상세정보
학술지
Analysis of Coil-Thickness-Variation Technique for Q-Factor Enhancement of Rectangular Planar Coils
- 저자
- 문정익, Charles Marfo Awuah, Patrick Danuor, 정영배
- 발행일
- 202302
- 출처
- IEEE Transactions on Antennas and Propagation, v.71 no.2, pp.1875-1882
- ISSN
- 0018-926X
- 출판사
- IEEE
- 협약과제
- 22HH3700, 1㎾급 로봇용 초소형/고효율 무선충전 상용화 기술개발, 문정익
- 초록
- For wireless power transfer (WPT) applications, such as battery charging, the attainment of a high coil quality factor ( Q ) becomes prudent to ensure a high-power transfer efficiency (PTE). In this article, we demonstrate an effective method to enhance Q by employing different thicknesses for each trace of the coil. The thickness of the inner turns of the coil, where high alternating current (ac) losses are concentrated, is relatively smaller compared to the outer coil turns. This technique realizes a reduction in the ohmic resistance, thereby increasing Q of the coil. Furthermore, we present the analysis on the performance of the conventional coils with the same turn thicknesses compared to the proposed coil. To validate this technique, the prototypes of both the proposed and conventional coil structures are fabricated, where good agreement is achieved between the simulation and measurement results. The proposed coil realizes an increment of about 11.54% in Q compared to the conventional coil.
- KSP 제안 키워드
- Coil turns, Different thicknesses, High power, Power Transfer Efficiency, Q-factor enhancement, Quality-factor(Q-factor), Simulation and measurement, alternating current(AC), battery charging, measurement results, ohmic resistance