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Soft-switching operation of the dual-interleaved boost converter over all duty ratios

Ahmed, Md Rishad; Todd, Rebecca; Forsyth, Andrew John

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Authors

Rebecca Todd

Andrew John Forsyth



Abstract

To extend the operating range of the snubber assisted zero-voltage and zero-current transition dual-interleaved boost converter beyond its inherent soft-switching limit of D = 0.5, a resonant pulse transformer is proposed instead of the resonant inductor. The 1: 2 turns ratio of the transformer ensures full discharge of the snubber capacitor at all duty ratio values to facilitate zero-voltage zero-current switching at turn on of the main switching devices. The effectiveness of the topology has been confirmed by SPICE simulation and demonstrated by a 20 kW SiC metal-oxide-semiconductor field-effect transistor converter. The prototype operated at 20 kW, 112 kHz, 320-600 V achieving 98.7% efficiency and achieved 98.2% efficiency at 6 kW. Taking the additional losses in the auxiliary circuit into account, the switching losses at 20 kW are reduced by 74% compared with hard-switching operation, representing a 54% reduction in overall losses.

Citation

Ahmed, M. R., Todd, R., & Forsyth, A. J. (2017). Soft-switching operation of the dual-interleaved boost converter over all duty ratios. IET Power Electronics, 10(11), 1250-1258. https://doi.org/10.1049/iet-pel.2016.0861

Journal Article Type Article
Acceptance Date May 24, 2017
Online Publication Date Sep 14, 2017
Publication Date Sep 9, 2017
Deposit Date Jul 20, 2020
Publicly Available Date Mar 29, 2024
Journal IET Power Electronics
Electronic ISSN 1755-4543
Publisher Institution of Engineering and Technology (IET)
Peer Reviewed Peer Reviewed
Volume 10
Issue 11
Pages 1250-1258
DOI https://doi.org/10.1049/iet-pel.2016.0861
Public URL https://nottingham-repository.worktribe.com/output/4778389
Publisher URL https://ieeexplore-ieee-org.ezproxy.nottingham.ac.uk/abstract/document/8032517
Additional Information This paper is a postprint of a paper submitted to and accepted for publication in IET Power Electronics and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library.

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