基于EKF的永磁同步电机直接转矩控制研究

EKF-based Permanent Magnet Synchronous Motor Direct Torque Control Research

无速度传感器永磁同步电机控制中，鉴于直接计算法需要精确的数学模型、滑模观测器由于开关切换动作的不连续造成的抖振问题以及智能算法特别复杂的缺点，本文对利用扩展卡尔曼滤波器（extended Kalmanfilter，EKF）对永磁同步电机（permanent magnet synchronousmotor，PMSM）直接转矩控制（directtorque control，DTC）系统进行精确参数估计进而实现对无速度传感器永磁同步电机的控制的方法进行研究，并通过Matlab／Simulink仿真实验验证了扩展卡尔曼滤波算法的有效性。

The speed sensorless permanent magnet synchronous motor control,given the direct calculation method requires precise mathematical model,sliding mode observer as a continuous switching action does not cause the chattering problem and the shortcomings of intelligent algorithm is especially complex,this paper using the extended Kalman filter（extended Kalman filter, EKF）for permanent magnet synchronous motor（permanent magnet synchronous motor, PMSM） direct torque control（direct torque control,DTC）system so as to realize an accurate estimation of speed sensorless permanent magnet synchronous motor study of control methods,and by Matlab/Simulink simulation results verify the validity of the extended Kalman filter algorithm.