A New ZVT Quadratic High Step‐Up Nonisolated DC‐DC Converter

This paper introduces a quadratic DC‐DC converter that operates with zero‐voltage transition. In this converter, the combination of integrated coupled inductor technique and diode–capacitor technique is employed to boost static gain and decrease voltage stress on the main switch. Moreover, with the...

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Published inJournal of Engineering Vol. 2025; no. 1
Main Authors Abdollahi, Alireza, Delshad, Majid, Sadeghi, Ramtin
Format Journal Article
LanguageEnglish
Published Cairo John Wiley & Sons, Inc 01.01.2025
Wiley
Subjects
Capacitors
Circuits
Diodes
Efficiency
Electric current converters
Energy
Inductance
Inductors
Leakage
Power management
Snubbers
Voltage converters (DC to DC)
Voltage gain
Online AccessGet full text
ISSN2314-4904
2314-4912
2314-4912
DOI10.1155/je/5145061

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Abstract This paper introduces a quadratic DC‐DC converter that operates with zero‐voltage transition. In this converter, the combination of integrated coupled inductor technique and diode–capacitor technique is employed to boost static gain and decrease voltage stress on the main switch. Moreover, with the help of a third winding wound on the main ferrite core and an auxiliary switch and diode, zero voltage transitions are provided for the main switch in a wide range of load variations. Furthermore, the auxiliary circuit in the converter exhibits a short conduction duration, resulting in negligible conduction losses due to the minimal circulating current. Additionally, both the auxiliary switch and diode achieve zero‐current switching (ZCS), effectively eliminating switching loss. Moreover, the diode operates without reverse recovery issues, preventing any significant loss in the converter. These features have made it possible to design a converter with high voltage gain, high efficiency, and high power density. The fundamental operational principles of the converter are comprehensively elucidated, and an in‐depth analytical assessment of its steady‐state performance is conducted. In conclusion, a 200 W prototype has been implemented to validate the converter’s performance.
AbstractList [...]nonisolated converters are more apt for low-power applications due to their inherent characteristics [3]. [...]the energy stored in the leakage inductance is released through the power switch, which raises the voltage spike. [...]to capture the mentioned energy in these converters, the use of clamp circuits or lossless snubbers is necessary. A primary concern with high step-up converters is switching losses and the voltage surges on the power switches resulting from the transformer’s leakage inductance. [...]different soft-switching techniques are introduced, which absorb the energy from the leakage inductors and facilitate soft-switching operation across all switching devices [22–25]. Voltage Gain By neglecting the leakage inductances, the calculation of the voltage gain can be performed by applying the volt-second balance to L1 and Lm in continuous conduction mode (CCM). Since Modes 3, 4, and 6 are transition periods and too short, only Modes 1, 2, 5, and 7 are considered for steady-state analysis.
This paper introduces a quadratic DC-DC converter that operates with zero-voltage transition. In this converter, the combination of integrated coupled inductor technique and diode–capacitor technique is employed to boost static gain and decrease voltage stress on the main switch. Moreover, with the help of a third winding wound on the main ferrite core and an auxiliary switch and diode, zero voltage transitions are provided for the main switch in a wide range of load variations. Furthermore, the auxiliary circuit in the converter exhibits a short conduction duration, resulting in negligible conduction losses due to the minimal circulating current. Additionally, both the auxiliary switch and diode achieve zero-current switching (ZCS), effectively eliminating switching loss. Moreover, the diode operates without reverse recovery issues, preventing any significant loss in the converter. These features have made it possible to design a converter with high voltage gain, high efficiency, and high power density. The fundamental operational principles of the converter are comprehensively elucidated, and an in-depth analytical assessment of its steady-state performance is conducted. In conclusion, a 200 W prototype has been implemented to validate the converter’s performance.
This paper introduces a quadratic DC-DC converter that operates with zero-voltage transition. In this converter, the combination of integrated coupled inductor technique and diode-capacitor technique is employed to boost static gain and decrease voltage stress on the main switch. Moreover, with the help of a third winding wound on the main ferrite core and an auxiliary switch and diode, zero voltage transitions are provided for the main switch in a wide range of load variations. Furthermore, the auxiliary circuit in the converter exhibits a short conduction duration, resulting in negligible conduction losses due to the minimal circulating current. Additionally, both the auxiliary switch and diode achieve zero-current switching (ZCS), effectively eliminating switching loss. Moreover, the diode operates without reverse recovery issues, preventing any significant loss in the converter. These features have made it possible to design a converter with high voltage gain, high efficiency, and high power density. The fundamental operational principles of the converter are comprehensively elucidated, and an in-depth analytical assessment of its steady-state performance is conducted. In conclusion, a 200W prototype has been implemented to validate the converter's performance.
Audience Academic
Author Delshad, Majid
Abdollahi, Alireza
Sadeghi, Ramtin
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Copyright COPYRIGHT 2025 John Wiley & Sons, Inc.
Copyright © 2025 Alireza Abdollahi et al. Journal of Engineering published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License (the “License”), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. https://creativecommons.org/licenses/by/4.0
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Snippet This paper introduces a quadratic DC‐DC converter that operates with zero‐voltage transition. In this converter, the combination of integrated coupled inductor...
This paper introduces a quadratic DC-DC converter that operates with zero-voltage transition. In this converter, the combination of integrated coupled inductor...
[...]nonisolated converters are more apt for low-power applications due to their inherent characteristics [3]. [...]the energy stored in the leakage inductance...
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SubjectTerms Capacitors
Circuits
Diodes
Efficiency
Electric current converters
Energy
Inductance
Inductors
Leakage
Power management
Snubbers
Voltage converters (DC to DC)
Voltage gain
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Title A New ZVT Quadratic High Step‐Up Nonisolated DC‐DC Converter
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