Forward-flyback resonant converter for high-efficient medium-power photovoltaic applications

Montes, Oscar Andrés; Son, Sungho; Kim, Sooa; Seok, Hwasoo; Lee, Jin S.; Kim, Min Soo

doi:10.1109/apec.2017.7930851

Cited by 13 publications

(5 citation statements)

References 17 publications

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“…The hybrid forward-flyback topology has the capability to provide the required energy to the load by utilising a transformer, irrespective of the operational state of the primary switch. As a result, it can supply the load with more power than any other single-switch power system [56]. This topology offers several advantages, including a smaller component count, soft switching, as well excellent efficiency.…”

Section: Forward Converter Topologiesmentioning

confidence: 99%

“…Many studies have been conducted on the converter control methods and on some of the changes to the topologies of the converter [57]. In [56], an isolated quasi-resonant forward-flyback converter is introduced in a PV system. In this proposed topology, there is a series connection between the outputs of the forward-flyback converter, which results in high step-up conversion.…”

Section: Forward Converter Topologiesmentioning

confidence: 99%

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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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Section: Forward Converter Topologiesmentioning

confidence: 99%

Section: Forward Converter Topologiesmentioning

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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“…Therefore, the small signal variables have been added to these parameters. Six small signal equations can be listed ((20)- (25)). The small signal ((26)-(31)) can be deduced from the linearisation of (20)- (25).…”

Section: And Ac Equivalent Circuitsmentioning

confidence: 99%

“…Six small signal equations can be listed ((20)- (25)). The small signal ((26)-(31)) can be deduced from the linearisation of (20)- (25). From the following equations, a circuit can be obtained which its schematic is presented in Fig.…”

Section: And Ac Equivalent Circuitsmentioning

confidence: 99%

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Design, modelling, and implementation of a modified double‐switch flyback‐forward converter for low power applications

Eshkevari¹,

Mosallanejad

Sepasian

2019

IET Power Electronics

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This study proposes a modified double-switch flyback-forward (DSFF) converter for low-power applications with a reduced number of windings in its transformer. This circuit has resulted from the combination of the two-switch flyback and twoswitch forward converters. It includes a simple transformer with one set of secondary side windings, and it is not necessary to design two separate sets of windings for the desired output voltage which is the main problem of other flyback-forward converters. An auxiliary winding has been designed for self-biasing, and consequently, it improves the overall efficiency in the no-load condition. Due to the modifications on the previously presented two-switch flyback-forward converter, the circuit model has changed. This study, first, analyses the operation of the proposed converter in detail, then it explains a method to design this converter in continuous inductor current mode. Also, a start-up voltage regulator circuit and a modified bootstrap gate driver will be investigated, and the DC and AC model of the converter will be presented. Experimental results validate the proposed DSFF converter. The tested circuit includes a DSFF converter, a pulse generator circuit, a start-up voltage regulator, and a modified bootstrap gate driver.

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A novel and simple hybrid DC-DC converter of resonant forward and PWM flyback

Peng

Jin

et al. 2018

2018 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Forward-flyback resonant converter for high-efficient medium-power photovoltaic applications

Cited by 13 publications

References 17 publications

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

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

Design, modelling, and implementation of a modified double‐switch flyback‐forward converter for low power applications

A novel and simple hybrid DC-DC converter of resonant forward and PWM flyback

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