低转矩脉动同步磁阻电机设计与优化

Design and Optimization of Synchronous Reluctance Motor with Low Torque Ripple

同步磁阻电机利用其直、交轴磁路磁阻不同而产生磁阻转矩,转子结构简单且避免了稀土永磁材料的使用,电机的加工和制造成本明显降低,但是存在转矩脉动大、功率因数低及效率有待提升的不足。为此,重点开展降低同步磁阻电机转矩脉动且提高其功率因数和效率的电机设计及多目标优化设计研究。首先利用转子不对称结构降低电机的转矩脉动并完成低转矩脉动同步磁阻电机设计,然后基于田口实验法确定电机优化变量,再基于遗传算法兼顾实现转矩脉动、功率因数和效率的多目标优化且通过电机的有限元分析(FEA)验证低转矩脉动同步磁阻电机设计和多目标优化设计方案的合理有效性。

Synchronous reluctance motor（ SRM） avoids the use of rare earth permanent magnet materials and its reluctance torque is produced by the different reluctance between the direct axis and quadrature-axis magnetic circuit,the machining and manufacturing costs of SRM decreased significantly. However,SRM is also faced with the deficiency of high torque ripple and low power factor,furthermore,its efficiency needs to be improved. Therefore,the design and multi objective optimization of SRM were mainly researched to reduce torque ripple,improve power factor and efficiency. At first,an asymmetric rotor structure was used to design SRM with low torque ripple,then the optimization variables of SRM was determined by Taguchi method,and then,the genetic algorithm was used to implement the multi objective optimization of SRM including torque ripple,power factor and efficiency. Finally,The scheme＇s effectiveness of SRM design and its multi objective optimization were verified by FEA.