Dual reactive coil application method of wireless power transfer system for leakage magnetic field reduction and efficiency enhancement이중 리액티브 코일을 활용한 무선전력전송 시스템의 누설자기장 저감 및 효율 향상 방법

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The wireless power transfer (WPT) system generates high density leakage electromagnetic field (EMF) during the operation. The human exposure to leakage EMF has an adverse effect on human health. In order to reduce the leakage EMF, shielding method can be applied to the WPT system. The shielding methods in previous research reduce leakage EMF, but power transfer efficiency (PTE) of the WPT system has decreased. Therefore, a shielding method providing high shielding effectiveness (SE) without PTE degradation is necessary. This paper proposes a dual loop reactive shield application for the reduction of leakage EMF without PTE degradation. A proposed dual loop reactive shield generates in phase and out of phase magnetic field simultaneously. The out of phase magnetic field depresses leakage EMF, and the in phase magnetic field makes the increases of the PTE. A proposed method is verified for the cases of symmetric and asymmetric WPT systems, including misalignment conditions. The experimental results of the symmetric WPT system were 2.1% PTE increase with 55.5% SE in alignment condition, and 3.9% PTE increase with 53% SE in misalignment condition. In addition, the experimental results of the asymmetric WPT system were 1.6% PTE increase with 61.3% SE in alignment condition, and 2.7% PTE increase with 54.1% SE in misalignment condition.
Advisors
Ahn, Seungyoungresearcher안승영researcher
Description
한국과학기술원 :조천식녹색교통대학원,
Publisher
한국과학기술원
Issue Date
2021
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 조천식녹색교통대학원, 2021.8,[vi, 82 p. :]

Keywords

Wireless power transmission▼aElectromagnetic shielding▼aElectromagnetic compatibility▼aReactive shield▼aMulti loop coil; 무선전력전송▼a자기장 차폐▼a전자파 적합성▼a리액티브 실드▼a다중 루프 코일

URI
http://hdl.handle.net/10203/295755
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=962410&flag=dissertation
Appears in Collection
GT-Theses_Ph.D.(박사논문)
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