半桥型充电机抑制输出电流畸变控制策略  

Control Strategy to Restrain Output Current Distortion of Half Bridge Charger

作　　者：梅建伟[1] 田艳芳[1] 罗敏[1] 刘杰[1] 魏海波[1] MEI Jian-wei;TIAN Yan-fang;LUO Min;LIU Jie;WEI Hai-bo(College of Electrical and Information Engineering/Hubei University of Automotive Technology,Shiyan 442002,China)

机构地区：[1]湖北汽车工业学院电气与信息工程学院,湖北十堰442002

出　　处：《山东农业大学学报（自然科学版）》2018年第1期129-134,共6页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：无刷双馈电机参数辨识与解耦控制关键基础问题研究(D20171802)

摘　　要：本文研制的纯电动汽车用充电机,采用单相半桥逆变电路作为主回路,针对半桥逆变器电容中点电压偏移,引起输出电流畸变的问题,从理论上分析电容中点电压偏移量与频率、负载轻重、电容大小以及桥臂开关管导通时间之间的关系,提出了一种基于占空比和频率分段调节的抑制电流畸变控制策略。样机试验结果表明,该控制策略有效地减小电容中点电压偏移,抑制了输出电流的畸变。The charger for electric vehicles adopts single-phase half bridge inverter circuit as main loop.Output current is distorted due to capacitance midpoint voltage half bridge inverter deviation,the relationship is analyzed theoretically among capacitance midpoint voltage offset and frequency,load weight,the size of the capacitor,and the bridge arm switch tube conduction time,the control strategy to restrain current distortion is proposed based on duty ratio and frequency subsection adjustment.The test results of the prototype show that the control strategy can effectively reduce capacitance midpoint voltage offset and restraining the distortion of the output current.

关 键 词：充电机 畸变电流 电动汽车 

分 类 号：TM910.6[电气工程—电力电子与电力传动]