Scheme for providing parity-time symmetry for low-frequency wireless power transfer below 20 kHz

被引：0
作者：
Hiroki Ishida
Hiroto Furukawa
Tomoaki Kyoden
机构：
[1] Okayama University of Science,Department of Applied Physics
[2] National Institute of Technology,undefined
[3] Toyama College,undefined
[4] National Institute of Technology,undefined
[5] Toyama College,undefined
来源：
Electrical Engineering | 2021年 / 103卷
关键词：
Wireless power transfer; Parity-time symmetry; Robust; Coupled-mode theory; Negative-resistance oscillator;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We provided parity-time symmetry (PT symmetry) for a magnetic resonance wireless power transfer (WPT) system designed to operate below 20 kHz. A lightweight coil having a mass of 39.1 g and consisting of a Mn–Zn ferrite core and 0.6-mm-diameter copper wire is considered herein. The coil had a Q factor of 111.5 at 16.5 kHz. The proposed system oscillated at 16.5 kHz for a transmission distance of 15 mm. A transmission power of 7.6 W was achieved when the DC power supply voltage was 100 V. Under these conditions, the power efficiency between the two coils was 92.1%. The oscillation frequency was automatically tuned to the optimal frequency for obtaining the maximum efficiency for a changing transmission distance. The relationship between the transmission power and the transmission distance was very different from that of a conventional WPT system, and an effect of PT symmetry clearly appeared.
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页码：35 / 42
页数：7
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