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공진형 무선전력전송 대역의 100kHz~10MHz 자기장에 의한 인체유도전류계산과 전자기장 인체보호기준 분석
신한수(Hansu Shin),송혜진(Hye-Jin Song),변진규(Jin-Kyu Byun) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.2
As the technologies such as middle-range resonant WPT (wireless power transfer) advance that utilizes medium and low-frequency magnetic field, the importance of safety of such magnetic field is growing. The research on the effect of electromagnetic field on the human body has been mainly done on the GHz range of mobile phones, or 50~60Hz range of electric power systems. However, there has been relatively few works on the 100kHz~10MHz range used in the resonant wireless power transfer. Since there is a difference in the limiting value of magnetic field between widely used ICNIRP EMF guideline and IEEE C95.1 standard, there can be possible confusion when establishing EMF (Electromagnetic Field) standard on the wireless power transfer device in the future. In this paper, the induced current in the human body, which is the basic restriction of the EMF guideline, is calculated using Quasi-static FDTD method when 3D high-resolution human model is exposed to the 100kHz~10MHz magnetic field. Using this result, the feasibility of the magnetic field reference level in the ICNIRP guideline is analyzed.
표준화된 인체모델을 이용한 공진형 무선전력전송 시스템의 효율 변화 및 인체 안전성 분석
신한수(Hansu Shin),변진규(Jin-Kyu Byun) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.11
In this paper, resonant wireless power transfer systems are designed with double loop resonant coils for the resonant frequency of 150kHz. The transfer efficiency characteristics is analyzed according to the coil size, and the distance and misalignment between the coils. Then the change in efficiency is investigated when a human model is located between the resonant coils using the homogeneous human phantom of IEC-62311 standard. Also, in order to assess the safety of the wireless power transfer system, the induced current density inside the human model is calculated when it is exposed to the magnetic field of a plane wave and resonant coil. Then, the results are compared with the exposure limits in the EMF (electromagnetic field) safety guidelines.