电机与控制应用2025，Vol.52Issue(5)：477-486,10.DOI:10.12177/emca.2025.023
基于Halbach型磁耦合机构的多负载WPT系统研究
Research on Multi-Load WPT System Based on Halbach-Type Magnetic Coupler
摘要
Abstract
[Objective]To address the issue of reduced transfer efficiency caused by cross-coupling among receiver coils in multi-load wireless power transfer(WPT)systems,this study proposes a multi-load WPT system based on Halbach-type magnetic couplers.[Methods]By controlling the excitation current direction of constituent coils in the transmitter unit and utilizing the combined magnetic effects of these coils,the Halbach-type magnetic coupler achieved dual regulation effects of magnetic field focusing and attenuation in target areas.Through finite element simulation modeling and optimized design of the magnetic coupler,the mutual inductance and magnetic field characteristics between the transmitter unit and receiver unit were analyzed.The principles of magnetic field focusing and attenuation were explained from the perspective of magnetic flux.Additionally,an SS-type equivalent circuit topology was constructed to derive the output characteristics of the system.Finally,an experimental platform was built to analyze and validate the variation patterns in mutual inductance,output characteristics,and magnetic attenuation performance of the system.[Results]Experimental results showed that the Halbach-type magnetic coupler exhibited the capabilities of bidirectional magnetic field focusing and attenuation.The distribution of magnetic field focusing and attenuation regions were spatially staggered,which effectively suppressed cross-coupling among receiver coils and reduced magnetic leakage in the system.When two receiver units were positioned 20 mm from the transmitter unit and both loads were 20 Ω,the system achieved a maximum overall transfer efficiency of 80.84％.[Conclusion]The Halbach-type magnetic coupler proposed in this study successfully addresses the issue of cross-coupling between receiver coils in multi-load WPT systems through asymmetric magnetic field regulation technology.Due to its modular unit structure,the system demonstrates excellent scalability.This modular design,characterized by its simplicity and flexibility,shows promising potential for broader applications in multi-load WPT systems.关键词
无线电能传输/Halbach型磁耦合机构/磁场聚集/磁场削弱Key words
wireless power transfer/Halbach-type magnetic coupler/magnetic field focusing/magnetic field attenuation分类
动力与电气工程引用本文复制引用
何继泊,曹桂梅,王豫,韩天浩,严仲明..基于Halbach型磁耦合机构的多负载WPT系统研究[J].电机与控制应用,2025,52(5):477-486,10.基金项目
磁浮技术与磁浮列车教育部重点实验室开放课题基金Foundation of Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle,Ministry of Education （）
