一种内嵌式永磁同步电机启动策略

针对基于高频电压信号注入法的内嵌式永磁同步电机低速无位置传感器控制系统无法估计转子初始位置导致电机启动运行困难的问题,提出了一种内嵌式永磁同步电机启动策略。该策略通过向d,q轴注入高频脉振三角波电压信号,利用连续信号的解调思想傅里叶分解高频响应电流进行信号调制,获取角度误差信息,采用Luenberger观测器代替单PI调节器构成的锁相环估计转子角度;高频脉振三角波电压信号注入法存在无法进行永磁体N/S极判断问题,该策略采用两次转子预定位法简单有效地将转子定位于位置观测器可准确估计的位置,无需永磁体N/S极判断,控制过程简单易行。Matlab/Simulink仿真结果表明所提出的启动策略稳定有效。

A Starting Strategy of Interior Permanent Magnet Synchronous Motor

Aiming at the problem that the low-speed sensorless control system of interior permanent magnet synchronous motor(IPMSM)based on high-frequency voltage signal injection method cannot identify the initial position of the rotor,which causes the motor to start up difficultly,a starting strategy of IPMSM was proposed.In this strategy,the high frequency pulse triangular wave voltage signal was injected into d,q axis,and the high frequency response current was decomposed by Fourier transform to modulate the signal to obtain the angle error information,and the Luenberger observer was used to estimate the rotor angle instead of the phase-locked loop composed of a single PI regulator the rotor angle;the high-frequency pulsating triangle wave voltage signal injection method has the problem that the permanent magnet N/S pole cannot be identified,so this strategy used the twice rotor reservation method to simply and effectively locate the rotor to the position that can be accurately estimated by the position observer,without permanent magnet N/S pole judgment,the control process is simple and easy to operate.The Matlab/Simulink simulation results show that the proposed starting strategy is stable and effective.