Three-Port Converter for Integrating Energy Storage and Wireless Power Transfer Systems in Future Residential Applications

Hyeon-Seok Lee and Jae-Jung Yun
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Hyeon-Seok Lee: Department of Electrical Engineering, POSTECH, Pohang 37673, Korea
Jae-Jung Yun: Department of Electronics and Electrical Engineering, Daegu University, Gyeongsan 38453, Korea

Energies, 2020, vol. 13, issue 1, 1-16

Abstract: This paper presents a highly efficient three-port converter to integrate energy storage (ES) and wireless power transfer (WPT) systems. The proposed converter consists of a bidirectional DC-DC converter and an AC-DC converter with a resonant capacitor. By sharing an inductor and four switches in the bidirectional DC-DC converter, the bidirectional DC-DC converter operates as a DC-DC converter for ES systems and simultaneously as a DC-AC converter for WPT systems. Here, four switches are turned on under the zero voltage switching conditions. The AC-DC converter for WPT system achieves high voltage gain by using a resonance between the resonant capacitor and the leakage inductance of a receiving coil. A 100-W prototype was built and tested to verify the effectiveness of the converter; it had a maximum power-conversion efficiency of 95.9% for the battery load and of 93.8% for the wireless charging load.

Keywords: energy storage system; wireless power transfer system; DC-DC power conversion; photovoltaic power system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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