开关磁阻电机绕组气隙建模及最佳气隙宽度确定方法

针对开关磁阻电机定子槽内双绕组间因存在不规则气隙而导致其温度场分析建模困难的问题,提出一种双绕组气隙的改进建模方法。分析了电机双绕组间气隙总截面积的计算方法,研究了双绕组气隙的模型结构与最佳气隙宽度的确定方法,在此基础上建立了开关磁阻电机的三维有限元模型,并采用有限元法对其温度场进行了分析,得到开关磁阻电机的温度场分布,通过对不同气隙宽度下的温度场分析并采用数值拟合方法得到其气隙宽度与相应温度间的函数关系,利用该函数关系及相应的实测温度值,即可得到双绕组气隙模型的最佳气隙宽度,该方法因有效提高了开关磁阻电机温度场分析结果的准确性,因而具有较好的应用价值。

Air gap modeling of SRM winding and determination of optimal air gap width

Aiming at the problem that the temperature field analysis modeling is difficult due to the irregular air gap between the two windings in the stator slot of the switched reluctance motor, an improved modeling method for the double winding air gap is proposed. The calculation method of the total cross-sectional area of the air gap between the two windings of the motor is analyzed. The model structure of the double-winding air gap and the method for determining the optimal air gap width are studied. Based on this, a threedimensional finite element model of the switched reluctance motor is established. The temperature field is analyzed by finite element method, and the temperature field distribution of the switched reluctance motor is obtained. The temperature field under different air gap width is analyzed and the numerical fitting method is used to obtain the air gap width and the corresponding temperature. The function relationship, using the function relationship and the corresponding measured temperature value, can obtain the optimal air gap width of the double-winding air gap model. This method effectively improves the accuracy of the temperature field analysis results of the switched reluctance motor, it has a good application value.