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학술지 Dual Receiver Coils Wireless Power Transfer System With Interleaving Switching
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저자
윤계석, 이상한, 조인귀, 이호진, 조규형
발행일
201812
출처
IEEE Transactions on Power Electronics, v.33 no.12, pp.10016-10020
ISSN
0885-8993
출판사
IEEE
DOI
https://dx.doi.org/10.1109/TPEL.2018.2824019
협약과제
18ZR1200, 지능형 전파센서 및 무선 에너지 전송 원천기술 개발, 이호진
초록
This letter presents a wireless power transfer (WPT) system for wristband device charging. By using dual receiver coils with power switches in an interleaved manner, the proposed WPT system can simultaneously operate to accumulate energy from the primary coil and transfer the previously accumulated energy to the battery in each coil. As a result, the WPT efficiency can be increased with the small coils, even at high load resistance. The proposed WPT system is theoretically analyzed by a lumped circuit model and verified by measurement using prototype boards. Compared with the conventional WPT structure that uses one receiver coil (2 cm × 5 cm), the proposed WPT system with two receiver coils (each 2 cm × 2.5 cm) achieved a 6.67% end-to-end power efficiency improvement at the output resistance of 100 廓 under the same condition of the coil dimension and the resonant frequency of 140 kHz.
키워드
Dual receiver coils, high efficiency, wireless power transfer (WPT), wristband wearable device
KSP 제안 키워드
Coil dimension, End to End(E2E), High load, Lumped circuit model, Power switch, Receiver Coil, Resonant frequency(Fr), Wearable device, Wireless Power Transfer (WPT) system, Wireless Power Transfer Systems(WPTS's), accumulated energy