一种新颖的无刷直流电机位置检测方法

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摘要为了实现无刷直流电机无位置传感器控制,提出了一种新颖的基于假中性点基波电压的检测方法。该方法比较电机断开相绕组端电压和假中性点电压的关系,通过得到两者交点直接获得转子位置信息。在H_PWM_L_ON和L_PWM_H_ON两种半桥调制方式下,无论电机处于PWM_ON还是PWM_OFF的时刻,该方法无需改变比较对象,具有普遍适用性。理论推导证明了该方法的正确性,实验给出了该方法在不同占空比下的控制结果,验证了这种方法的有效性。

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	王大方
	祝雅琦
	金毅
	刘智祺

关键词 ：无刷直流电机, 无传感器控制, 基波, PWM

Abstract：A novel phase detection method based on fundamental wave of the virtual neutral point was presented for the sensorless control system of Brushless DC(BLDC) motors. Rotor space—position information can be directly obtained by detecting the voltage difference between the open phase terminal and the virtual neutral point. In two half bridge modulation methods of H_PWM_L_ON and L_PWM_H_ON, both during PWM_ON and PWM_OFF periods, the comparing objects need not to be changed. The theoretical analysis proves the correctness of the method, and the control results are given under different duty cycles in the experiments, which confirms the validity of the proposed method.

Key words： Brushless DC motor sensorless control fundamental wave PWM

收稿日期: 2011-10-20 出版日期: 2013-11-28

PACS:

TM301

基金资助:威海市科技发展计划(2009-3-93)资助项目。

作者简介: 王大方男，1978 年生，博士，副教授，硕士生导师，研究方向为新能源车辆与电驱动技术。祝雅琦女，1989 年生，硕士研究生，研究方向为电机伺服控制技术、无位置传感器控制技术。

引用本文:

王大方, 祝雅琦, 金毅, 刘智祺. 一种新颖的无刷直流电机位置检测方法[J]. 电工技术学报, 2013, 28(2): 139-144. Wang Dafang, Zhu Yaqi, Jin Yi, Liu Zhiqi. A Novel Research on Detecting Position of Brushless DC Motors. Transactions of China Electrotechnical Society, 2013, 28(2): 139-144.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I2/139

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