磁耦合谐振式无线电能传输系统距离特性分析
Analysis of Distance Characteristics of Magnetically-Coupled Resonant Wireless Power Transfer System
李新恒 1周小杰 1郭家稳 1娄树勇 1孙雯1
作者信息
- 1. 安徽科技学院 电气与电子工程学院,安徽 蚌埠 233100
- 折叠
摘要
在磁耦合共振系统中,相邻线圈之间距离的变化会影响传输性能.为了研究距离对系统传输性能的影响,建立了四线圈结构的磁耦合无线电能传输系统.基于互感耦合理论,得到了传输功率和效率与耦合系数之间的关系.在仿真分析和实验证据的验证下,发现耦合系数k23(发射线圈和接收线圈之间)是影响传输效率的最显著因素.在最佳k23下,传输效率会随着耦合系数k12(源线圈与发射线圈之间)的增大而增大;随着耦合系数k34(接收线圈与负载线圈之间)的增大,传输效率呈先增大后减小的趋势.同时推导了k12、k23、k34的理论计算公式,为无线电能传输系统的参数优化和传递效率的提高提供了参考.
Abstract
In a magnetically coupled resonance system,changes in the distance between adjacent coils can affect transmission performance.In order to explore the influence of distance on the transfer performance,a four-coil magnetically-coupled resonant wireless power transfer system is established.Based on the mutual inductance coupling theory,the relationship between the transfer power and efficiency and coupling coefficient is obtained.Supported by the simulation analysis and experimental evidences,it finds that the coupling coefficient k23(be-tween transmitter and receiver coils)is the most significant factor affecting the transfer efficiency.Under the op-timal k23,the transfer efficiency will increase with the coupling coefficient k12(between driver and transmitter coils).Besides,it will firstly increase and then decrease with the coupling coefficient k34(between receiver and load coils).Moreover,the theoretical calculation formula of k12,k23 and k34 is deduced,which can make a con-tribution to the optimization of parameters and improvement of transfer efficiency for the wireless power transfer system.
关键词
无线能量传输/磁耦合谐振/耦合系数Key words
wireless power transfer/magnetically-coupled resonance/coupling coefficient引用本文复制引用
出版年
2024
NETL
NSTL
万方数据