상세정보
학술지
Study on Two-Coil and Four-Coil Wireless Power Transfer Systems Using Z-Parameter Approach
- 발행일
- 201606
- 출처
- ETRI Journal, v.38 no.3, pp.568-578
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 협약과제
- 15MC2500, 만성질환 관리를 위한 인체삽입형 생리기능 자동감시 시스템 기술 개발, 이형수
- 초록
- A wireless power transfer (WPT) system is usually classified as being of either a two-coil or four-coil type. It is known that two-coil WPT systems are suitable for shortrange transmissions, whereas four-coil WPT systems are suitable for mid-range transmissions. However, this paper reveals that the two aforementioned types of WPT system are alike in terms of their performance and characteristics, differing only when it comes to their matching-network configurations. In this paper, we first find the optimum load and source conditions using Z-parameters. Then, we estimate the maximum power transfer efficiency under the optimum load and source conditions, and we describe how to configure the matching networks pertaining to both types of WPT system for the given optimum load and source conditions. The two types of WPT system show the same performance with respect to the coupling coefficient and load impedance. Further, they also demonstrate an identical performance in the two cases considered in this paper, that is, a strong-coupled case and a weak-coupled case.
- KSP 제안 키워드
- Coil type, Coupling Coefficient, Maximum Power Transfer(MPT), Mid-range, Network configuration, Optimum load, Power Transfer Efficiency, Wireless Power Transfer (WPT) system, Wireless Power Transfer Systems(WPTS's), Z-parameter, load impedance