基于E类功率放大器的四线圈中距离无线输电系统的优化设计  

Optimization design of four-coil mid-range wireless power transfer based on E-class amplifier

作　　者：刘羽 余豪华 彭博 苏国栋 LIU Yu;YU Haohua;PENG Bo;SU Guodong(State Grid Zhejiang Ningbo Fenghua Power Supply Co.,Ltd.,Ningbo 315000,Zhejiang,P.R.China;School of Automation,Chongqing University,Chongqing 400044,P.R.China;Chongqing Huachuang Intelligent Technology Research Institute Co.,Ltd.,Chongqing 402760,P.R.China)

机构地区：[1]国网浙江宁波市奉化区供电有限公司,浙江宁波315000 [2]重庆大学自动化学院,重庆400044 [3]重庆华创智能科技研究院有限公司,重庆402760

出　　处：《重庆大学学报》2024年第6期94-102,共9页Journal of Chongqing University

基　　金：国网浙江省电力有限公司科技项目(YYKJ202006)。

摘　　要：E类功率放大器由于具有拓扑简单、适用频率高、电能转换效率高等优点,是高频MHz级无线输电系统的理想电源。研究分析了四线圈无线输电系统的传输特性,提出传输效率的优化设计方法。同时,考虑到E类功率放大器的工作状态,提出通过激励线圈与发射线圈的距离调节,实现输入电阻的完美匹配,搭建了采用2.81 MHz的E类功率放大器的四线圈中距离无线输电系统。当传输距离为传输线圈边长的3.6倍时,系统电源端到负载端的整体电能传输效率为8.5%。The E-class power amplifier presents an ideal solution for high-frequency power supply applications,characterized by its simple topology,high operational frequency,and efficiency.This paper conducts a detailed analysis of the transfer characteristics of a four-coil wireless power transfer(WPT)system and proposes an optimal design method to achieve high transfer efficiency.Additionally,with considering the operating status of the E-class amplifier,perfect matching of input resistance is achieved by adjusting the distance between the driving coil and transmitting coil.A 2.81 MHz four-coil mid-range WPT system employing an E-class amplifier is established.At a transfer distance of 3.6 times the side length of the transfer coil,the overall transfer efficiency from the power source to the load reaches 8.5%.

关 键 词：E类功率放大器 中距离无线输电系统 阻抗匹配 效率优化 

分 类 号：TM724[电气工程—电力系统及自动化]