Analysis of novel phase-shifted full-bridge converters with wide ZVS range reduced filter requirement

Cai, Jiahui; Zhao, Lei; Wei, Chuliang; Liang, Jinghua

doi:10.1587/elex.18.20210391

Cited by 5 publications

(1 citation statement)

References 32 publications

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“…Consequently, two-stage power converters are increasingly utilized in the EPC. There are two types of topologies that have become dominant applications: boost and full-bridge [13], and buck and phase-shifted full-bridge [14]. In boost and full-bridge topologies, the control loop response time is very slow, and the surge current is high [15].…”

Section: Introductionmentioning

confidence: 99%

A Two-Stage DC/DC Isolated High-Voltage Converter with Zero-Voltage Switching and Zero-Current Switching Applied in Electronic Power Conditioners

Zheng

Zhao

et al. 2022

Energies

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This paper presents a two-stage DC/DC converter with high efficiency utilized in an electronic power conditioner (EPC), which is widely applicable in satellite communications, etc. The galvanically isolated converter contains two cascaded converters: a buck converter, which is a pre-regulator operating under a closed-loop condition, and a push–pull converter, which is intended to boost the input voltage, operating under an open-loop condition. In the push–pull converter, the power switches, including the main switches and the rectifier diodes, operate under zero-voltage switching (ZVS) and zero-current switching (ZCS) at both switch off and switch on, which minimizes the switching loss. Furthermore, all of the parasitic parameters, such as the parasitic capacitance, leakage inductance, and magnetizing inductance of the main transformer, are fully utilized. Therefore, the presented topology benefits from fewer semiconductors but higher efficiency. The proposed topology produces less EMI noise because of ZVS and ZCS processes whose fundamental switching frequency interference is relatively low. The presented converter achieves a wide bus voltage regulation range in a satellite because of the pre-regulation of the buck cell. The theoretical analysis is validated by a prototype and its experimental results. The maximum efficiency of the converter can be up to 94.5%, and the high-voltage output is 7000 V.

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Section: Introductionmentioning

confidence: 99%

A Two-Stage DC/DC Isolated High-Voltage Converter with Zero-Voltage Switching and Zero-Current Switching Applied in Electronic Power Conditioners

Zheng

Zhao

et al. 2022

Energies

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A Wide Range Zero‐Voltage Switching Phase‐Shifted Full‐Bridge Converter With No Duty Cycle Loss and Low Rectifier Oscillation

Tang,

Zhao,

Jia

et al. 2024

Circuit Theory & Apps

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The phase‐shifted full‐bridge (PSFB) converter has been widely used in DC/DC converters due to its soft‐switching characteristics. However, it still has many drawbacks. In order to solve the shortcomings of the PSFB converter, such as limited soft‐switching range, high loss of duty cycle, and high oscillating voltage of the secondary rectifier, a PSFB converter based on parallel variable inductor and series blocking capacitor is proposed in this study. A wide range of soft switching, low rectifier oscillation voltage, and no duty cycle loss can be realized by the auxiliary current‐controlled variable inductor and reasonable blocking capacitor design. In this study, the mechanism of soft switching and suppression of oscillation is discussed and some of the designs are given. Finally, the experimental results of a 200 W/50 kHz prototype are constructed in the laboratory to verify the feasibility and effectiveness of the proposed converter.

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Comparative study of the effects of HFT(PCB) parasitics on single-ended forward DC/DC converters

Ba,

Lyu,

Wang

et al. 2024

IEICE Electron. Express

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This study investigates the influence of parasitic parameters in high-frequency PCB transformers (HFT(PCB)) on the performance of single-ended resonant aerospace DC/DC converters. An interleaved winding high-frequency PCB transformer, IW-HFT(PCB), was designed and compared with conventional HFT(PCB) in terms of power MOSFET voltage stress, output efficiency, and transformer operating temperature. A 100W aerospace DC/DC converter prototype was developed for validation, demonstrating significant improvements in current density distribution, magnetic field uniformity, reduction of leakage inductance, and thermal management with IW-HFT(PCB). The IW-HFT(PCB) design increased the maximum DC/DC output efficiency by 1.35% and full-load output efficiency by 1.33%. Moreover, peak voltage stress on power MOSFETs was reduced by up to 51.35%, while transformer temperature decreased by 3.9 degrees Celsius.

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Analysis of novel phase-shifted full-bridge converters with wide ZVS range reduced filter requirement

Cited by 5 publications

References 32 publications

A Two-Stage DC/DC Isolated High-Voltage Converter with Zero-Voltage Switching and Zero-Current Switching Applied in Electronic Power Conditioners

A Two-Stage DC/DC Isolated High-Voltage Converter with Zero-Voltage Switching and Zero-Current Switching Applied in Electronic Power Conditioners

A Wide Range Zero‐Voltage Switching Phase‐Shifted Full‐Bridge Converter With No Duty Cycle Loss and Low Rectifier Oscillation

Comparative study of the effects of HFT(PCB) parasitics on single-ended forward DC/DC converters

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