混合动力中无刷直流电机反接制动PWM调制方式的研究  

Study on PWM Strategy for Braking of Brushless DC Motor in Hybrid Electric Vehicle

作　　者：胡庆波[1] 郑继文 吕征宇[1] 

机构地区：[1]浙江大学电力电子国家专业实验室,浙江省杭州市310027 [2]浙江省广播电视大学计算机系,浙江省杭州市310012

出　　处：《中国电机工程学报》2007年第30期87-91,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50237030ZD)~~

摘　　要：对无刷直流电机中采用的反接制动方式进行了比较研究,将目前采用的5种PWM调制方法归为两类。同时,针对反接制动时电流无法控制的问题,该文指出反电动势短接回路的存在是造成再生电流无法控制的主要原因。从而提出采用双管调制的方法可以对制动电流进行有效的控制。另外,通过对不同PWM调制方法下换相转矩的分析,提出在换相时根据转速来相应调节占空比的方法可以抑制换相转矩脉动。实验结果表明,采用双管调制的反接制动可以有效的控制制动电流,并且具有很好的换相效果。The braking strategy of brushless DC motor have been researched in this paper, and the five PWM methods are classified into two kinds. In addition, the primary causation for the problem that phase current during reverse braking process out of control is a short loop by the back electromotive force. Double switching modulation scheme can control braking current effectively is proposed in the paper, and the commutation torque ripple is eliminated by adjusting duty cycle based on the motor speed. Experimental results indicate that braking current is controlled effectively used double switching modulation scheme, and commutation phase has good performance.

关 键 词：电动汽车 无刷直流电机 再生电流 PWM调制 

分 类 号：TM301.2[电气工程—电机]