基于磁耦合电动汽车无线电能传输教学实训平台研究与实践

Research and Practice on Electric Vehicle Wireless Power Transfer Teaching Platform Based on Magnetic Coupling

针对目前无线电能传输教学实训平台理论教学与实训脱节,使得学生对无线电能传输运行机理的认识不够深入。为激发学生学习兴趣,增强教学效果,以电动汽车无线电能传输为应用背景,对传统无线电能传输系统架构进行设计。基于基波等效法和基尔霍夫电压定律建立无线电能传输的几种典型结构数学模型,分析在谐振状态下不同结构的输出电压、电流、功率以及传输效率等特性。介绍无线电能传输教学实训平台的搭建过程,包括逆变器、整流器、磁耦合结构的设计和利兹线的计算选择等。在教学实训平台验证了几种典型无线电能传输结构的工作特性,使学生增强电力电子实践能力的同时对无线电能传输系统有更深入的认识。

Wireless power transfer(WPT)currently develops rapidly and can be applied in many fields.However,the teaching practical system for WPT is not comprehensive enough,and students'understanding of it is not deep enough.In order to stimulate students'interest and achieve good teaching results,this paper takes the wireless charging system of electric vehicles as the application background,and introduces the traditional wireless charging system architecture.Next,mathematical models of typical structures are established based on the fundamental harmonic approximation method and Kirchhoff's voltage law,the output voltage,current,power,and transmission efficiency characteristics of different structures under the resonant state are analyzed.Besides,an introduction is given to the design of the inverter and the rectifier,the magnetic coupling structure,and the selection of Litz wires for the wireless charging experimental platform.Finally,the output characteristics of various wireless charging structures are verified on the platform,enabling students to enhance their practical abilities in power electronics while gaining a more intuitive understanding of the wireless charging system.