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초전도 코일을 적용한 자기공명방식 무선전력전송의 송 · 수신 코일 배열에 따른 효율 분석
강민상(Min-Sang Kang),최효상(Hyo-Sang Choi),정인성(In-Sung Jeong) 대한전기학회 2014 전기학회논문지 Vol.63 No.6
In this paper, we analyzed the efficiency of magnetic resonance wireless power transmission (WPT) using superconductor coil according to the changing position of transmission and receiving coils. We implemented a WPT system using a magnetic resonance at a frequency of 63.1 kHz. Transmission and receiving coils using superconductor coil were wound on a spiral manner of diameter 100mm. For comparison, transmission and receiving coils using normal conductor coil were designed under the same condition. At a distance of 50mm, we measured efficiency when transmission-receiving coils were matched 25%, 50%, 75% and 100%. When a superconductor coil was applied to the transmission and receiving units, efficiency of WPT was very high. In addition, in the case of the superconducting transmission-receiving coils, when coils matched 100% the efficiency was 30% and matched 25% the efficiency was 8%.
배터리 전극-전해질 계면에서 발생하는 이온농도 및 유동의 실시간 가시화
강민상(Min-Sang Kang) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
Recently, with the growth of the EV industry, the necessity of the next-generation battery becomes important. It is known that the dendrite in the lithium ion battery penetrates the separator to cause an electrical short, thereby degrading the capacity of the battery and causing a fire in the battery. However, there is a lack of research on how to reliably control this. Before studying how to control dendrites, this study proposes a device to properly observe dendrite growth. The device can monitor the formation and development of dendrites inside the battery and the resulting changes in ion concentration in real time. If the inside of battery is visualized in real time using the device, it would be possible to find a method to effectively suppress dendrites by controlling ion transfer and fluid flow, and it is expected that the performance of the battery could be improved.
Efficiency Enhancement of a Wireless Power Transmission System Applying a Superconducting Coil
Min-Sang Kang(강민상),Hyo-Sang Choi(최효상),In-Sung Jeong(정인성) 대한전기학회 2015 전기학회논문지 Vol.64 No.2
Due to high oil prices, environmental pollution, the study of electric vehicles have been actively promoted. Charger for the electric vehicle is being developed using wireless rather than cable options. In this paper, we got more efficiency from using a superconducting transmission coil compared to using a normal coil. We implemented a wireless power transmission system using a magnetic induction at a frequency of 63.1 kHz. For comparison, a transmitter was designed using a superconducting coil and a normal coil. In addition, a receiver used a normal coil to apply for electric vehicles. The applied voltage and current were12 V and 5 A. Efficiency at a distance of 40 ~ 80 mm was measured. As a result, the superconducting transmission coil had a higher efficiency than the normal transmission coil. However, the receiving coil should be normal conductor for stable operation considering that it was put in moving electric vehicle. The efficiency was increased to 44 % at a distance of 40 mm when the diameter of normal receiving coil was 120 mm.
배터리 전극-전해질 계면에서 발생하는 이온농도 및 유동의 실시간 가시화
강민상(Min-Sang Kang) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
Recently, with the growth of the EV industry, the necessity of the next-generation battery becomes important. It is known that the dendrite in the lithium ion battery penetrates the separator to cause an electrical short, thereby degrading the capacity of the battery and causing a fire in the battery. However, there is a lack of research on how to reliably control this. Before studying how to control dendrites, this study proposes a device to properly observe dendrite growth. The device can monitor the formation and development of dendrites inside the battery and the resulting changes in ion concentration in real time. If the inside of battery is visualized in real time using the device, it would be possible to find a method to effectively suppress dendrites by controlling ion transfer and fluid flow, and it is expected that the performance of the battery could be improved.
초전도 적층 코일을 적용한 자기공진방식 무선전력전송 효율
강민상 ( Min Sang Kang ) 조선대학교 공학기술연구원 2014 공학기술논문지 Vol.7 No.1
본 논문에서는 자기공명 무선전송시스템에 초전도 적층 코일을 적용하였다. 초전도 코일은 기존의 상전도 코일과 비교해 효율과 거리를 늘릴 수 있었다. 이에 따라 본 논문에서는 송·수신부에 적용된 초전도 적층 코일의 효율을 측정하였다. 적층코일의 내부반경을 달리해 효율을 측정하였다. 실험결과, 코일의 내부 반경이 큰 초전도 적층 코일의 효율이 높게 나타났다.