A High Step-Up Nonisolated DC-DC Converter With Flexible Voltage Gain

In this article, a high step-up nonisolated dc-dc converter is proposed to provide high voltage gain with low voltage stress on semiconductors. The main feature of the proposed structure is its flexibility in providing constant output voltages with a reasonable range of voltage stress. This flexibil...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2020-10, Vol.35 (10), p.10489-10500
Main Authors: Marzang, Vafa, Hosseini, Seyed Hossein, Rostami, Naghi, Alavi, Peyman, Mohseni, Parham, Hashemzadeh, Seyed Majid
Format: Article
Language:English
Subjects:
Active switched inductor (A-SL)
Boundary conditions
Capacitors
Converters
Equivalent circuits
Flexibility
high step-up converter
High-voltage techniques
Inductors
Low voltage
Mathematical analysis
nonisolated dc–dc converters
Semiconductors
Stress
switched capacitor (SC) cell
Switches
Voltage gain
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Description
Summary:In this article, a high step-up nonisolated dc-dc converter is proposed to provide high voltage gain with low voltage stress on semiconductors. The main feature of the proposed structure is its flexibility in providing constant output voltages with a reasonable range of voltage stress. This flexibility of the voltage gain is achieved by different combinations of duty cycles. Also, this feature improves the efficiency of the proposed converter. The structure consists of three switches, two inductors, three capacitors, and four diodes. In this article, descriptions of continuous conduction mode, discontinuous conduction mode, boundary condition mode, nonideal model, and control method are presented. Comparisons between the proposed converter and other related structures show that in this converter, the voltage gain is improved and semiconductors voltage stresses are reduced. In order to verify the mathematical analysis, a 500-W laboratory prototype of the proposed converter is built and its experimental results are investigated completely.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2020.2976829