电机与控制应用2026，Vol.53Issue(5)：523-535,13.DOI:10.12177/emca.2026.165
贯穿式FSCW定子轴向磁通双转子同步电机齿槽转矩分析
Cogging Torque Analysis of a Through-FSCW-Stator Axial-Flux Dual-Rotor Synchronous Generator
摘要
Abstract
[Objective]This paper addresses the cogging torque inherent in fractional-slot concentrated winding(FSCW)stator axial-flux dual-rotor synchronous generator,which can induce vibration and acoustic noise,degrade control accuracy and operational smoothness.The virtual displacement method is employed to analyze the underlying mechanism of cogging torque generation and to derive its approximate analytical expression,thereby providing a theoretical basis for generator design,manufacturing,and optimization.[Methods]First,the fundamental theory of FSCW was reviewed,and the structural characteristics and coupling principle of an electrically excited through-FSCW-stator axial-flux dual-rotor synchronous generator(AF-DR-TS-FSCW-SG)were introduced.Subsequently,the cogging torque generation mechanism of this class of generators was analyzed using the virtual displacement method,and an analytical expression for cogging torque was derived based on the magnetomotive force-permeance method,yielding an approximate mathematical model.In addition,a two-dimensional finite element modeling approach tailored for axial-flux dual-rotor synchronous machines was proposed,and its accuracy was validated through no-load electromagnetic characteristic experiments.Finally,the dominant subharmonic amplitudes of cogging torque obtained from the analytical model were compared with those derived from two-dimensional finite element simulations.[Results]The results indicated that the relative errors of the no-load back electromotive force(EMF)amplitude between the two-dimensional finite element analysis(2-D FEA)results and the experimental measurements under three operating conditions-namely,excitation of rotor 1 alone,excitation of rotor 2 alone,and simultaneous excitation of both rotors-were 4.02％,16.84％,and 10.73％,respectively.Despite the amplitude discrepancies,the waveform variation trends showed good agreement among all cases.Meanwhile,for the operating conditions with rotor 1 alone and rotor 2 alone excited,the relative errors of the dominant harmonic component of the cogging torque between the 2-D FEA results and the analytical results obtained by the virtual displacement method were 13.86％and 13.57％,respectively.[Conclusion]The proposed two-dimensional finite element modeling approach for the FSCW-stator axial-flux dual-rotor synchronous generator in this paper can accurately reflect the actual performance of the generator.In addition,the cogging torque mathematical model derived based on the virtual displacement method exhibits high accuracy.关键词
分数槽集中绕组/双转子同步电机/虚位移法/齿槽转矩Key words
fractional-slot concentrated winding/dual-rotor synchronous generator/virtual displacement method/cogging torque分类
信息技术与安全科学引用本文复制引用
秦臻,骆皓,胡皓宇,倪喜军,王明超..贯穿式FSCW定子轴向磁通双转子同步电机齿槽转矩分析[J].电机与控制应用,2026,53(5):523-535,13.基金项目
中国博士后科学基金面上项目(2017M621086) （2017M621086）
江苏省配电网智能技术与装备协同创新中心开放基金项目(XTCX202405)General Program Supported by China Postdoctoral Science Foundation(2017M621086) （XTCX202405）
Open Fund Project Supported by Jiangsu Collaborative Innovation Center for Smart Distribution Network(XTCX202405) （XTCX202405）
