无位置传感器开关磁阻电机的简单控制方法

The Simple Method to Control Position Sensorless Switched Reluctance Motor

提出一种无位置传感器开关磁阻电机的简单控制方法,该方法是基于励磁相电感的变化。激励相的相电感跟随转子位置有规律的变化,当定子凸极和转子凸极接近对齐时,相电感逐渐增大,当定子凸极和转子凸极对齐时,相电感达到最大值,随后逐渐减少。因此,当相电感小于等于零时,通过改变激励相来控制开关磁阻电机,这种控制方法无需位置传感器。通过理论分析、仿真实验论证了该方案的可行性。

This paper presents a simple method to control position sensorless switched reluctance motor. This method is based on the variation of an excitation phase inductance. The phase inductance regularly varies with the rotor position and gradually increases as the rotor and stator salient poles are approaching alignment. When the salient poles of rotor and stator are aligned, the phase inductance has a maximum value, and thereafter it decreases gradually, so the switched reluctance motor can be controlled without the position sensor by changing the excitation phase when the phase inductance is zero or less than zero. Theory analysis and simulation test verify that this scheme is feasible.