A new phase-shifted full-bridge converter with maximum duty operation for server power system

Cho, Inho; Cho, Kyu-Min; Kim, Jong-Woo

doi:10.1109/icpe.2011.5944715

Cited by 14 publications

(16 citation statements)

References 11 publications

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“…B) Extra transistor Q 3 The ZVS condition of the extra transistor Q 3 is determined by the energy of leakage inductance. It can be expressed as,…”

Section: Soft-switching Conditionmentioning

confidence: 99%

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A New Zero-Voltage-Switching Push-Pull Converter

Yang¹,

Wu²

2013

EPE

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A soft switching three-transistor push-pull（TTPP）converter is proposed in this paper. The 3rd transistor is inserted in the primary side of a traditional push-pull converter. Two primitive transistors can achieve zero-voltage-switching (ZVS) easily under a wide load range, the 3rd transistor can also realize zero-voltage-switching assisted by leakage inductance. The rated voltage of the 3rd transistor is half of that of the main transistors. The operation theory is explained in detail. The soft-switching realization conditions are derived. An 800 W with 83.3 kHz switching frequency prototype has been built. The experimental result is provided to verify the analysis.

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“…B) Extra transistor Q 3 The ZVS condition of the extra transistor Q 3 is determined by the energy of leakage inductance. It can be expressed as,…”

Section: Soft-switching Conditionmentioning

confidence: 99%

“…Over the last two decades, the most researches focus on the improved ZVS and ZVZCS phase-shifted full-bridge circuit [1][2][3][4][5][6] and their applications. But comparatively, the research on soft switching push-pull converter is very seldom.…”

Section: Introductionmentioning

confidence: 99%

A New Zero-Voltage-Switching Push-Pull Converter

Yang¹,

Wu²

2013

EPE

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“…Given the resonance between transformer leakage inductance and parasitic junction capacitance of a rectifier diode, serious voltage spikes across the diode rectifier are generated [3], which increases the diode voltage rating and causes electromagnetic interference problems. Excessive circulating current in the primary side during the freewheeling interval also increases the primary side conduction and turn-off switching losses of the lagging-leg switches [4]- [6]. From the corresponding waveforms of a traditional PSFB converter shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…In order to extend the ZVS range and eliminate voltage spike of diode rectifier, additional auxiliary circuits are required [2], [4]- [6], [8]- [11], [14], which increase complexity of the converter and cause additional conduction losses.…”

Section: Introductionmentioning

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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“…A number of research papers have been published in literature to improve the range of ZVS operation for converter [3][4][5][6]. The range of ZVS can be extended by increasing stored energy of inductance using high leakage inductance of transformer or adding series inductance.…”

Section: Introductionmentioning

confidence: 99%

A novel ZVS full-bridge converter

Nasir

Cobb

2016

2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC)

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Abstract-Conventional soft switching techniques are promising for improvement of efficiency in full bridge converters. However, efficiency of converters with employing such techniques is restricted due to narrow range of zero voltage switching (ZVS). In such situation, several methods have been proposed in the literature to cope with wide range of ZVS from no load to maximum load. The extra circuitry added to achieve a wide range of ZVS generates more conduction losses in a converter and increase cost of converter. In this paper, a novel ZVS full bridge converter is proposed to eliminate limitations of narrow range ZVS, improved efficiency and reduced cost. The circuit diagram, operation principle of proposed converter is explained and analyzed theoretically in detail. In addition, the proposed converter is built and experimental results are provided to verify the novel ZVS full bridge converter.

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A new phase-shifted full-bridge converter with maximum duty operation for server power system

Cited by 14 publications

References 11 publications

A New Zero-Voltage-Switching Push-Pull Converter

A New Zero-Voltage-Switching Push-Pull Converter

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

A novel ZVS full-bridge converter

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