永磁无刷直流电机无位置传感器技术研究

摘要

永磁无刷直流电动机具有结构简单 、效率高等优点,广泛应用于军工或其他领域,因此研究永磁无刷直流电动机具有重要的意义.首先介绍了永磁无刷直流电动机的工作原理,然后分析了无位置传感器永磁无刷直流电动机反电动势法原理,并设计了其无位置传感器控制系统.最后在Matlab/Simulink平台上搭建无位置传感器永磁无刷直流电动机双闭环PI控制系统的仿真模型,并给出了仿真结果.仿真结果表明该系统能够控制电动机正常启动,具有良好的动态和稳态性能.%Permanent magnet brushless DC motor (PMBLDCM ) has advantages of simple structure and high efficiency , and has wide application in military ,industrial and other areas ,so the study of PMBLDCM has the vital significance .The pa-per firstly introduces the working principle of PMBLDCM ,and then analyzes the principle of back EMF zero crossing of PM -BLDCM ,and designs the control system without position sensor .At last the paper builds the simulation models of double closed - loop PI control system for PMBLDCM without position sensor based on Matlab /Simulink platform ,and gives the simulation results .It is learned that the control system can control the motor starting normally and has good dynamic and static performance .