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조현익,배홍국 한국체육과학회 2004 한국체육과학회지 Vol.13 No.2
This study attempted to clarify the relationship between flow experience that could be extracted by participation of squash and life satisfaction. Total of 320 squash members were collected as a sample, and structured questionnaire was distributed as instrument of study. The t-test, one-way ANOVA, and multiple regression were used by SPSS 11.0 in order to aanalize data. The significant level was set as =.05.The results of this study formulated conclusion as followings.1. Male had higer flow experience than female had.2. Behavior flow experience showed significant according to age difference.3. There was nothing difference found according to income.4. Flow experience rise after 6 months participation by regular basis.5. Cognition flow experience influenced on life satisfaction.
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Evaluation of Electromagnetic Exposure in Wireless Power Transfer Systems for Electric Vehicles
방경원,박상욱,배홍국,이병윤,오희명,박창운,백승혁 한국전자파학회 2024 Journal of Electromagnetic Engineering and Science Vol.24 No.1
In wireless power transfer (WPT) systems, the electromagnetic fields generated by a charging module may exceed the limits set by international safety guidelines. This is a matter of concern for the safety of users of high-power WPT systems, such as electric vehicles (EVs). To address this issue, this study designed a stationary WPT system for EV charging. Furthermore, the dosimetry of the system was evaluated for two exposure scenarios. Electromagnetic field data obtained using the electromagnetic field analysis tool were employed to derive the induced quantities in the human body using the impedance method. In addition, the obtained results were compared to the values recommended by international guidelines (International Commission on Non-Ionizing Radiation Protection).
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무선전력전송 시스템을 위한 커플러의 음영지역 분석 및 개선방법
방경원,박상욱,배홍국 한국전자파학회 2024 한국전자파학회논문지 Vol.34 No.1S
In this study, the null-power point phenomenon, which occurs in a wireless power transfer system, was analyzed. The null-power point occurs because of the coupling level between the couplers and can be designed based on the shape of the coupler. To overcome this null-power point, we propose a stacked capacitive power transfer (CPT) coupler with a front panel area ratio of 90 %, which can be effectively used in the implementation of a multiple-input single-output CPT system. 본 연구에서는 무선전력전송 시스템의 음영지역(null-power point) 현상의 발생 요인을 분석하고, 이를 설계 및 극복하는 방법에 대해 논의한다. 음영지역은 커플러 간 결합 수준을 요인으로 발생하며, 커플러의 모양에 의해 설계될 수 있다. 음영지역 극복을 위해 90 %의 앞면 판 면적비를 가지는 적층형(stacked) CPT 커플러가 제안되었으며, 이는 다중송신 단일수신(MISO, multiple input single output) CPT 시스템의 구현에 효과적으로 이용될 수 있다.
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무선전력전송 시스템을 위한 커플러의 음영지역 분석 및 개선방법
방경원(Kyeung-Won Bang),박상욱(Sang-Wook Park),배홍국(Hong-Guk Bae) 한국전자파학회 2024 한국전자파학회논문지 Vol.35 No.1
본 연구에서는 무선전력전송 시스템의 음영지역(null-power point) 현상의 발생 요인을 분석하고, 이를 설계 및 극복하는 방법에 대해 논의한다. 음영지역은 커플러 간 결합 수준을 요인으로 발생하며, 커플러의 모양에 의해 설계될 수 있다. 음영지역 극복을 위해 90 %의 앞면 판 면적비를 가지는 적층형(stacked) CPT 커플러가 제안되었으며, 이는 다중송신 단일수신(MISO, multiple input single output) CPT 시스템의 구현에 효과적으로 이용될 수 있다. In this study, the null-power point phenomenon, which occurs in a wireless power transfer system, was analyzed. The null-power point occurs because of the coupling level between the couplers and can be designed based on the shape of the coupler. To overcome this null-power point, we propose a stacked capacitive power transfer (CPT) coupler with a front panel area ratio of 90 %, which can be effectively used in the implementation of a multiple-input single-output CPT system.
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