2015 年 4 巻 3 号 p. 220-226
Wireless power transmission (WPT) utilizing magnetic-field resonance has been given increasing attention by power electronics engineers and industries. Actually, many technical papers related to WPT circuits based on magnetic-field resonance have been published to verify their high-efficiency power transmission characteristics. However, a 10MHz-class high-frequency power supply suitable for high-power transmission systems has not been studied sufficiently, although small power rating converters such as the direct-current resonance class-E multi-resonant ZVS WPT system with a 74.9W output power have been proposed. Hence, the authors propose a new circuit topology for high-power and high-frequency inverter systems suitable for high-power WPT. In this paper, the authors propose a novel high-frequency current-output-type inverter circuit topology utilizing an immittance conversion element and WPT circuit, which utilize LC anti-resonant circuits suitable for the proposed current-output-type inverter. As a result of the prototype test, the proposed inverter provides a high conversion efficiency of more than 88.8% at 11.33MHz operation with a 142.1W output power rating. Also, the proposed WPT circuit suitable for the current-output-type inverter provides a high transmission efficiency of more than 94.1% at 11.33MHz with 2cm transmission gaps and a 46.1W output power.
J-STAGEがリニューアルされました！https://www.jstage.jst.go.jp/browse/-char/ja/
