关键词: 永磁同步直线电机, 无传感器控制, 高频脉动电流注入法, 增广扩展卡尔曼滤波器

Abstract:

The speed and position estimation accuracy of sensorless control system for permanent magnet linear synchronous motor is easily affected by end effect and motor parameters at low speed domain. The high frequency pulse current injection method was used to extract the error term of the position signal. The motor speed and position estimations were obtained by augmented extended Kalman filter (AEKF) filtering the error, meanwhile identifying the motor parameters which can effectively weaken the influence of end effect and reduce the estimation error.The simulation results verify the advantages and feasibility of the proposed method.

Key words: permanent magnet synchronous linear motor (PMSLM), sensorless control, high frequency pulse current injection method, augmented extended Kalman filter (AEKF)