Harmonic balance design of wireless resonant-type power transfer links

2012 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications Pub Date : 2012-05-10 DOI:10.1109/IMWS.2012.6215803

F. Mastri, A. Costanzo, M. Dionigi, M. Mongiardo

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引用次数: 26

Abstract

Harmonic-balance (HB) based nonlinear techniques are exploited for the design of a high-efficiency and medium-power switching mode oscillator, used as continuous power source in a wireless power transmission system. The oscillator power is transmitted through resonant coils over variable distances. To account for the resonant frequency variations, which also tune oscillation frequency, a broadband design of the system is carried out with the oscillator load including the resonant coupling and the rectifier. The oscillator efficiency, the RF-to-DC system efficiency and the DC power are then directly optimized for any coupling distance of interest. A Royer-type oscillator is designed and prototyped using the proposed technique. The oscillator exhibits 40 W at 223 kHz with 75% conversion efficiency while the WPT system efficiency, DC-to-DC, is better than 60% for coupling distances of the order of 10 cm.

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无线谐振型输电链路的谐波平衡设计

利用谐波平衡非线性技术设计了一种高效、中功率的开关模式振荡器，作为无线电力传输系统的连续电源。振荡器功率通过谐振线圈在可变距离上传输。为了考虑谐振频率的变化，也调整了振荡频率，对系统进行了宽带设计，其中振荡器负载包括谐振耦合和整流器。振荡器效率、RF-to-DC系统效率和直流功率直接针对任何感兴趣的耦合距离进行优化。利用所提出的技术设计并制作了一个罗耶型振荡器。该振荡器在223 kHz时输出功率为40 W，转换效率为75%，而WPT系统的dc - dc效率在耦合距离为10 cm数量级时优于60%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2012 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications

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