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

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

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: Jul 20, 2020
• 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.