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Interleaved ZVS DC‐DC converter with ultrahigh step‐down and flexible gain

Wahid Eskandary, Mohammad Monfared Orcid Logo, Ali Nikbahar, Ahmad Mahdave

IET Power Electronics

Swansea University Author: Mohammad Monfared Orcid Logo

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DOI (Published version): 10.1049/pel2.12730

Abstract

This paper proposes a novel non-isolated ultrahigh step-down interleaved DC-DC converter with an extremely extended duty cycle based on the series capacitor and coupled-inductor techniques. The proposed converter utilizes a three-winding coupled inductor (TWCI) to enhance the step-down conversion ra...

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Published in: IET Power Electronics
ISSN: 1755-4535 1755-4543
Published: Institution of Engineering and Technology (IET) 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa66751
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spelling v2 66751 2024-06-19 Interleaved ZVS DC‐DC converter with ultrahigh step‐down and flexible gain adab4560ff08c8e5181ff3f12a4c36fb 0000-0002-8987-0883 Mohammad Monfared Mohammad Monfared true false 2024-06-19 ACEM This paper proposes a novel non-isolated ultrahigh step-down interleaved DC-DC converter with an extremely extended duty cycle based on the series capacitor and coupled-inductor techniques. The proposed converter utilizes a three-winding coupled inductor (TWCI) to enhance the step-down conversion ratio. In contrast to conventional coupled inductor-based step-down converters, its voltage gain improves as the turn ratio approaches unity. Consequently, coupled inductors have significantly lower winding losses. Furthermore, there is no extra constraint on the turn ratio of the TWCI. It results in a highly flexible voltage gain and more design freedom. Other advantages of the employed series capacitor and coupled inductor techniques can be listed as, zero voltage switching (ZVS) condition for all switches, significant reduction of the total switching device power (SDP) and recovery of the energy of leakage inductors. They all reduce power losses and costs. Steady-state analysis, derivation of voltage gain and design considerations are discussed in detail. Finally, a 200 W, 400-to-12 V experimental prototype is implemented to verify the effectiveness and feasibility of the proposed converter. Journal Article IET Power Electronics Institution of Engineering and Technology (IET) 1755-4535 1755-4543 18 6 2024 2024-06-18 10.1049/pel2.12730 http://dx.doi.org/10.1049/pel2.12730 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University 2024-06-19T09:35:18.4708748 2024-06-19T09:31:38.0997350 Wahid Eskandary 1 Mohammad Monfared 0000-0002-8987-0883 2 Ali Nikbahar 3 Ahmad Mahdave 4
title Interleaved ZVS DC‐DC converter with ultrahigh step‐down and flexible gain
spellingShingle Interleaved ZVS DC‐DC converter with ultrahigh step‐down and flexible gain
Mohammad Monfared
title_short Interleaved ZVS DC‐DC converter with ultrahigh step‐down and flexible gain
title_full Interleaved ZVS DC‐DC converter with ultrahigh step‐down and flexible gain
title_fullStr Interleaved ZVS DC‐DC converter with ultrahigh step‐down and flexible gain
title_full_unstemmed Interleaved ZVS DC‐DC converter with ultrahigh step‐down and flexible gain
title_sort Interleaved ZVS DC‐DC converter with ultrahigh step‐down and flexible gain
author_id_str_mv adab4560ff08c8e5181ff3f12a4c36fb
author_id_fullname_str_mv adab4560ff08c8e5181ff3f12a4c36fb_***_Mohammad Monfared
author Mohammad Monfared
author2 Wahid Eskandary
Mohammad Monfared
Ali Nikbahar
Ahmad Mahdave
format Journal article
container_title IET Power Electronics
publishDate 2024
institution Swansea University
issn 1755-4535
1755-4543
doi_str_mv 10.1049/pel2.12730
publisher Institution of Engineering and Technology (IET)
url http://dx.doi.org/10.1049/pel2.12730
document_store_str 0
active_str 0
description This paper proposes a novel non-isolated ultrahigh step-down interleaved DC-DC converter with an extremely extended duty cycle based on the series capacitor and coupled-inductor techniques. The proposed converter utilizes a three-winding coupled inductor (TWCI) to enhance the step-down conversion ratio. In contrast to conventional coupled inductor-based step-down converters, its voltage gain improves as the turn ratio approaches unity. Consequently, coupled inductors have significantly lower winding losses. Furthermore, there is no extra constraint on the turn ratio of the TWCI. It results in a highly flexible voltage gain and more design freedom. Other advantages of the employed series capacitor and coupled inductor techniques can be listed as, zero voltage switching (ZVS) condition for all switches, significant reduction of the total switching device power (SDP) and recovery of the energy of leakage inductors. They all reduce power losses and costs. Steady-state analysis, derivation of voltage gain and design considerations are discussed in detail. Finally, a 200 W, 400-to-12 V experimental prototype is implemented to verify the effectiveness and feasibility of the proposed converter.
published_date 2024-06-18T09:35:19Z
_version_ 1802277873652858880
score 11.012678

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