EV’s braking on ice-covered road,a simulation test is conducted for the RABS under a single and double switching PWM modulation scheme respectively.The result shows that the RABS has a shorter braking distance and more energy recovery under a double switching PWM modulation than a single.更多还原