考虑磁路饱和的开关磁阻电机无位置传感器控制方法

Position sensorless control method for switched reluctance motorconsidering magnetic circuit saturation

开关磁阻电机在磁路饱和情况下,其导通相电感会随导通相电流的变化而变化,从而影响转子位置估算精度,提出一种电机转子位置估算方法。首先建立了相电感函数关系式;然后分析了相电流与相电感极值定位点位置角之间的关系;最后阐述了由两相邻采样定位点来估算出相应的转子位置角度的实现过程。以三相6/4结构电机进行了相关仿真与实验,结果表明上述方法的可行性。

The conduction phase inductance of switched reluctance motor will change with the change of the conduction phase current under the case of magnetic circuit saturation, resulting in a low rotor position estimation accuracy. Aiming at this problem, a position sensorless control method of switched reluctance motor considering magnetic circuit saturation is proposed. Firstly, the relationship formula of the phase inductance function is established, and then the relationship between the phase current and the position angle of the extreme positioning point of the phase inductance is analyzed. Finally, the realization process of estimating the corresponding rotor position angle from the two adjacent extreme positioning points is described. Finally, the related simulation and experiment were carried out with a three-phase 6/4 structure motor. The results show the feasibility of the above method.