MCR-WPT系统负载特性分析及线圈参数设计  

Study of Load Characteristics and Design for Coil's Parameters in Magnetically-coupled Resonant Wireless Power Transmission System

作　　者：范兴明[1] 贾二炬 张鑫[1] 

机构地区：[1]桂林电子科技大学电气工程及其自动化系,广西桂林541004

出　　处：《高压电器》2018年第1期29-34,共6页High Voltage Apparatus

基　　金：国家自然科学基金(51067002);广西科学研究与技术开发项目(桂科重1348003-8);广西制造系统与先进制造技术重点实验室主任课题(16-380-12-006Z)~~

摘　　要：在磁耦合谐振式无线能量传输技术中,系统电气参数的变化会对传输性能产生重要的影响,因此,研究二者之间的关系对提高系统的传输性能具有重要意义。线圈作为该技术的核心部件,其参数的设计受到诸多因素的限制,如何兼顾系统的功率和效率对线圈参数进行合理的设计一直是该技术的难题。为此,文中基于等效电路理论建模,着重研究了系统的负载特性,结果表明:在磁耦合谐振式无线能量传输系统中,不存在最佳负载使系统的输出功率和传输效率同时达到最大。利用MATLAB验证了理论分析的正确性。其次,通过MATLAB仿真分析了线圈的匝数、平均半径对系统传输性能的影响规律。研究表明:在普通负载状态下,系统的输出功率随着线圈匝数和平均半径的增加均表现出先增加后减小的趋势。在此基础上,以60 W负载灯泡为例对线圈参数进行设计,在传输距离为0.5 m时,传输效率可达到94%。理论计算结果证明了参数设计的可行性和实用性。Serious influences on transmission properties will be exerted by the variations of systemic electrical parameters in magnetically- coupled resonant wireless power transmission （MCR- WPT） technology. So the investigation of relationships between them shows a material meaning in enhancing the transmission properties. The coil whose design is restricted by lots of factors is one of MCR-WPT system core components. How to capture the parameters which can achieve high efficiency and enough power has perplexed researchers for a long time. To this end, load property is emphasized to study through the equivalent circuit theory. Then the conclusion that the optimal load resistances which make output power and transmission efficiency maximal simultaneously is not subsistent is extracted. The validity of theory analysis is verified through MATLAB. Influence regulations of systemic transmission properties coming from coil＇ s average radium and number of turns are investigated by MATLAB simulation. The results show that the output power first increases and then decreases as the turns increase when the system works in normal load. Based on the former work, a design for 60 Watt bulb is presented as an example. The designed system can achieve the efficiency of 94 percent when the distance is 0.5 m. Calculation results verify the practicability and reasonability of the coil＇ s parameters.

关 键 词：磁耦合谐振 无线能量传输 电气参数 传输性能 参数设计 

分 类 号：TM724[电气工程—电力系统及自动化]