磁耦合无线电能传输系统实本征态工作模式及能效特性分析  

Real Eigenstate Operating Modes and Energy Efficiency Characteristic Analysis of Magnetic Coupling Wireless Power Transfer System

作　　者：廖志娟 冯其凯 吴凡 姜陈慧 夏晨阳 LIAO Zhijuan;FENG Qikai;WU Fan;JIANG Chenhui;XIA Chenyang(School of Electrical and Power Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学电气与动力工程学院,江苏省徐州市221116

出　　处：《电力系统自动化》2022年第3期164-174,共11页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(52007188);江苏省自然科学基金资助项目(BK20200659)。

摘　　要：针对目前宇称时间(PT)对称磁耦合无线电能传输(MC-WPT)系统的物理原理、参数条件及其与常用工作模式的区别等方面认识不全面的问题,首先基于振动学理论对PT对称MC-WPT系统进行建模分析,明确其实质为实本征态工作模式,并建立了实本征态系统的一般参数条件。进而从实本征态角度,对比分析了基于运算放大器实现和基于逆变器实现的PT对称系统的物理原理,证实基于运算放大器实现的PT对称系统物理原理为自激振荡系统,具有自选频率特性,而基于逆变器实现的PT对称系统本质上是强迫响应系统,工作频率由逆变器给定。在此基础上,将PT对称系统与目前MC-WPT系统常用的几种工作模式包括零相角模式、美国麻省理工学院(MIT)提出的共振耦合模式、复本征态模式进行了对比分析,得到了各种工作模式的特性及优缺点。Currently,the parity-time(PT)symmetric mode of magnetic coupling wireless power transfer(MC-WPT)systems is not fully understood in terms of physical principles,parameter conditions and the difference from common operating modes.Aiming at this problem,the PT-symmetric MC-WPT systems is modeled and analyzed based on the vibrational theory.It is demonstrated that the PT-symmetric mode is essentially a real eigenstate mode,and the general parameter conditions of the real eigenstate mode are derived.From the perspective of real eigenstate,the physical principles of the PT-symmetric systems based on the operational amplifier and the inverter are compared and analyzed.It is proved that the PT-symmetric system based on the operational amplifier is a self-excited oscillation system with the self-selected frequency characteristic.While the PT-symmetric system based on the inverter is essentially a forced response system and the operating frequency is given by the inverter.On this basis,the PT-symmetric system is compared with several common operating modes of the MC-WPT system,including the zero phase angle mode,magnetic resonance mode proposed by Massachusetts Institute of Technology(MIT)of USA and complex eigenstate mode.The characteristics,advantages and disadvantages of each operating mode are obtained.

关 键 词：无线电能传输 磁场耦合 实本征态 宇称时间对称 自激振荡 能效特性 

分 类 号：TM724[电气工程—电力系统及自动化]