A Bidirectional Two-Switch Flyback Converter With Cross-Coupled LCD Snubbers for Minimizing Circulating Current

Mukhtar, Nurhakimah Mohd; Lu, Dylan Dah-Chuan

doi:10.1109/tie.2018.2873097

Cited by 36 publications

(15 citation statements)

References 34 publications

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“…Moreover, the basis of this topology, the flyback converter increases ripple currents [30]. In [31], an isolated bidirectional DC-DC converter with two integrated non-dissipative inductor-capacitor-diode (LCD) snubbers is presented. This topology combines the inductance circuit in energy recovery [32][33][34] with a transformer to enhance power density.…”

Section: Dc-dc Convertermentioning

confidence: 99%

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Design of a High Efficiency High Step-Up/Step-Down Bidirectional Isolated DC–DC Converter

Lin

2021

Processes

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This paper presents a novel bidirectional DC–DC converter, equipped with a three-winding coupled inductor, that can be applied to high-voltage, bidirectional DC–DC energy conversion and meet battery charging and discharging requirements. The architecture consists of a semi-Z-source converter and a forward–flyback converter featuring a three-winding coupled inductor with an iron core. This proposed topology retains the current continuity characteristics of the low-voltage side, all switches possess the zero-voltage switching feature, and the switches on the low-voltage side in the step-down mode have a synchronous rectification function. A 500-W bidirectional converter is implemented to examine the practicality and feasibility of the proposed topology. The relatively streamlined design of the converter can greatly reduce production costs. In the step-up and step-down modes, the maximum energy conversion efficiencies are 95.74% and 96.13%, respectively.

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Section: Dc-dc Convertermentioning

confidence: 99%

“…and 𝑖 𝐿𝑚1,𝑎𝑣𝑔 = 𝑖 𝐿 (33) When the magnetic components are operated in BCM mode, current iLm1,min is equal to zero. Substituting Equations ( 32) and (33) into Equation (31), current iL1,min can be obtained as…”

Section: Design Of the Magnetic Componentsmentioning

confidence: 99%

Design of a High Efficiency High Step-Up/Step-Down Bidirectional Isolated DC–DC Converter

Lin

2021

Processes

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“…In a system working on a battery, a high-step-up converter that transfers energy from the battery to the DC bus is necessary due to the large voltage difference between the battery and DC bus. Recently, many studies have investigated bidirectional converters [13][14][15][16][17][18][19][20][21][22], a topology that can operate both step-up and step-down functions, which further reduces the number of components, cost, and size of the system. In a nonisolated bidirectional DC/DC converter with ZVS technology [13], ZVS is achieved using synchronous rectification technology and a clamping circuit, but the converter does not apply galvanic isolation.…”

Section: Introductionmentioning

confidence: 99%

Novel High-Step-Up/Step-Down Three-Port Bidirectional DC/DC Converter for Photovoltaic Systems

2022

Energies

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This paper presents a novel three-port high-step-up/step-down bidirectional DC/DC converter with a coupled inductor for photovoltaic (PV) systems. The proposed converter combines a high-step-up converter, which is used to step-up the PV module to DC bus 200 V, and a battery charge/discharge bidirectional converter to form a three-port bidirectional converter. When sufficient energy is supplied from the PV modules, the converter can step-up the output of the PV modules and provide energy to the DC bus while charging the battery simultaneously. However, when no energy is supplied from the PV modules, the DC bus voltage is provided by the battery. Moreover, the energy stored in the leakage inductor is recycled to the DC-blocking capacitor, and synchronous rectification is conducted in the switch during the step-up mode to reduce switch loss and thereby increase the system’s overall efficiency. Finally, a 500 W three-port bidirectional converter is implemented to verify the feasibility and practicability of the proposed converter. The maximum efficiency of the proposed converter is 95.4%, 94.3%, and 94.7% when operated in the high-step-up mode, battery step-up mode, and step-down mode for the PV modules, respectively.

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“…Thus, the use of damping circuits is required, raising costs and decreasing efficiency. Furthermore, a high‐gain ratio subjects the output diode to high voltage peaks during commutations [14].…”

Section: Introductionmentioning

confidence: 99%

Quadratic‐boost‐double‐flyback converter

Guepfrih

Waltrich

Lazzarin

2019

IET Power Electronics

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Combining low-voltage power sources with loads that require high-voltage levels is a challenge, especially for power devices above 500 W. In this context, this study presents a new dc-dc high-gain converter using coupled inductors. The new converter uses only one switch and output capacitors with low values. It also allows the use of energy from the leakage inductors and enables the input current to operate in the continuous mode. The experimental concept validation was carried out in a prototype of 1 kW with an input voltage between 48 and 96 V and an output voltage of 800 V. The results obtained were coherent, with no significant semiconductor over-voltage and high efficiency was achieved for a wide power range.

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A Bidirectional Two-Switch Flyback Converter With Cross-Coupled LCD Snubbers for Minimizing Circulating Current

Cited by 36 publications

References 34 publications

Design of a High Efficiency High Step-Up/Step-Down Bidirectional Isolated DC–DC Converter

Design of a High Efficiency High Step-Up/Step-Down Bidirectional Isolated DC–DC Converter

Novel High-Step-Up/Step-Down Three-Port Bidirectional DC/DC Converter for Photovoltaic Systems

Quadratic‐boost‐double‐flyback converter

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