中国电机工程学报2026，Vol.46Issue(7)：2682-2692,中插6,12.DOI:10.13334/j.0258-8013.pcsee.250073
无线电能传输系统多股利兹线损耗分析及其分束补偿方法
Loss Analysis of Multi-stranded Litz Wire and Its Bundle Separation Compensation Method for Wireless Power Transfer System
摘要
Abstract
In low and medium frequency wireless power transfer(WPT)system,the loosely coupled transformer(LCT)is often wound with Litz wire.Incomplete stranding of Litz wire leads to unbalanced currents in each bundle,so this paper analyzes this phenomenon in detail,describes the effect of this phenomenon on coil loss,and proposes a novel bundle separation compensation method.Eliminating the requirement for extra components,this approach enables current equalization across all strand bundles of the Litz wire while preserving the system's inherent output characteristics,ultimately boosting overall transmission efficiency.First,the twisted structure of Litz wire is studied,and the reasons for unbalanced current in each bundle are analyzed by circuit modeling of a traditional S/S compensated WPT system.Then,a separate bundle compensation method is proposed,similarly by circuit modeling,the effect of balancing current and efficiency improvement of each bundle is analyzed.Finally,a 2kW prototype is built to verify the effectiveness and correctness of the proposed method.The experiments show that the output current of the system with the traditional and novel methods varies less than 1％under different load conditions.The light-load and full-load efficiency can be improved by 3.1％and 1.1％,respectively,while keeping the constant current output characteristics.关键词
无线电能传输/分束补偿/高效率/利兹线/损耗分析Key words
wireless power transfer(WPT)/bundle separation compensation/high efficiency/Litz wire/loss analysis分类
信息技术与安全科学引用本文复制引用
麦建伟,杨傲,张杰文,王懿杰,李陶,姚友素,徐殿国..无线电能传输系统多股利兹线损耗分析及其分束补偿方法[J].中国电机工程学报,2026,46(7):2682-2692,中插6,12.基金项目
国家自然科学基金项目(52407198,52277005) （52407198,52277005）
黑龙江省博士后科学基金(LBH-Z23163) （LBH-Z23163）
"新时代龙江优秀硕士、博士学位论文"资助(LJYXL2023-028).Project Supported by National Natural Science Foundation of China(52407198,52277005) （LJYXL2023-028）
Heilongjiang Postdoctoral Fund(LBH-Z23163) （LBH-Z23163）
Funding Project for"Outstanding Master's and Doctoral Dissertations in the New Era of Longjiang"(LJYXL2023-028). （LJYXL2023-028）
