High-Efficiency Asymmetric Forward-Flyback Converter for Wide Output Power Range
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- Title
- High-Efficiency Asymmetric Forward-Flyback Converter for Wide Output Power Range
- Authors
- Hyeon Seok Lee; Choe, Hyung-Jin; Seok Hyeong Ham; Kang, B
- Date Issued
- 2017-01
- Publisher
- IEEE TRANSACTIONS ON POWER ELECTRONICS
- Abstract
- This paper proposes an asymmetric forward-flyback dc-dc converter that has high power-conversion efficiency ��e over a wide output power range. To solve the problem of ringing in the voltage of the rectifier diodes and the problem of duty loss in the conventional asymmetric half-bridge (AHB) converter, the proposed converter uses a voltage doubler structure with a forward inductor Lf in the second stage, instead of using the transformer leakage inductance, to control output current. Lf resonates with the capacitors in the voltage doubler to achieve a zero-voltage turn-on of switches and a zero-current turn-off of diodes for a wide output power range. The proposed converter could operate at a wider input voltage range than the other AHB converters. ��e was measured as 95.9% at output power Po = 100 W and as 90% at Po = 10 W, when the converter was operated at input voltage 390 V, output voltage 142 V, and switching frequency 100 kHz. ? 2016 IEEE.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/37156
- DOI
- 10.1109/TPEL.2016.2537930
- ISSN
- 0885-8993
- Article Type
- Article
- Citation
- IEEE TRANSACTIONS ON POWER ELECTRONICS, vol. 32, no. 1, page. 433 - 440, 2017-01
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