开关磁阻电机无位置传感器控制系统仿真

Simulation of the Sensorless Controller for Switched Reluctance Motors

该文提出了一种基于滑模变结构观测器的无位置传感器的开关磁阻电机控制仿真模型。滑模变结构观测器主要用于开关磁阻电机的转子位置和转速估计,这种控制模型仅需要测量磁阻电机的端电压和相电流,能在取代传统位置传感器后获得较好的观测效果。该文应用M atlab/S imu link仿真环境建立了开关磁阻电机的非线性模型,设计了控制律,并在三种不同的工作情况下对观测器结构进行了数字仿真。结果表明该方法能够很好地预测电机转子位置,同时在中高速情况下,观测精度可以达到比较满意的效果。

In this paper a simulation model of sensorless controller based on sliding - mode observer for switched reluctance motors is proposed. The sliding - mode observer only needs the measurement of phase voltage and current to estimate rotor position and speed, in addition it can achieve better estimations by replacing the traditional position sensors. This paper includes detailed simulation of nonlinear modal and observer for SRM in virtue of Matlab/Simulink toolbox under three different conditions. Simulation results show that this method can estimate the rotor position well, and achieve very high accuracy at a medium or high speed.