A New High Voltage Gain Active Switched-Inductor Based High Step-Up DC–DC Converter With Coupled-Inductor

Imanlou, Arash; Najmi, Ebrahim Seifi; Behkam, Reza; Nazari-Heris, Morteza; Gharehpetian, Gevork B.

doi:10.1109/access.2023.3283471

Cited by 23 publications

(2 citation statements)

References 46 publications

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“…The circuit studied in this article adds a tapped inductor [4,17,[19][20][21] to the course. This connection method can change the inductance at both ends of the inductor by moving the position of the point of the tap on the inductor.…”

Section: Introduction 1backgroundsmentioning

confidence: 99%

Analysis, Design and Effectuation of a Tapped Inductor Current Converter with Fractional Output for Current Source Systems

Mei,

Cheng,

Hua

2024

Energies

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This article proposes a new connection method of tapped inductors that works in the current source, which enables the current-mode power converter circuit to have a new topological relationship. Usually, in a switched-inductor circuit, a stable output multiple is obtained through the connection of the inductor and the switching devices. This is because the tapped point on the inductor varies, and the magnetomotive force (mmf) of inductance is adjusted. Thereby, the output current is controlled by the states of switching devices within a certain range. This optimized circuit structure can adjust the output current according to load changes in practical applications without changing the input power supply. The proposed method has been verified for its feasibility through detailed analysis and hardware work. The principal analysis based on the flux linkage and the PSIM simulation confirms that the theoretical circuit can be implemented. Finally, a hardware circuit is built to obtain real and feasible conclusions, and it is verified that the circuit can achieve a stable output and variable current within a specific range. The proposed work presents an alternative power conversion methodology using the active switching of mmf, and it is a stable and simple power conversion technique.

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Section: Introduction 1backgroundsmentioning

confidence: 99%

Analysis, Design and Effectuation of a Tapped Inductor Current Converter with Fractional Output for Current Source Systems

Mei,

Cheng,

Hua

2024

Energies

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“…In recent years, various non-isolated topologies for high step-up voltage gain have been developed. Techniques such as Interleave Boost (IB), Coupled Inductor (CI), Switched Capacitor (SC), Cascaded Boost (CB), Switched Inductor (SI), and Voltage Multiplier (VM) [4][5][6][7][8][9] have been employed to achieve a high voltage gain by appropriately adjusting the duty ratio. Nevertheless, these methods may suffer from inefficiencies caused by the need for an extensive amount of circuit components, and they may not meet the requirements for galvanic isolation [10].…”

Section: Introductionmentioning

confidence: 99%

Topologies and Design Characteristics of Isolated High Step-Up DC–DC Converters for Photovoltaic Systems

Meshael,

Elkhateb,

Best

2023

Electronics

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This paper aims to investigate the state-of-the-art isolated high-step-up DC–DC topologies developed for photovoltaic (PV) systems. This study categorises the topologies into transformer-based and coupled inductor-based converters, as well as compares them in terms of various parameters such as component count, cost, voltage conversion ratio, efficiency, voltage stress, input current ripple, switching mode, and power rating. The majority of the topologies examined exhibit peak efficiencies of 90% to 97%, with voltage conversions in excess of eight, as well as power ratings ranging from 100 W to 2 kW. The existing literature has found that most isolated DC–DC converters increase their turn ratios in order to achieve high step-up ratios. As a result, voltage spikes have increased significantly in switches, resulting in a decrease in overall system efficiency. In this research, the use of passive and active snubbers to provide soft switching in isolated step-up DC–DC converters is investigated. Moreover, a comprehensive analysis of the three most widely used boost techniques is provided. A reduction in turn ratio and a decrease in voltage stress were the results of this process. The main purpose of this study is to provide a comprehensive overview of the most used high-boost isolated DC–DC topologies in PV systems, including flyback, isolated SEPIC, forward, push-pull, half- and full-bridge, and resonant converter, with a focus on the recent research in the field and the recent advancements in these topologies. This study aims to guide further research and analysis in selecting appropriately isolated topologies for PV systems.

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A New High Voltage Gain Common‐Ground Step‐Up DC‐DC Converter Integrating Coupled‐Inductors and Switched‐Capacitors

Imanlou,

Babaei,

Hosseini

2024

Circuit Theory & Apps

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This study proposes a new high‐voltage gain quadratic‐structured common‐ground step‐up DC‐DC converter, integrating coupled‐inductors and switched‐capacitors. This configuration achieves a significant voltage gain without necessitating either a substantial duty cycle or an elevated turn ratio in the coupled‐inductors. A critical innovation is the embedding of the secondary windings of the coupled‐inductors into the switched‐capacitor cell, which not only enhances voltage gain but also effectively suppresses the inrush current typical in such cells. The converter's features include the successful recycling of energy from the leakage inductors; low voltage stress exerted on power switches; zero‐current switching (ZCS) turn‐on of the main switch; ZCS conditions for the diodes' turn‐off; reduced switching losses because of the application of a quasi‐resonant (QR) operation between the leakage inductors and middle capacitors; simultaneous operation of the power switches; continuous input current; a wide duty cycle range; and a common‐ground output–input connection. The operating principle, steady‐state analysis (CCM and DCM), design considerations, efficiency calculation, small‐signal modeling with controller design, and comparisons with other related converters are provided. Finally, experimental results from a 100‐ to 300‐W prototype with 20‐ to 30‐V input and 400‐V output are given to validate the proposed converter's theoretical analysis and feasibility.

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A New High Voltage Gain Active Switched-Inductor Based High Step-Up DC–DC Converter With Coupled-Inductor

Cited by 23 publications

References 46 publications

Analysis, Design and Effectuation of a Tapped Inductor Current Converter with Fractional Output for Current Source Systems

Analysis, Design and Effectuation of a Tapped Inductor Current Converter with Fractional Output for Current Source Systems

Topologies and Design Characteristics of Isolated High Step-Up DC–DC Converters for Photovoltaic Systems

A New High Voltage Gain Common‐Ground Step‐Up DC‐DC Converter Integrating Coupled‐Inductors and Switched‐Capacitors

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