Study on Magnetic Shielding for Performance Improvement of Axial-Field Dual-Rotor Segmented Switched Reluctance Machine  

作　　者：Wei Sun Qiang Li Le Sun Xuefeng Jiang 

机构地区：[1]School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China

出　　处：《CES Transactions on Electrical Machines and Systems》2021年第1期50-61,共12页中国电工技术学会电机与系统学报（英文）

基　　金：the National Natural Science Foundation of China under Grant 51807094。

摘　　要：A category of permanent-magnet-shield(PM-shield)axial-field dual-rotor segmented switched reluctance machines(ADS-SRMs)are presented in this paper.These topologies are featured by using the magnetic material to shield the flux leakage in the stator and rotor parts.Besides,the deployed magnets weaken the magnetic saturation in the iron core,thus increasing the main flux.Hence,the torque-production capability can be increased effectively.All the PM-shield topologies are proposed and designed based on the magnetic equivalent circuit(MEC)model of ADS-SRM,which is the original design deploying no magnet.The features of all the PM-shield topologies are compared with the original design in terms of the magnetic field distributions,flux linkages,phase inductances,torque components,and followed by their motion-coupled analyses on the torque-production capabilities,copper losses,and efficiencies.Considering the cost reduction and the stable ferrite-magnet supply,an alternative proposal using the ferrite magnets is applied to the magnetic shielding.The magnet demagnetization analysis incorporated with the thermal behavior is performed for further verification of the motor performance.

关 键 词：Switched reluctance machine(SRM) magnetic shielding magnetic equivalent circuit(MEC) DEMAGNETIZATION thermal behavior. 

分 类 号：TM352[电气工程—电机]