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학술지 Method for Estimating Optimum Free Resonant Frequencies in Overcoupled WPT System
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저자
서동욱, 이재호
발행일
201704
출처
International Journal of Antennas and Propagation, v.2017, pp.1-6
ISSN
1687-5869
출판사
Hindawi Publishing
DOI
https://dx.doi.org/10.1155/2017/1830687
협약과제
16ZC3300, 상황인지 스마트카 퓨전 플랫폼 개발 및 지역 부품업체 지원사업, 박미룡
초록
In our previous work, we proposed the method to maximize the output power even in the overcoupled state of the wireless power transfer (WPT) system by controlling free resonant frequencies and derived closed-form expression for optimum free resonant frequencies of the primary and secondary resonators. In this paper, we propose the mutual coupling approach to derive the optimum free resonant frequencies and show the measured power transfer efficiency (PTE) using the transmission efficiency as well as the system energy efficiency. The results of the proposed approach exactly coincide with those of the previous work, and the fabricated prototype achieves the transmission efficiency of about 80% by tuning the free resonant frequencies to the optimum values in the overcoupled state.
KSP 제안 키워드
Closed-form expressions, Mutual coupling, Output power, Power Transfer Efficiency, Resonant frequency(Fr), System energy efficiency, Wireless Power Transfer (WPT) system, transmission efficiency
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