模块化多端口无线电能传输系统建模与控制

Modeling and Control of Modular Multiport Wireless Power Transfer System

近年来,无线电能传输(WPT)技术凭借其高便利性、高可靠性、高传输效率等优点快速发展。现有针对WPT的研究集中在单输入单输出(SISO)方面,无法满足多输入多输出(MIMO)系统的应用需求。针对这一现状,此处提出了一种新颖的模块化多端口WPT(MMWPT)系统。该系统能够通过相位控制实现端口在零电压开关(ZVS)状态下的能量交互,由多个相同的模块化端口通过磁耦合组成,具有高度可重构性与灵活性。首先对MMWPT系统进行建模,基于建模推导系统的功率传输特性。随后详细介绍系统功率控制方法、ZVS实现原理与工况分析。最终,通过搭建一个三端口、工作频率为250kHz的实验平台验证了MMWPT系统的可行性与理论分析的正确性。

In recent years,wireless power transfer(WPT)technology has developed rapidly due to its advantages of high convenience,high reliability and high transmission efficiency.Most of existing researches on WPT focus on single-input single-output(SISO),which cannot meet the application requirements of multiple-input multiple-output(MIMO)systems.In response to this situation,a novel modular multiport WPT(MMWPT)system is proposed.This system enab-les energy interaction between ports in a zero-voltage switching(ZVS)state through phase control.Composed of iden-tical magnetically coupled modules,the system is highly reconfigurable and flexible.Firstly,MMWPT system is model-ed,and the power transfer characteristics of the system are derived based on modeling.Moreover,system power control methods,implementation principle of ZVS and working conditions analysis are introduced in detail.Finally,the feasi-bility of MMWPT system and the correctness of theoretical analysis are verified by building an experimental plaform with three-port and working frequency of 250 kHz.