학술논문
Analysis and Design of Class-E ZVS Inverter with Parallel Circuit for MHz Wireless Power Transfer
Document Type
Conference
Source
2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) Power Electronics and Application Conference and Exposition (PEAC), 2018 IEEE International. :1-5 Nov, 2018
Subject
Language
Abstract
This paper proposes a design method of class-E inverter for the mega-hertz wireless power transfer (WPT) systems. It realizes zero voltage switching (ZVS) and reduces the peak switch voltage of inverter with load variation. Moreover, the design of four-coil WPT systems considering voltage limitation of compensation capacitors is also studied, and a prototype is built to verify the methods proposed. The peak voltage of switch decreases to about 3.4 times of the input DC voltage of class-E inverter, and varies less than 5% with load variation. With the coupling coefficient of 0.078 between transmitting and receiving coils, the system efficiency reaches 83.5% at the rated output power of 60 watts, and the inverter efficiency reaches 96.0%.