方波无刷直流电动机不导通相电流分析  

Analysis on Non-conduction Phase Current of Square-wave Brushless DC Motor

作　　者：姚德新[1] 刘卫国[1] 谭博[1] 孙银川[1] 

机构地区：[1]西北工业大学自动化学院,西安710072

出　　处：《微电机》2009年第7期33-35,64,共4页Micromotors

摘　　要：方波无刷直流电动机控制通常采用两相导通、三相六状态PWM方式运行,任意时刻只有两相绕组导通,另一相绕组不导通。通常忽略不导通相的电流。研究表明,不导通相的电流明显存在,而且有规律且对电机性能会产生影响。结合上下桥臂轮流斩波PWM调制方式,从理论上分析了不导通相电流产生的原因,并进行了实验研究,表明不导通相电流的大小与不导通相的反电势大小有关。Square-wave brushless DC motor （BLDCM） is usually used with the mode of 3-phase 6-state PWM. At any moment, only two of the phases work and the other phase shutdowns. The non-conduction phase current is usually neglected. This paper put forward the view that non-conduction phase current which formulaically and markedly exists had the influence to the BLDCM performance. Theoretically analyzed the cause of the non-conduction phase current with the PWM method of upper and lower bridge arm chopping by turns, and made some experiments to verify its validity.

关 键 词：无刷直流电动机 不导通相电流 PWM 实验 

分 类 号：TM33[电气工程—电机] TM933.1