With the wide use of new energy vehicles, the research and development of high-performance generators become more important. The claw pole machine is very suitable to be used as an automobile generator because of its unique characteristics. However, its development is limited by the disadvantage of abundant harmonic content, especially when used with fractional slot concentrated winding layout. A novel dual-direction hybrid excitation generator (DDHEG) is proposed in this paper. It has dual 3-phase winding layout to reduce spatial subharmonic magnet motive force (MMF). Also, it uses dual 3-phase rectifier bridge circuit to reduce armature current, so as to reduce copper loss. It uses rotor sleeve to reduce the eddy current loss in the rotor and permanent magnets (PMs) caused by higher order harmonics. It has hybrid excitation from both directions to improve the efficiency and terminal voltage. The basic characteristics of DDHEG are analyzed by finite element analysis (FEA) method. The highlights of the proposed DDHEG are illustrated. The simulation results and experimental results reveal that the proposed DDHEG can effectively adjust the terminal voltage at different loads and reduce the harmonics and loss to a satisfied degree. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

---

双向混合励磁发电机的设计与分析

随着新能源汽车的广泛使用，高性能发电机的研发变得更加重要。爪极机因其独特的特性，非常适合用作汽车发电机。但其发展受限于谐波含量丰富的缺点，尤其是与分数槽集中绕组布局一起使用时。本文提出了一种新型双向混合励磁发电机（DDHEG）。它具有双三相绕组布局，以降低空间次谐波磁体动力 (MMF)。此外，它采用双三相整流桥电路来降低电枢电流，从而减少铜损。它使用转子套筒来减少由高次谐波引起的转子和永磁体（PM）中的涡流损耗。它具有双向混合励磁，以提高效率和端电压。采用有限元分析（FEA）方法分析了DDHEG的基本特性。说明了提议的 DDHEG 的亮点。仿真结果和实验结果表明，所提出的DDHEG能够有效调节不同负载下的端电压，将谐波和损耗降低到满意的程度。© 2022 日本电气工程师学会。由 Wiley Periodicals LLC 出版。仿真结果和实验结果表明，所提出的DDHEG能够有效调节不同负载下的端电压，将谐波和损耗降低到满意的程度。© 2022 日本电气工程师学会。由 Wiley Periodicals LLC 出版。仿真结果和实验结果表明，所提出的DDHEG能够有效调节不同负载下的端电压，将谐波和损耗降低到满意的程度。© 2022 日本电气工程师学会。由 Wiley Periodicals LLC 出版。