Dual Series-Resonant Active-Clamp Converter

Lee, Jong-Jae; Kwon, Jung-Min; Kim, Eung-Ho; Kwon, Bong-Hwan

doi:10.1109/tie.2007.911912

Cited by 81 publications

(30 citation statements)

References 21 publications

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“…With these parameters, the maximum output current is determined as I o = 20.8 A. f r is designed such that f s /[2(1 ˗ D)] ≤ f r < f s /(2D). From the voltage gain given by Equation (27) and considering the dead time, the duty cycle D = 0.45 is Thus, C b = 1 μF is designed in the experimental circuit. The dead time of switches S 1 /S 3 and S 2 /S 4 is selected as 300 ns in the experimental circuit according to Equations (8) and (20).…”

Section: Resultsmentioning

confidence: 99%

Asymmetrical Pulse-Width-Modulated Full-Bridge Secondary Dual Resonance DC-DC Converter

Chen¹,

Zhou²,

Xu³

et al. 2014

Journal of Power Electronics

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A full-bridge secondary dual-resonant DC-DC converter using the asymmetrical pulse-width modulated (APWM) strategy is proposed in this paper. The proposed converter achieves zero-voltage switching for the power switches and zero-current switching for the rectifier diodes in the whole load range without the help of any auxiliary circuit. Given the use of the APWM strategy, a circulating current that exists in a traditional phase-shift full-bridge converter is eliminated. The voltage stress of secondary rectifier diodes in the proposed converter is also clamped to the output voltage. Thus, the existing voltage oscillation of diodes in traditional PSFB converters is eliminated. This paper presents the circuit configuration of the proposed converter and analyzes its operating principle. Experimental results of a 1 kW 385 V/48 V prototype are presented to verify the analysis results of the proposed converter.

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Section: Resultsmentioning

confidence: 99%

Asymmetrical Pulse-Width-Modulated Full-Bridge Secondary Dual Resonance DC-DC Converter

Chen¹,

Zhou²,

Xu³

et al. 2014

Journal of Power Electronics

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“…Based on those considerations, some resonant converters have been proposed [20]- [22]. However, some disadvantages prevent their popularity.…”

Section: Introductionmentioning

confidence: 99%

“…However, some disadvantages prevent their popularity. Even the dual resonant circuit applications in [20], [21] produce a double output voltage, and two windings are required for the transformer which results in design complexity and a bottleneck for power density. The authors of [22] provide an ingenious method to achieve a high step-up through a resonant circuit.…”

Section: Introductionmentioning

confidence: 99%

High Step-up Active-Clamp Converter with an Input Current Doubler and a Symmetrical Switched-Capacitor Circuit

He¹,

Zeng²,

Li³

et al. 2015

Journal of Power Electronics

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A high step-up dc-dc converter is proposed for photovoltaic power systems in this paper. The proposed converter consists of an input current doubler, a symmetrical switched-capacitor doubler and an active-clamp circuit. The input current doubler minimizes the input current ripple. The symmetrical switched-capacitor doubler is composed of two symmetrical quasi-resonant switched-capacitor circuits, which share the leakage inductance of the transformer as a resonant inductor. The rectifier diodes (switched-capacitor circuit) are turned off at the zero current switching (ZCS) condition, so that the reverse-recovery problem of the diodes is removed. In addition, the symmetrical structure results in an output voltage ripple reduction because the voltage ripples of the charge/pump capacitors cancel each other out. Meanwhile, the voltage stress of the rectifier diodes is clamped at half of the output voltage. In addition, the active-clamp circuit clamps the voltage surges of the switches and recycles the energy of the transformer leakage inductance. Furthermore, pulse-width modulation plus phase angle shift (PPAS) is employed to control the output voltage. The operation principle of the converter is analyzed and experimental results obtained from a 400W prototype are presented to validate the performance of the proposed converter.

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“…Lots of efforts have been made to develop high step-up DC-DC converters with a high efficiency [2]- [6]. Among the investigated topologies, the active-clamped step-up DC-DC converters in [4]- [6] are gaining its popularity, thanks to its high step-up ratio and soft-switching operation.…”

Section: Introductionmentioning

confidence: 99%

High efficiency step-up DC-DC converter for low-DC renewable energy sources

Choi

Yoo

Choi

et al. 2012

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion

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This paper presents a high efficiency step-up DC-DC converter for low-DC renewable energy sources. The proposed DC-DC converter is controlled by asymmetrical pulse width modulation(APWM) technique and achieves Zero-current switching(ZCS) of all output diodes. Compared to the previous DC-DC converters, the voltage stresses of the semiconductor devices can be reduced in the proposed converter. Experimental results are obtained from a 200 W output power. The proposed DC-DC converter achieves a high efficiency of 97.5 % at the rated load. Index Terms-DC-DC converter, soft-switching, high voltage gain, zero-current switching(ZCS).

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Dual Series-Resonant Active-Clamp Converter

Cited by 81 publications

References 21 publications

Asymmetrical Pulse-Width-Modulated Full-Bridge Secondary Dual Resonance DC-DC Converter

Asymmetrical Pulse-Width-Modulated Full-Bridge Secondary Dual Resonance DC-DC Converter

High Step-up Active-Clamp Converter with an Input Current Doubler and a Symmetrical Switched-Capacitor Circuit

High efficiency step-up DC-DC converter for low-DC renewable energy sources

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