A Novel Soft-Switching Full-Bridge Converter With a Combination of a Secondary Switch and a Nondissipative Snubber
- Authors
- Dai-Duong Tran; Hai-Nam Vu; Yu, Sunho; Choi, Woojin
- Issue Date
- Feb-2018
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Circulating current; nondissipative snubber; soft-switching full-bridge (SSFB) converter; zero-current switching (ZCS) turn off; zero-voltage switching (ZVS) turn on
- Citation
- IEEE TRANSACTIONS ON POWER ELECTRONICS, v.33, no.2, pp.1440 - 1452
- Journal Title
- IEEE TRANSACTIONS ON POWER ELECTRONICS
- Volume
- 33
- Number
- 2
- Start Page
- 1440
- End Page
- 1452
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/32010
- DOI
- 10.1109/TPEL.2017.2688580
- ISSN
- 0885-8993
- Abstract
- In this paper, a novel soft-switching full-bridge converter with an additional secondary switch and a nondissipative energy recovery snubber is proposed. Thanks to the combination of an active switch and the capacitor-diode-diode snubber employed at the secondary side of the converter, the proposed converter can achieve zero-voltage zero-current switching for all of the primary switches and rectifier diodes over the entire load range. As a result, the rectifier diodes have no reverse-recovery problem and their ringing voltage is clamped. In addition, since no phase shift is used for the gate signals of the primary-side switches, the converter control can be implemented easily and it has no circulating current inherently. The converter exhibits a significant improvement in terms of efficiency, especially under light-load conditions, which is difficult to achieve with conventional phase-shift full-bridge converters. A 3-kW prototype circuit is implemented to verify the superior performance of the proposed converter.
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