矿用电机车永磁同步电动机无位置传感器低速稳定控制

摘要

为改善矿用电机车内置式永磁同步电动机无位置传感器低速控制的稳定性,提出了一种改进脉动高频电压注入法.该方法将高频正弦电压信号注入到估计的同步旋转坐标系直轴上,利用低通滤波器对交轴高频电流进行处理,获得含有转子位置角估算误差的信号,再将该信号输入龙伯格观测器,获取估算的转子位置信息.仿真和实验结果表明,该方法在低速段能准确估算转子位置角和转速,使电机车在低速段能平稳启动、运行和停车.%In order to improve stability of sensorless control for interior permanent magnet synchronous motor of mine-used electric locomotive at low speed stage,an improved pulsating high-frequency voltage injection method was proposed.High-frequency sinusoidal voltage signal is injected into direct axis of estimated synchronous rotating coordinate,and high-frequency current of quadrature axis is processed through low pass filter,so as to obtain signal containing estimation error of rotor position angle.The signal is input into Luenberger observer to calculate estimated rotor position.The simulation and experimental results show that the method can estimate rotor position angle and speed accurately at low speed stage,so that electric locomotive can realize smooth starting,operation and stopping at low speed stage.