Design and Implementation of a 100 W Receiver for Wireless Power Transfer Using Coupled Magnetic Resonance

자기공명 무선전력전송용 100 W급 수신기 설계 및 제작

Kim, Seong-Min;Cho, In-Kui;Choi, Hyun-Chul

  • Received : 2015.09.25
  • Accepted : 2015.11.26
  • Published : 2016.01.31


In this paper, a receiver for wireless power transfer is proposed. The receiver consists of a 100 W rectifier in 1.8 MHz frequency band, and a constant current charger. In particular, two kinds of protection circuits are installed in the rectifier. They are a over-voltage protection circuit which block the input voltages greater than 30 V and a active-dummy load which maintains the receiver input impedance by automatically consuming the remaining input power. The constant current charger is designed to charge the battery with a charging current of up to 1 A. A wireless charging system is fabricated using the proposed receiver. The system is composed of a 130 W transmitter, two magnetic resonator, and proposed receiver for charging a 48 V Li-Ion battery using the coupled magnetic resonance method. By the measurement result, the system efficiency is about 54 %.


Wireless Charging;Magnetic Resonance;Full-Bridge Receiver;Constant Current Charger


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Grant : BK21플러스

Supported by : 경북대학교