基于分时复合的无线供电三倍频逆变器.pdfVIP

2022 年 11 月 电 工 技 术 学 报 Vol.37 No. 21 第 37 卷第 21 期 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Nov. 2022 DOI:10.19595/j.cnki.1000-6753.tces.211205 基于分时复合的无线供电三倍频逆变器 赵建松 王军华 蔡昌松 牟建学 罗 阳 （武汉大学电气与自动化学院 武汉 430072 ） 摘要 受开关器件工作频率的限制，传统高频方波逆变器输出电压的频率难以提高，为满足无 线电能传输系统运行频率高频化的要求，该文基于传统移相全桥逆变器，提出一种输出方波频率为 开关器件工作频率3 倍的逆变器及其驱动策略，并分析了逆变器在无线电能传输系统等效模型下的 工作模态。与其他高频逆变器相比，其输出交流方波的频率提升为原来的3 倍，开关管的电流应力 降低为原来的 1/3，开关管发热损耗进一步降低，具有输出更高频率的潜力；同时采用软开关技术 保证逆变器较高的效率，并可利用简单成熟的移相控制方案或变频控制方案对输出功率进行调节。 最后搭建了用于无线供电系统的三倍频逆变器实验平台，验证了该逆变器理论分析的正确性和可行性。 关键词：分时 复合三倍频 逆变器 无线电能传输 中图分类号：TM464 Triple Frequency Inverter Based on Time-Sharing Composite for Wireless Power Transfer System Zhao Jiansong Wang Junhua Cai Changsong Mu Jianxue Luo Yang （School of Electrical Engineering and Automation Wuhan University Wuhan 430072 China ） Abstract Due to the limitation of the operating frequency of switching devices, the output frequency converted by conventional high-frequency inverters is difficult to increase.In order to meet the requirements of high-frequency operation of wireless power transfer (WPT) systems, an inverter and its driving strategy, whose output square wave frequency is three times the operating frequency of the switching device, are proposed based on conventional phase-shifting full-bridge inverters in this paper.The operating modes of the proposed inverter withan equivalent WPT model are also analyzed. Compared with other high-frequency inverters, the output frequency of the inverter is increased by three times, the current stress of the switches is reduced to one third of the original, and the heat loss of the switches is also decreased, and it has the