基于参数敏感度的双凸极永磁型双定子电机的优化设计和性能分析

Parameter Sensitivity Optimization Design and Performance Analysis of Double-Salient Permanent-Magnet Double-Stator Machine

双凸极永磁型双定子(DSPMDS)电机是针对电动汽车(EVs)驱动电机的应用要求,融合了双定子电机理论和定子永磁型双凸极电机理论,具有高转矩密度、高功率密度以及更加灵活多变的工作模式等优点。针对该电机双层气隙、双定子的复杂结构,在DSPMDS电机初始设计尺寸的基础上,通过建立电机参数化模型,并采用多目标敏感度优化方法,筛选出对电机转矩波动和铁心损耗影响最大的关键结构尺寸参数,在此基础上进一步采用响应面法选取最优结构尺寸参数。采用有限元仿真计算分析DSPMDS电机的反电动势、铁心损耗、定位力矩等电磁性能,样机实验结果验证了所提出的参数敏感度优化设计方法和性能分析的正确性,丰富了该类复杂结构的永磁型电机的快速设计和优化的途径。

Combined with double stator motor theory and double salient permanent magnet motortheory,the double-salient permanent-magnet double-stator(DSPMDS)machine is suitable for electricvehicles(EVs).It has the advantages of high torque density,high power density and more flexibleworking modes.In view of the complex structure of the DSPMDS with two rotors and two air gaps,thispaper presents the optimal design of the DSPMDS to obtain a low torque ripple and high power density.The sizing equation is derived and the initial design dimensions are determined.The parametric modelof the machine is built up.By using optimization method of multi-objective sensitivity,the keystructure size parameters are screened that affect the torque ripple and core loss obviously.Then theoptimal structure size parameters are determined by further using response surface method.By meansof the finite-element method,the electromagnetic performance of the DSPMDS is investigated.Boththe results of finite-element analysis and experiments verified the design method and the theoreticalanalysis,which enrich the fast design and optimization way of the complex PM motor.