电机与控制应用2025，Vol.52Issue(4)：422-431,10.DOI:10.12177/emca.2025.018
分数槽集中绕组双转子异步电机起动转矩特性分析
Analysis of Starting Torque Characteristics of Fractional-Slot Concentrated Winding Dual-Rotor Asynchronous Motor
摘要
Abstract
[Objective]Fractional-slot concentrated winding(FSCW)dual-rotor motor,due to its unique winding distribution,generates abundant magnetomotive force harmonics in the air gap.During direct starting,the motor generates a large amount of inrush current and torque pulsation.To address this issue,this paper analyzes the electromagnetic torque characteristics under two starting methods-hard starting and soft starting-to evaluate whether these methods are conducive to the stable operation of the motor.Additionally,the validity of the virtual displacement method under these two starting conditions is verified.[Methods]This paper first introduced the basic structure and working principle of the FSCW axial dual-rotor motor.A mathematical model of the motor was then established based on winding theory.Based on simulation results,the transient and steady-state processes of hard and soft starting were analyzed,as well as the torque characteristics at different stator-rotor axial angles under both starting conditions.Next,the electromagnetic torque expression was derived based on the virtual displacement method.Finally,the electromagnetic torque under both starting conditions was discussed by combining the virtual displacement method and simulation results.[Results]Simulation data showed that during hard starting,the electromagnetic torque increased sharply,and the subsequent torque waveforms exhibited significant fluctuations and noticeable oscillations.Over time,the torque fluctuations gradually stabilized and reached a steady state,with the transient peak about twice the steady-state peak.Under both hard and soft starting conditions,the simulated electromagnetic torque was slightly lower than the result calculated by the virtual displacement method.The peak values and fluctuations of the simulation waveform showed significant variations when the stator-rotor axial angle was altered.[Conclusion]The results indicate that hard starting is not conducive to the stable operation of the motor.The stator-rotor axis angle affects both the magnitude of the electromagnetic torque and the torque pulsation.The simulated electromagnetic torque aligns well with the theoretical value,and the derived expression shows high accuracy,serving as a reference for subsequent calculations of the motor's electromagnetic torque.关键词
分数槽集中绕组/双转子电机/硬起动/软起动/电磁转矩/虚位移法Key words
fractional-slot concentrated winding/dual-rotor motor/hard starting/soft starting/electromagnetic torque/virtual displacement method分类
动力与电气工程引用本文复制引用
张一鸣,骆皓,朱正鹏,高阳,王子刚,周明杰..分数槽集中绕组双转子异步电机起动转矩特性分析[J].电机与控制应用,2025,52(4):422-431,10.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资助(XTCX202405)General Program of China Postdoctoral Science Foundation(2017M621086) （XTCX202405）
Project supported by Jiangsu Collaborative Innovation Center for Smart Distribution Network(XTCX202405) （XTCX202405）
