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http://dx.doi.org/10.5515/KJKIEES.2014.25.6.679

Performance Improvement Using Real-Time Detection of Time-Variant Load Impedance of the Receiver in Wireless Power Transfer System  

Jang, Hyeong-Seok (Department of Electrical Engineering, KAIST)
Tae, Hyun-Sung (Department of Electrical Engineering, KAIST)
Kim, Kwang-Seok (Department of Electrical Engineering, KAIST)
Yeo, Tae-Dong (Department of Electrical Engineering, KAIST)
Oh, Kyoung-Sub (Department of Electrical Engineering, KAIST)
Yu, Jong-Won (Department of Electrical Engineering, KAIST)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.25, no.6, 2014 , pp. 679-689 More about this Journal
Abstract
In this paper, an analysis of the effect of time-variant reflected impedance and its detection method on wireless power transfer(WPT) systems are presented. The reflected resistance at WPT systems is very important parameter as it indicates how well matched antenna is and will exhibit high efficiency. Proposed detection method is based on transmitter current variation analysis with respect to frequency sweep. Using the proposed design method, a wireless power transfer system operating at the frequency of 125 kHz, is design and detect reflected impedance variation. The proposed design method provides good agreements between measured and simulated results. Therefore, The proposed detecting method provides a nonintrusive method to detect harmful object in WPT system.
Keywords
Wireless Power Transfer; Reflected Impedance; Foreign Object Detection;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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