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针对永磁同步电机调速系统中速度传感器存在安装缺陷及在某些特定的参数下电机会呈现混沌特性,提出了无速度传感器永磁同步电机滑模控制混沌抑制方法.在无速度传感器运行的永磁同步电机矢量控制调速系统基本框架下,采用非奇异快速终端滑模控制方法来抑制电机的混沌运动.首先在永磁同步电机的混沌模型基础上通过仿真验证了混沌现象的存在;然后利用扩张状态观测器(ESO)估计转速,构成无速度传感器永磁同步电机矢量控制系统;在此基础上设计了非奇异快速终端滑模控制器,当电机在某些参数条件下呈现混沌现象,即刻通过控制器的切入来抑制永磁同步电机的混沌运动.最后通过仿真验证该方法的有效性,保证电机运行稳定和可靠.
Aiming at the defects of the speed sensor in the permanent magnet synchronous motor speed control system and the chaos characteristic of the motor under some special parameters, a chaos suppression method of the sliding mode control of the speed sensorless permanent magnet synchronous motor is proposed. Under the basic framework of PMSM vector control and speed control system, the non-singular and fast terminal sliding mode control method is used to suppress the chaos of the motor.Firstly, the chaos of the permanent magnet synchronous motor Based on this, a non-singular and fast terminal sliding mode controller is designed. When the motor presents chaos phenomenon under some parameters, The chaos of permanent magnet synchronous motor is restrained by the cut-in of the controller.Finally, the effectiveness of this method is verified by simulation to ensure the motor running steadily and reliably.