Unequal-Thickness Flat Wire Winding-Based Eddy Current Loss Reduction for Coreless Axial Flux Permanent Magnet Synchronous Machine Adapted to Extended-Range Electric Vehicles

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NETL
NSTL
IEEE

外文摘要：Axial flux machines are increasingly attracting attention due to their power density and compact structure, making them particularly suitable for extended-range electric vehicles (EREVs). Among these, the coreless axial flux permanent magnet synchronous machine (CAFPMSM) with flat wire is renowned for its high copper filling, thermal conductivity, and efficiency. However, the flat wire in CAFPMSM is subject to substantial eddy current losses induced by the magnetic field. To mitigate eddy current loss, an unequal-thickness winding structure with multilayer flat wire is proposed in this article. A mathematical model is first developed to quantify the eddy current losses based on the air-gap flux density distribution. The relationship between the thickness of each layer of the winding and the resulting eddy current loss is analyzed. Second, the proposed winding configuration is further evaluated through 3-D finite element analysis (FEA) to assess its effectiveness in reducing losses. Finally, comprehensive experiments are carried out to demonstrate the effectiveness of the unequal-thickness windings in reducing eddy current loss and improving the efficiency of the machine.

外文关键词：

Eddy currentsWindingsWireConductorsMagnetic fieldsAir gapsTransportationIronElectrificationMagnetic cores

作者：

Xiaoguang Wang、Hao Yin、Jian Ge、Mengkai Chen、Yifan Zhou、Zhiheng Lin、Renwei Yu、Wei Xu

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作者单位：

Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan, China

National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan, China

State Key Laboratory of Advanced Electromagnetic Technology, Huazhong University of Science and Technology, Wuhan, China

Department of Electrical Computer Engineering, University of Alberta, Edmonton, AB, Canada

RuiGe Mechanical and Electrical (Wuhan) Company Ltd., Wuhan, China

Key Laboratory of High Density Electromagnetic Power and Systems, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China|School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, China

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出版年：

2025

DOI：

10.1109/TTE.2024.3471683

IEEE transactions on transportation electrification

ISSN：

年,卷(期)：2025.11(2)

参考文献量25