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

被引：7

作者：

Ishida, Hiroki ^{[1
]}

Furukawa, Hiroto ^{[2
]}

Kyoden, Tomoaki ^{[3
]}

机构：

[1] Okayama Univ Sci, Dept Appl Phys, Kita Ku, 1-1 Ridai Cho, Okayama 7000005, Japan

[2] Natl Inst Technol, Toyama Coll, Hongo Campus,13 Hongo Machi, Toyama, Toyama 9398630, Japan

[3] Natl Inst Technol, Toyama Coll, Imizu Campus,1-2 Ebie Neriya, Imizu, Toyama 9330293, Japan

来源：

ELECTRICAL ENGINEERING | 2021年 / 103卷 / 01期

基金：

日本学术振兴会;

关键词：

Wireless power transfer; Parity-time symmetry; Robust; Coupled-mode theory; Negative-resistance oscillator; TRANSMISSION;

D O I：

10.1007/s00202-020-01041-3

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

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 aQfactor 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.

引用

页码：35 / 42

页数：8

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