摘要
针对无刷直流电动机传统反电势检测存在受PWM调制策略、开关管和二极管导通压降影响的问题,提出一种通过检测无刷直流电动机线电压差的过零点来检测反电动势过零点的通用方法。理论分析和实验结果证明,提出的方法是正确有效的。
In view of the traditional back-EMF detection by the existence effects of PWM modulation strategy,MOSFETs and diodes pressure drop.A general method to detect the rotor positin for brushless DC motor by detecting the crossing-zero of the line voltage difference was presented in this paper.Theoretical analysis and experimental results prove that the method proposed is correct and effective.
出处
《微特电机》
北大核心
2009年第10期11-13,共3页
Small & Special Electrical Machines
关键词
无刷直流电动机
线电压差
反电势
过零点
检测
brushless DC motor
line voltage difference
back EMF
zero crossing
detection
