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Al<sub>2</sub>O<sub>3</sub> 첨가에 따른 송전용 현수애자의 전기적 성능 평가 연구
최인혁,최장현,이동일,최연규,조한구,한세원,박영창,Choi, In-Hyuk,Choi, Jang-Hyun,Lee, Dong-Il,Choi, Yeon-Gyu,Cho, Han-Goo,Han, Se-Won,Park, Young-Chang 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.1
To analyze the reason of aging deterioration in transmission line insulators, we performed a various kind of test and investigated mechanical and electrical characteristics of insulators. Test samples consisted of K-1989(36,000lbs), K-1995(36,000lbs) and K-2001(36,000lbs) type insulators which have been used in domestic 154 kV transmission lines. As a result of this test, the facts turned out K-2001 insulator which contain 17 wt.% alumina has better physical characteristics than K-1989 insulator which contain 8 wt% alumina. Relativity density and fracture toughness of K-1989 porcelain are 94.2 % and 1.4 MPa\ulcornerm$^{1}$2// but relativity density and fracture toughness of K-2001 porcelain are 96 % and 1.7 MPa\ulcornerm$^{1}$2//. K-2001 insulators show a good performance not only in a physical property test but also in power arc test and steep front of wave flashover test which is performed to evaluate electrical characteristics.
자기 공명 무선 전력 전송 시스템에서 공진 코일의 배열에 관한 연구
김진욱(Jin-Wook Kim),지현호(Hyeon-Ho Ji),최연규(Yeon-Gyu Choi),윤영현(Young-Hyun Yun),김관호(Kwan-Ho Kim),박영진(Young-Jin Park) 한국전자파학회 2010 한국전자파학회논문지 Vol.21 No.6
본 논문에서는 자기 공명 방식의 무선 전력 전송 시스템에서 공진 코일의 배열에 따른 특성을 제시한다. 공진 코일에는 헬리컬 구조를 사용하였다. 공진 코일을 설계하기 위해 헬리컬 코일의 인덕턴스와 커패시턴스를 구하였다. 유한 요소법을 이용하여 설계된 공진 코일을 시뮬레이션 하였고, 송수전 공진 코일 간의 다양한 배열에 대한 특성을 해석하였다. 검증을 위하여 시제품을 제작하였고, 수직 및 평행 배열일 때의 효율을 측정하였다. 측정 결과, 평행 배열일 때는 50 %의 전달 효율을 얻을 수 있는 구간이 코일 지름의 2배 이내였고, 수직 배열일때는 코일 지름의 1.5배 이내였다. 제작한 시제품은 평행 배열된 송수전 공진 코일이 40 ㎝ 간격일 때 최대 84.25 %의 효율을 보였다. In this paper, characteristics on arrangement of coils in the wireless power transfer system based on magnetic resonance is presented. A helical structure is used for a self-resonant coil. To design a proper self-resonant helical coil, its inductance and capacitance are obtained. Using the finite element method, the self-resonant coil designed is simulated and characteristics of wireless power transfer with various arrangement between Tx and Rx resonant coils is analyzed. For verification, a prototype of a wireless power transfer system based on magnetic resonance is fabricated and efficiency of different arrangement such as both vertical and parallel arrangements is measured. From the measurement, transmission efficiency of 50 % for parallel arrangement is obtained within twice the diameter of the coil while for the vertical arrangement it is measured within one and a half diameter of the coil. Maximum efficiency of 84.25 % is observed at the distance 40 ㎝ from the resonant coil in the case of parallel arrangement.
자기 공진 형 무선전력전송 시스템에서 공진 코일의 배열에 따른 특성 분석
김진욱(Jin-Wook Kim),지현호(Hyeon-Ho Ji),최연규(Yeon-Gyu Choi),윤영현(Young-Hyun Yun),손현창(Hyeon-Chang Son),김관호(Kwan-Ho Kim),박영진(Young-Jin Park) 대한전자공학회 2010 대한전자공학회 학술대회 Vol.2010 No.6
In this paper, characteristics on arrangement of resonant coils in the wireless power transfer system based on magnetic resonance is presented. A helical structure is used for a self-resonant coil. To design a proper self-resonant helical coil, its inductance and capacitance are obtained. Using the finite element method (FEM), the self-resonant coil designed is simulated and characteristics of wireless power transfer with various arrangement between Tx and Rx resonant coils is analyzed.