低速大转矩模块化容错永磁电机不同转子结构分析

Analysis of Different Rotor Structures of Low-speed and High-torque Modular Fault-tolerant Permanent Magnet Motors

模块化容错电机相比于其他结构的容错电机其控制方式简单、容错力强,得到了广泛的应用。电机的容错能力除了改变定子结构外,不同的转子结构其容错能力亦有较大的差异。本文基于描述的一种不等跨距绕组定子模块化容错永磁电机,分析了三种不同的转子结构,对电机运行性能的影响。基于转子结构数学模型与遗传算法对三种转子进行优化设计。在定子参数完全相同的前提下,从齿槽转矩、矩角特性、退磁、运行性能等方面进行了对比分析。最后制作了定子3×3模块化样机进行实验。通过对比分析测试数据与有限元结果,证明了本文分析的合理性。

Compared with other structural fault-tolerant motors,modular fault-tolerant motors have been widely used because of their simple control methods and strong fault tolerance.In addition to changing the stator structure,the fault tolerance of motors varies greatly among different rotor structures.Based on the description of a modular combined stator fault-tolerant permanent magnet motor(MCS-FTPMSM)with unequal span winding,the influence of three different rotor structures on the performance of the motor was analyzed in this paper.Three kinds of rotors were optimized based on rotor structure mathematical model and genetic algorithm.Under the premise of the same stator parameters,comparative analysis was carried out from the aspects of the cogging torque,torque-angle characteristics,demagnetization,operation performance.Finally,a 3×3 modularized prototype of the stator was made for the experiment.By comparing and analyzing the test data with the finite element results,the rationality of the analysis in this paper was proved.