无刷直流电动机直接转矩控制零矢量分析研究  

Study on Zero Voltage Vector in Direct Torque Control of Brushless DC Motor

作　　者：杨建飞[1] 胡育文[2] 刘建[1] 邱鑫[1] 吴华仁[1] 钱伟行[1] 郭爱琴[1] 

机构地区：[1]南京师范大学,南京210042 [2]南京航空航天大学,南京210016

出　　处：《微特电机》2015年第10期5-8,11,共5页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51407095;61273243;61304227);江苏省自然科学基金项目(BK20151548);江苏省高校自然科学基金项目(13KJB590001)

摘　　要：无刷直流电动机直接转矩控制系统中定义开关管全关对应的电压矢量为零矢量。分析了全关条件下无刷直流电动机的电压电流变化规律,指出由于电感电流的连续性以及续流二极管的存在,全关条件下作用在电机上的电压矢量实际为对应导通条件下的反矢量,根据全关条件下电机电压电流的变化规律,提出了适用于两相导通无刷直流电动机直接转矩控制系统的新的零矢量。仿真结果验证了理论分析的正确性,以及引入新定义的零矢量对降低转矩脉动的有效性。In brushless DC motor direct torque control system,the voltage vector is defined as zero voltage vector while all power switches are off. The phase voltage and current were analyzed under traditional zero voltage vector,and the actual voltage vector was the corresponding negative vector because of the continuity of the stator inductance current and the anti-paralleldiode. New zero voltage vectors were proposed in this paper according to the phase voltage and current change law.The validity of the analysis and effectiveness of new zero voltage vectors in reducing torque ripple were verified by the simulation results.

关 键 词：无刷直流电动机 直接转矩控制 零电压矢量 

分 类 号：TM33[电气工程—电机]