Increase in Power Conversion Efficiency of Bidirectional DC-DC Converter Using 1: 1 Transformer and Pulse-Frequency Modulation Control
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- Title
- Increase in Power Conversion Efficiency of Bidirectional DC-DC Converter Using 1: 1 Transformer and Pulse-Frequency Modulation Control
- Authors
- Choi, Yoon-Geol; Lee, Sang-Won; Lee, Hyeon-Seok; Lee, Su-Chang; Kang, Bongkoo
- Date Issued
- 2018-12
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Abstract
- This paper proposes a circuit structure of bidirectional dc-dc converter. This structure uses two switches, two capacitors, a 1: 1 transformer, and a control circuit for pulse-frequency modulation. The windings of the transformer are connected in a series-aiding configuration to reduce current ripples and to increase power conversion efficiency eta(epsilon). The capacitors and the leakage inductance of the transformer provide soft-switching conditions. When the proposed converter was designed to operate at a switching frequency of 110-240 kHz, input/output voltages of 100-400 V, and output power P-o of 30-300 W, eta(epsilon) was >= 97% for P-o >= 90W and 93.5% at P-o = 30 W. Experimental results show that the proposed converter is suitable for use in photovoltaic power conversion systems and energy storage systems.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/98656
- DOI
- 10.1109/TPEL.2018.2809682
- ISSN
- 0885-8993
- Article Type
- Article
- Citation
- IEEE TRANSACTIONS ON POWER ELECTRONICS, vol. 33, no. 12, page. 10539 - 10549, 2018-12
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