Comparative Study of Linear Variable Flux Reluctance Machine with Linear Wound Field Flux Reversal Machine  

作　　者：Tingting Jiang Liang Xu Jinghua Ji Wenxiang Zhao 

机构地区：[1]the School of Electrical and Information Engineering,the Jiangsu Key Laboratory of Drive and Intelligent Control for Electric Vehicle,and the National Center for International Research on Structural,Health Management of Critical Components,Jiangsu University,Zhenjiang 212013,China [2]IEEE

出　　处：《CES Transactions on Electrical Machines and Systems》2023年第1期73-80,共8页中国电工技术学会电机与系统学报（英文）

基　　金：supported in part by the National Natural Science Foundation of China under Grant 51977099 and Grant 52177044;in part by the Hong Kong Scholars Program under Grant XJ2019031;in part by the China Postdoctoral Science Foundation under Grant 2019T120395;in part by the Natural Science Foundation of Jiangsu Higher Education Institutions under Grant 21KJA470004;in part by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘　　要：As members of doubly salient magnetless linear machines,linear variable flux reluctance(LVFR)and wound field flux reversal(LWFFR)machines inherit the merits of conventional magnetless linear machines such as low cost,high flux adjustment capability and high reliability.Furthermore,like linear switched reluctance machine,they have a very simple and compact long secondary,which are very attractive for long stroke applications.However,low force capability is their major defect.To solve this issue,new LVFR and LWFFR machine topologies were proposed in recent work,while lacking studies on their force improvement mechanism and further force evaluation.In this paper,LVFR and LWFFR machines with improved force performance are comparatively studied with the emphasis on their force capabilities.The operation principle of the two machines is analyzed based on magnetic field harmonics produced by flux modulation.Contributions of air-gap flux density harmonic components to no-load back electromagnetic forces of the two machines are analyzed and the average force equation is derived.Moreover,force capabilities of the both machines are investigated by means of the time-stepping finite-element analysis to verify the theoretical analysis.

关 键 词：Wound field Variable flux reluctance Flux reversal Linear machine Finite-element analysis 

分 类 号：TM359.4[电气工程—电机]