一种新型的无位置传感器无刷直流电机转子位置检测方法-电工技术学报.pdf

2009 年 4 月 电 工 技 术 学 报 Vol.24 No. 4 第 24 卷第 4 期 TRAN SACTION S OF CHINA ELECTROTECHNICAL SOCIETY Apr . 2009 一种新型的无位置传感器无刷直流电机转子位 置检测方法 邹继斌 江善林 张洪亮 （哈尔滨工业大学电气工程与自动化学院 哈尔滨 15000 1） 摘要 设计适应油井高温环境的无刷直流电动机驱动 统是一项重要的研究课题。本文介 绍了一种新型的无位置传感器无刷直流电机转子位置检测方法。设计了通过定子绕组的三相端 电压提取反电势的基波信号的新型电路，研究了一种与电机转速无关的固定相位滞后的开关电 容低通滤波器，在电机转速变化的情况下，相位滞后90° 电角度不变，得到无需相位补 的转 子位置信号，实现了无位置传感器无刷直流电机驱动 统的全硬件设计并成功地应用于油田测 井高温、高速无刷直流电机 统，实验证明该方法是简单可行的。 关键词：无刷直流电动机 无位置传感器 反电动势 开关电容滤波器 中图 类号：TM35 1 A Novel Method of Detecting for Rotor Position of a Sensorless Brushless DC Motor Zou J ibin J iang Shanlin Zhang H ong liang （Harbin Institute of Technology Harbin 15000 1 China ） Abstract It is a valuable research to design high temperature brushless DC (BLDCM) motor drive and control system for oil well detecting. In this paper, a new rotor position detecting method for the sensorless control of brushless DC motor is introduced. A novel circuit is designed to obtain fundamental harmonic from three-phase terminal voltage. A switched-capacitor filter which makes a fixed phase delay is researched. And the lag in phase is not related to the speed of the rotor . Since the phase is constant delay 90 electrical degree when the motor speed is changed, a rotor position signal which needn ’t phase compensation is obtained. It realizes a hardware-implemented sensorless BLDCM driver system and applies in well logging high temperature and speed BLDCM system successfully . The experimental results show that this method is simple and practical. Keywords ：BLDCM, sensorless, back-EMF, switched-capacitor filter 体粘贴在转子