著者

Hiroki Ishida Tomoaki Kyoden Hiroto Furukawa

出版者

The Institute of Electrical Engineers of Japan

雑誌

IEEJ Journal of Industry Applications (ISSN:21871094)

巻号頁・発行日

vol.11, no.1, pp.59-68, 2022-01-01 (Released:2022-01-01)

参考文献数

26

被引用文献数

2

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In this study, parity-time symmetry (PTS) was applied to a wireless power transfer (WPT) system in the low-frequency range of 30-40kHz. A series-parallel topology was analyzed using the coupled mode theory. It was demonstrated that PTS can be preserved over a long transmission distance even at low frequencies by reducing the self-inductance of the receiver coil. The receiver solenoid coil (dimensions: 71 × 30 × 7.4mm, mass: 45.6g, self-inductance: 119µH) was able to maintain a transmission power of 23±1W and an efficiency of 83±1% within a distance of 12-40mm. In addition, the suitable coil orientation range was significantly increased from ±5° to ±65°. The power conversion efficiency of a switching-mode amplifier based on a class-D inverter reached 97% at low frequency. These results are expected to contribute to the expansion of PTS-WPT applications.