A High-Efficiency Asymmetrical Half-Bridge Converter With Integrated Boost Converter in Secondary Rectifier

A conventional asymmetrical half-bridge (AHB) converter is one of the most promising topologies in low-to-medium power applications because of zero-voltage switching of all switches and small number of components. However, when the converter is designed taking a hold-up time into consideration, it has a large DC offset current in a transformer and a small transformer turns-ratio. To solve these problems, a new AHB converter with an integrated boost converter is proposed in this letter. Because the proposed converter compensates for the hold-up time using the integrated boost converter without additional loss in the nominal state, it can achieve the optimized efficiency regardless of the hold-up time. The effectiveness and feasibility are verifiedwith a 250-400-V input and 45 V/3.3 A output prototype.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2017-11
Language
English
Keywords

DC-OFFSET CURRENT; TRANSFORMER

Citation

IEEE TRANSACTIONS ON POWER ELECTRONICS, v.32, no.11, pp.8237 - 8242

ISSN
0885-8993
DOI
10.1109/TPEL.2017.2675283
URI
http://hdl.handle.net/10203/225066
Appears in Collection
EE-Journal Papers(저널논문)
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