基于非对称绕组函数法永磁同步电机偏心电感参数的研究

Research on Eccentric Inductance of Permanent Magnet Machine Based on Asymmetrical Winding Function Approach

针对永磁电机偏心电感计算问题,通过引入绕组谐波磁动势畸变系数,对传统基于基波磁动势绕组函数进行改进与推导,提出一种非对称绕组函数法计算分析永磁电机偏心电感的方法。该方法将气隙半径函数、磁隙逆函数、绕组匝函数与谐波磁动势畸变系数计及到永磁电机偏心电感计算中,推导出基于非对称绕组函数法永磁电机偏心电感计算的数学模型,得到偏心电感与偏心率和转子位置之间的变化规律,实现了对偏心电感更为准确的分析计算。通过有限元仿真与该方法计算结果对比,验证了基于非对称绕组函数法分析计算永磁电机偏心电感的准确性,为永磁电机偏心运行时电感参数的分析计算方法提供基础与参考。

In allusion to the calculation of eccentricity inductance of permanent magnet machine(PMM),the distortion coefficient of the winding harmonic magnetomotive force was introduced.The computation method of the eccentric operation inductance parameters of the PMM was deduced based on the asymmetric winding function approach(AWFA).The air-gap radius function,magnetic gap inversion and turn function were introduced into the computation of eccentric inductance parameters.The variation rule of the eccentric inductance parameters of the PMM with different eccentricity ratio and rotor position was concluded.Based on the calculation method of the eccentric operation inductance parameter of the PMM,a eccentric model of PMM was established with the use of the finite element analysis(FEA)tool to analyze the eccentric inductance parameters.The characteristic of the eccentric operation inductance was summarized.The eccentric inductance obtained from the FEA simulation model was compared with the result which is calculated based on the AWFA.The accuracy of the eccentric operation inductance parameter calculated by the AWFA is verified.Providing reference foundation for eccentric inductance parameters analysis for this kind machine.