无传感器永磁同步电机控制策略研究

Research on the control strategy of the sensorless permanent magnet synchronous motor

永磁同步电机由于其结构简单、功率密度高等特点广泛应用于航空航天和新能源等新兴领域,其控制系统的开发也具有重要的意义。根据永磁同步电机的数学模型,设计出控制策略为矢量控制,SVPWM为调制方式,无位置控制方法(采用滑模观测器)的双闭环控制系统。通过Simulink仿真,比较了五段式和七段式SVPWM在控制效果上的区别,并为得到准确的转子位置估计值提供了参数选取方法。采取了提高系统精度和程序运算速度的措施,对滑模观测器相关参数进行了选择,并完成整体实验。实验结果表明,该系统能够实现基于SVPWM的永磁同步电机的无传感器控制。

Permanent magnet synchronous motor（ PMSM） due to its simple structure,high power density are widely used in many emerging areas such as aerospace and new energy. So the development of the control system also has important significance. According to the mathematical model of the high-speed PMSM,the double closed loop control system whose control strategy is vector control,modulation mode bases on SVPWM,position control method is sliding mode observer（ SMO）,is designed. By Simulink simulation,the five sections and seven sections of SVPWM are compared on the difference of the control effect,and the parameter selection method to get accurate rotor position estimation is provided.The measures to improve the system accuracy and the speed of process operation are took in experiment,the related parameters of the sliding mode observer is choose,and then the whole experiment completed.Experimental results show that the system can realize the sensorless control based on SVPWM of PMSM.