基于端电压和改进SMO的无刷直流电机控制策略  

Control Strategy of Brushless DC Motor Based on Terminal Voltage and Improved SMO

作　　者：余莉[1,2] 沈喆磊 曹永娟[1,2] 廖带莲 YU Li;SHEN Zhe-lei;CAO Yong-juan;LIAO Dai-lian(School of Automation,Nanjing University of Information Science and Technology,Nanjing 210044,China;Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET),Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学自动化学院,南京210044 [2]南京信息工程大学江苏省大气环境与装备技术协同创新中心,南京210044

出　　处：《组合机床与自动化加工技术》2022年第8期99-104,共6页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金项目(51507082)。

摘　　要：针对无刷直流电机(BLDCM)无位置传感器控制技术中因相电感引起的换相续流导致存在换相干扰脉冲问题,为了提高控制系统的换相精度,通过检测非导通相端电压和母线电压来消除干扰。为了削弱传统滑模观测器(SMO)中固有的抖震,获得转子位置和速度,提出了一种改进型SMO。所提控制策略不需要低通滤波器,通过检测到的续流信号去除换相干扰成分,经过观测到的线反电动势与实际霍尔信号进行对比,实现精确换相。与传统的滑模观测器相对比,所提策略可以有效抑制脉动,准确估计转子位置。MATLAB仿真验证了该策略的可行性。Aiming at the problem of commutation interference pulse caused by commutation freewheeling caused by phase inductance in sensorless control technology of Brushless DC motor(BLDCM),in order to improve the commutation accuracy of control system,an interference is eliminated by detecting non conducting phase terminal voltage and bus voltage.In order to reduce the inherent chattering and obtain rotor position and speed in the traditional sliding mode observer(SMO),an improved SMO is proposed.The proposed control strategy does not need low-pass filter.The commutation interference component is removed by the detected freewheeling signal.The observed line back EMF is compared with the actual Hall signal to realize accurate commutation.Compared with the traditional sliding mode observer,the proposed strategy can effectively suppress the pulsation and accurately estimate the rotor position.The simulation results of MATLAB verifies the feasibility of the strategy.

关 键 词：无刷直流电机 无位置传感器 端电压 改进型SMO 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]