文献类型：期刊文献

中文题名：基于新型八开关七电平逆变器的高效WPT系统

英文题名：Efficient WPT system based on new eight-switch seven-level inverter

作者：常雨芳[1];沈权[1];饶天彪[1];严怀成[2];黄文聪[1]

机构：[1]湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室,湖北武汉430068;[2]华东理工大学信息科学与工程学院,上海200237

年份：2025

卷号：29

期号：11

起止页码：120

中文期刊名：电机与控制学报

外文期刊名：Electric Machines and Control

收录：;EI(收录号：20260720067516);北大核心:【北大核心2023】；

基金：国家自然科学基金(62473133)。

语种：中文

中文关键词：无线电能传输;效率优化;最大效率追踪;七电平逆变;耦合系数估计

外文关键词：wireless power transfer;efficiency optimization;maximum efficiency tracking;seven-level inverter;coupling coefficient estimation

摘要：无线电能传输(WPT)系统高频逆变器输出基波分量较低,导致传输效率不足,同时易受耦合系数以及负载变化影响,造成传输效率波动。针对上述问题,本文提出一种基于新型八开关七电平逆变器的WPT系统及其最大效率追踪策略。首先,以LCC-S型WPT系统为研究对象,分析系统参数和传输效率之间关系。其次,对比WPT系统中逆变器不同电平输出下的基波分量,在此基础上提出一种新型八开关七电平逆变器拓扑结构,对开关管进行导通角优化,证明该结构可以对WPT系统进行效率优化。然后,推导实时耦合系数方程,提出一种复合最大效率追踪策略,通过系统中相应电压电流信号的实时采集,实现耦合系数估计,同时利用Buck-Boost电路实现阻抗匹配,实现耦合系数和负载变化下的最大效率追踪要求。最后,搭建实验平台,验证系统的高效性和高效率追踪特性。
The wireless power transfer(WPT)system exhibits a low output fundamental wave component,resulting in reduced transmission efficiency and susceptibility to fluctuations caused by variations in coupling coefficient and load.To address the above issues,a WPT system based on a novel eight-switch seven-level inverter and its maximum efficiency tracking strategy were proposed.Firstly,focusing on the LCC-S topology,the relationship between system parameters and transmission efficiency was analyzed.Secondly,based on a comparison of the fundamental components of high-frequency inverters with different output levels in WPT systems,a new eight-switch seven-level inverter topology was proposed and the switching tube angles was optimized accordingly.It has been demonstrated that the topology can optimize the efficiency of the WPT system.Subsequently,a real-time equation for the coupling coefficient was derived and a compound maximum efficiency tracking strategy was introduced.By acquiring voltage and current signals from the system in real-time,the coupling coefficient was estimated and a Buck-Boost circuit to achieve impedance matching that meets maximum efficiency tracking requirements under changes in both coupling coefficient and load conditions was employed.Finally,an experimental platform was constructed to validate the high-efficiency characteristics as well as efficient tracking capabilities of this system.