高速无刷直流电机无滤波延迟换相控制方法  

Research on Commutation Control Method Based on a Non-delay Filter for High-speed BLDCM

作　　者：姚元鑫 刘兴林 陈哲[2] 焦宁飞[2] 谭博 YAO Yuanxin;LIU Xinglin;CHEN Zhe;JIAO Ningfei;TAN Bo(AVIC Guiyang Aviation Motor Co. ,Ltd. , Guiyang 550009, China;Shaanxi Key Laboratory of Small & Special Electrical Machine and Drive Technology, School of Automation, Northwestern Polytechnical University, Xi’an 710129, China;Electronic Information Engineering, Xi’an Technological University, Xi’an 710021, China)

机构地区：[1]航空工业贵阳航空电机有限公司,贵阳550009 [2]陕西省微特电机及驱动技术重点实验室,西北工业大学自动化学院,西安710072 [3]西安工业大学电信学院,西安710021

出　　处：《微电机》2020年第2期67-70,79,共5页Micromotors

摘　　要：高速无刷直流电机通常采用基于反电势过零点检测的无位置控制方法,由于反电势的过零点会受到相电流续流过程的干扰,而传统的滤波方法会引起电机的换相延迟,导致电机效率降低。针对该问题,论文提出一种无滤波延迟的换相方法。该方法基于干扰信号的特征,设计一个延迟时间可控的窗口滤波器,经过该窗口滤波器获取清晰的反电势过零点信号。该窗口滤波器的延迟时间为设定值,可以对零点信号进行精确补偿,从而得到电机的理想换相点。最后,搭建了基于FPGA和DSP的实验平台对所提出的方法进行了验证。High-speed brushless DC motors(HBLDCM)usually adopt sensorless control method based on back-EMF zero-crossing detection.However,the zero-crossing point of back EMF is disturbed by the freewheeling process of phase current,and traditional filtering methods will cause the commutation delay,which results in reduced motor efficiency.Aiming at this problem,a commutation control method based on a non-delay filter was proposed for HBLDCM in the paper.In this method,a window filter with controllable delay time was designed based on the characteristics of the interference signal,and clear back-EMF zero-crossing signal can be obtained through the window filter.Since the delay time of the window filter is controllable,the delay time can be accurately compensated to obtain the ideal commutation point of the motor.Finally,an FPGA and DSP-based experimental platform was built to verify the proposed method.

关 键 词：无刷直流电机 反电势过零点 无延迟滤波 

分 类 号：TM36+1[电气工程—电机] TP273[自动化与计算机技术—检测技术与自动化装置]