无位置传感器无刷直流电机换相位置的检测与修正  

Detection and Correction of Commutation Position for Sensorless BLDCM

作　　者：张兰红[1] 杨婷婷 王韧纲 何坚强 ZHANG Lanhong;YANG Tingting;WANG Rengang;HE Jianqiang(School of Electrical Engineering, Yancheng Institute of Technology, Yancheng Jiangsu 224051, China;School of Electronic and Information Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China;Jiangsu Youhe Power Machinery Limited Company, Yancheng Jiangsu 224031, China)

机构地区：[1]盐城工学院电气工程学院,江苏盐城224051 [2]江苏大学电气信息工程学院,江苏镇江212013 [3]江苏友和动力机械有限公司,江苏盐城224031

出　　处：《微电机》2019年第10期60-65,97,共7页Micromotors

基　　金：江苏省政策引导类计划(国际科技合作)—重点国别产业技术研发合作项目(BZ2018045);盐城工学院研究生创新工程项目(SJCX17_YG03)

摘　　要：分析了无位置传感器无刷直流电机根据端电压进行反电势过零点检测进而获得转子换相位置的原理,研究了 PWM调制对反电势过零点检测的影响,设计了消除 PWM斩波干扰的反电势过零点检测电路,提出了对阻容滤波、器件延时与软件计算导致的相位偏移进行联合修正的方法,推导了相移修正公式。实验结果表明所设计的反电势过零检测电路和相移修正方法可准确获得转子换相位置,无位置传感器无刷直流电机能够稳定可靠地运行。The principle of zero-crossing detection of back EMF based on terminal voltage for sensorless brushless DC motor (BLDCM) was analyzed, and the commutation position of rotor was obtained accordingly. The influence of PWM modulation on zero- crossing detection of back EMF was studied. A zero-crossing detection circuit of back EMF was designed to eliminate PWM chopper interference. A combined correction method of phase shift caused by resistance-capacitance filter, device delay and software computing was proposed. The phase shift correction formula was deduced. Experimental results show that the commutation position of motor rotor can be accurately obtained by the zero-crossing detection circuit of back EMF and phase-shift correction method. Brushless DC motor can operate stably and reliably.

关 键 词：无刷直流电机 无位置传感器 换相位置 检测 修正 

分 类 号：TM301[电气工程—电机] TM361