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http://dx.doi.org/10.5515/KJKIEES.2016.27.1.84

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

Kim, Seong-Min (Radio Technology Research Department, ETRI)
Cho, In-Kui (Radio Technology Research Department, ETRI)
Choi, Hyun-Chul (Graduate School of Electronics Engineering, Kyungpook National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.27, no.1, 2016 , pp. 84-87 More about this Journal
Abstract
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 %.
Keywords
Wireless Charging; Magnetic Resonance; Full-Bridge Receiver; Constant Current Charger;
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