A high gain high efficiency and compact isolated sepic DC-DC converter

Lodh, Tirthasarathi; Majumder, Tanmoy

doi:10.1109/scopes.2016.7955691

Cited by 10 publications

(2 citation statements)

References 20 publications

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“…With the rapid spread of renewable energy, smart grids, and electric vehicles, power electronics play the predominant role in their implementation within electric power systems [1]- [3]. Highly efficient converters especially isolated DC-DC converters are widely used for renewable energy integration, micro-grids, and electric vehicles [4]. There is a great concern in system operating efficiency by upgrading power converters; increasing their efficiency, reducing power losses including switching losses, which occur by reducing number of semi-conductor devices, and do the accurate control [5].…”

Section: Introductionmentioning

confidence: 99%

A novel step-up/step-down DC-DC converter based on flyback and SEPIC topologies with improved voltage gain

Mahafzah

Rababah

2023

IJPEDS

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A novel step-up/step-down DC-DC converter with improved voltage gain characteristics is suggested in this paper. The proposed converter combines flyback and single-ended primary inductance converter (SEPIC) converters. The voltage control loop design is simplified due to the use of only a single controlled switch. It has been discussed how switch duty cycle affects voltage gain. This relationship demonstrates that the proposed converter voltage gain is improved compared with flyback and SEPIC converters. However, compared to flyback and SEPIC converters, it has a higher voltage gain at any given duty cycle. The proposed converter operation is thoroughly discussed, the associated equations are derived, and its parameters are expertly designed. Moreover, it is designed to supply a DC load of 2.5 kW, 500 V, and 5 A. The proposed converter efficiency exceeds 84% under rated load conditions. Additionally, it is also presented as an adapter for electric vehicles. The waveforms associated with the simulation of the converter across the universal line voltage of 110-260 Vrms are shown. At both line voltages, the total harmonics distortions (THDs) of the line current are 17.12% and 27.26%, respectively. MATLAB/Simulink is utilized for validation in order to validate the topology for different applications.

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Section: Introductionmentioning

confidence: 99%

A novel step-up/step-down DC-DC converter based on flyback and SEPIC topologies with improved voltage gain

Mahafzah

Rababah

2023

IJPEDS

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“…The high voltage gain is achieved by employing a voltage‐doubler rectifier and a switched‐capacitor technique. In [10], an isolated high‐step‐up SEPIC is proposed. This isolated version was obtained by using two flyback transformers in place of the two inductors used in a conventional SEPIC converter.…”

Section: Introductionmentioning

confidence: 99%

High‐gain three‐phase current‐fed push–pull DC–DC converter

Costa¹,

Andersen²

2020

IET Power Electronics

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In this study, a new three-phase current-fed push-pull DC-DC converter with high-gain capability was proposed. The proposed circuit has the advantages of three-phase converters and the push-pull converter circuit, with small volume and a simplified gate drive circuit with switches connected to the same reference. The converter was analysed for operation in continuous and discontinuous conduction modes. The analysis includes a description of the topological stage, theoretical waveforms, deduction of the voltage gains and the expressions for its practical design. To validate the theoretical analysis, a 700 W prototype was built and tested with an input voltage of 40 V, an output voltage of 400 V and a switching frequency of 40 kHz. Despite using a unity transformer turns ratio, the prototype had an experimental gain of ∼10, which makes the proposed converter suitable for applications as renewable energy sources systems.

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