一种半/全桥PWM切换策略电动车能量回馈法  

Half/full bridge of PWM switching control method for energy regeneration of electric vehicles

作　　者：成立[1] 奚家健[1] 李宁[1] 严鸣[1] 王振宇[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2013年第3期304-308,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏高校优势学科建设工程项目(苏政办发〔2011〕6号)

摘　　要：为了增大电动车制动模式下铅酸蓄电池充电接受率(充受率),提出了一种基于半/全桥PWM切换策略的能量回馈方法.借助无刷直流电机(BLDCM)整流电路,通过判断制动信号来切换半/全桥PWM波形,以实现正常行驶和回馈能量两种工作模式.当处于回馈能量模式时利用全桥PWM序列脉冲,控制对蓄电池瞬时快充并间歇放电,以较多地回收能量,获取较佳的储能效果.将所提出的PWM切换策略能量回馈法与Boost升压电路回馈法作了试验比较,分析了回馈模式的电流波形,并对比了两种方法回馈能量的效果.结果表明:在相同的行驶条件下,采用所提出能量回馈法的电动车,其蓄电池平均内阻比Boost回馈法降低了216 mΩ,同时增大了蓄电池充受率约6.2%,且延长了行驶里程约6.6%.In order to obtain high charge current acceptance in energy regeneration for battery during e- lectric brake of light electric vehicle （EV） , a half/full bridge of PWM switching control method was pro- posed. Based on a BLDCM PWM converter circuit, the switched special PWM control was realized by braking signal during normal and energy-regeneration modes. The quick periodical swift charge and re- charge for battery can be realized with high efficiency, and more energy can be returned in the energy regeneration period. The performance of the proposed method was compared with the Boost converter energy regeneration method through experiments. The results show that compared with the Boost converter energy regeneration method, the control method can decrease the average resistance of battery by 216 mΩ, and increase the average charge current acceptance by 6.2% with enhanced driving range of 6.6% for EV under the same driving condition.

关 键 词：轻型电动车 铅酸蓄电池 充电接受率 能量回馈 模式切换 脉冲间歇充电 

分 类 号：U469.72[机械工程—车辆工程] TP202[交通运输工程—载运工具运用工程]