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무선전력전송 시스템을 위한 6.78 MHz 20W 클래스 E형 전력 증폭기
양종렬(Jong-Ryul Yang),손현창(Hyun-Chang Son),김진욱(Jin-Wook Kim),박영진(Young-Jin Park),김관호(Kwan-Ho Kim) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7
A class E power amplifier is demonstrated for application to a wireless power transfer system. The amplifier consists of input matching circuits, a RF power transistor as a switching device, and a load network with a lumped element matching circuit. The discrete components in the load network are designed with parallel circuit to reduce the efficiency degradation due to the parasitic resistance and characteristic variation. The single-ended amplifier with 20 V supply voltage shows 21.7 W output power and 81.6% power added efficiency at 6.78 MHz.
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.