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 4 publications

(1 citation statement)

References 32 publications

(31 reference statements)

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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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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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Current observer-based critical conduction mode control of a bidirectional DC–DC converter in battery charging/discharging applications

Dai

Zhang

et al. 2023

Front. Energy Res.

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A current observer-based digital critical conduction mode control of a bidirectional DC–DC converter with full-range soft switching for battery charging/discharging applications is proposed in this paper. Under the proposed control method, the bidirectional DC/DC converter operates in the critical continuous mode (CRM), the full-range zero-voltage switching (ZVS) can be achieved, and the inductor current ripple can be optimized. The CRM control is achieved by the proposed current observer, and the zero-crossing detection (ZCD) analog circuit or current sampling circuit can be eliminated. Therefore, compared with existing methods, the design complexity of the hardware circuit can be simplified. In addition, the proposed current observer can estimate the inductor current over a wide range of load and voltage variations. Therefore, the proposed control method can be applied to a wide range of charging and discharging applications. Finally, a prototype with 30–60 V input voltage, 24 V output voltage, and 75–150 kHz switching frequency is built. The experimental data and waveforms prove the correctness and advantages of the solutions proposed in this paper.

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

Cited by 4 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

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

Current observer-based critical conduction mode control of a bidirectional DC–DC converter in battery charging/discharging applications

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