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Multiphysics Analysis of an Axial-Flux In-Wheel Motor With an Amorphous Alloy Stator

机译:无定形合金定子轴向磁通轴向轴承轴承型电动机的多体分析

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摘要

This paper presents a novel yokeless and segmented armature (YASA) axial-flux in-wheel motor with amorphous magnetic material (AMM) stator cores for a solar-powered electric vehicle. Although this new axial-flux in-wheel motor has many advantages such as high efficiency, shorter axial length, and high power density, its working condition is complicated. In-wheel motors are usually operated in electromagnetic, thermal, and other multiphysics environments. Increasing the performance requirements of in-wheel motors, such as power density, efficiency, and reliability, requires a multiphysics design approach. The focus of this paper is on the analysis of electromagnetic characteristics, losses, temperature distribution, mechanical behavior and other characteristics of the axial-flux in-wheel motor. The back electromotive force (EMF) and electromagnetic torque of the motor with harmonic current are obtained by the 3-D finite element method (FEM). The permanent magnet (PM) eddy-current losses when using different PM shapes are studied. The equivalent thermal model of the tape-wound AMM stator segments and the windings are established, and the temperature distribution of the motor is obtained. The mechanical behavior of the stator segments and the rotor disks when the motor is eccentric and axially offset is analyzed, and the structural strength of the motor is evaluated. Finally, a prototype of the motor is fabricated, and the electromagnetic performance and temperature of the motor are tested to verify the accuracy of the multiphysics design approach.
机译:本文呈现了一种新型的纱线和分段电枢(Yasa)轴向通量的轮式电动机,具有用于太阳能电动车辆的非晶磁性材料(AMM)定子芯。虽然这种新的轴向 - 助焊器内电机具有诸如高效率,轴向长度和高功率密度等优点,但其工作条件复杂化。轮内电机通常以电磁,热和其他多体性环境运行。提高车载车载电机的性能要求,例如功率密度,效率和可靠性,需要一种多体学设计方法。本文的重点是分析电磁特性,损耗,温度分布,机械性能等轴向磁通内电机的特性。通过3-D有限元方法(FEM)获得具有谐波电流的电动机的背部电动势(EMF)和电磁扭矩。研究了使用不同PM形状时的永磁体(PM)涡流损耗。建立了胶带伤口AMM定子区段和绕组的等效热模型,并且获得了电动机的温度分布。分析当电动机是偏心和轴向偏移时的定子段和转子盘的力学行为,评估电动机的结构强度。最后,制造电动机的原型,测试电动机的电磁性能和温度,以验证多体设计方法的准确性。

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