使用重叠换相的无刷直流电动机直接转矩控制  

Direct Torque Control System of Brushless DC Motor Using Overlap Commutation Strategy

作　　者：唐慧雨 张兰红[2] 何坚强 

机构地区：[1]江苏大学,镇江212013 [2]盐城工学院,盐城224051

出　　处：《微特电机》2017年第1期49-54,共6页Small & Special Electrical Machines

基　　金：江苏省"六大人才高峰"第十一批高层次人才选拔培养资助项目(XNYQC-004);江苏省政策引导类计划(产学研合作)--前瞻性联合研究项目(BY2015057-14)

摘　　要：在分析无刷直流电动机直接转矩控制原理的基础上,研究了无刷直流电动机换相转矩脉动的产生原因,指出转矩脉动主要由关断相电流和开通相电流变化速率不一致引起,提出了采用使关断相延迟关断的重叠换相直接转矩控制方案来减小换相转矩脉动,建立了考虑重叠换相的直接转矩控制电压矢量选择表。实验结果表明所提重叠换相DTC方案能够有效较小换相转矩脉动,实现简单,可使无刷直流电动机获得优良的运行性能。According to the analysis of the principle of direct torque control（ DTC） of Brushless DC motor（ BLDCM）,the reason of commutation torque ripple in BLDCM was studied. It was pointed out that the torque ripple is mainly caused by the different current change rate of the turn-off phase and the opening phase. In order to reduce the commutation torque ripple,it was proposed by using the overlapping commutation DTC scheme which makes the turn-off phase delay to turn off. The DTC voltage vector selection table which considers overlapping commutation was established. Experimental results show that overlapping commutation DTC scheme can effectively decrease the torque ripple when the phases are changed.The scheme is simple and easy to implement and can make BLDCM to obtain excellent operating performance.

关 键 词：无刷直流电动机 直接转矩控制 转矩脉动 重叠换相 

分 类 号：TM33[电气工程—电机]