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
刘羽 1余豪华 1彭博 2苏国栋3
作者信息
- 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
- 折叠
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％.
Abstract
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Key words
E-class power amplifier/mid-range wireless power transfer/impedance matching/efficiency optimization引用本文复制引用
基金项目
国网浙江省电力有限公司科技项目(YYKJ202006)
出版年
2024
国家科技期刊平台
NSTL
万方数据