Paralleled Variable Inductor Phase-Shifted Full-Bridge Converter With Full-Load Range ZVS and Low Duty Cycle Loss

Gao, Yahu; Tang, Yu; Yao, Fang; Ge, Leijiao; Guo, Yingjun; Sun, Hexu

doi:10.1109/tie.2023.3277113

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…Moreover, since the dual full-bridge converter shares the leading-leg, it increases the current stress of the leading-leg and the dual control modes will make the system design more complicated, which reduces the reliability of the system. Article [27] presents a parallel variable inductor ZVS PSFB converter. The variable inductor is connected in parallel with the main transformer to realize the ZVS of the switching tube by utilizing the energy of the variable inductor under full load.…”

Section: Introductionmentioning

confidence: 99%

Novel Series-Parallel Phase-Shifted Full-Bridge Converters with Auxiliary LC Networks to Achieve Wide Lagging-Leg ZVS Range

Wang,

Sun,

Chen

et al. 2024

Electronics

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Under light load conditions, the phase-shifted full-bridge (PSFB) converter often has difficulty in realizing the zero-voltage switching (ZVS) of the lagging-leg by relying on the energy of its resonant inductor; however, for the series-parallel PSFB converter applied in high-power applications, the lagging-leg still has the problem of difficult realization of ZVS. Based on this, the paper analyzes the reasons why the series-parallel PSFB converter has difficulty in achieving ZVS for the lagging-leg under light and heavy loads. Under interleaved control, the ZVS of the lagging-leg over the full load range is realized by adding an auxiliary LC branch at the midpoint of the lagging-leg of both submodules. Based on the double-bridge input-parallel-output-series (IPOS) PSFB converter, analyzing the working principle of the circuit after adding the auxiliary LC branch and extending it to the series-parallel PSFB converter. The design requirements of the LC auxiliary branch of the dual-bridge series-parallel PSFB converter are given and the effects of the LC auxiliary branch on the module operating state and device stress are analyzed. On this basis, an extension is carried out to give the working principle and design method of the auxiliary LC branch of the N-bridge series-parallel PSFB converter. Finally, a 100 kW Matlab/Simulink simulation model verifies the superior performance of the proposed LC auxiliary branch to realize the lagging-leg ZVS of the series-parallel PSFB converter under light and heavy loads and achieves a 1.09% peak efficiency improvement at rated load.

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Section: Introductionmentioning

confidence: 99%

Novel Series-Parallel Phase-Shifted Full-Bridge Converters with Auxiliary LC Networks to Achieve Wide Lagging-Leg ZVS Range

Wang,

Sun,

Chen

et al. 2024

Electronics

View full text Add to dashboard Cite

show abstract

“…In addition, the circuit can also reduce duty cycle loss and conduction loss [27]. In [28], the saturable inductor is substituted with two diodes; thus, the reverse current of the primary side can be prevented. The power loss caused by conduction and duty cycle loss can also be reduced.…”

Section: Introductionmentioning

confidence: 99%

A New Zero-Voltage Zero-Current Switching Converter with Minimum Duty Cycle Loss

Wang,

Shi,

2024

Electronics

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Zero-voltage zero-current switching (ZVZCS) phase-shifted full-bridge (PSFB) converters have been widely used in high-power applications because of their high efficiency, low price, and easy control. Currently, the biggest problem with PSFB converters in operation is their high duty cycle loss. With the increase in current, duty cycle loss grows and degrades their performance. Focusing on this problem, a new ZVZCS PSFB converter is proposed in this paper. This topology adds an auxiliary circuit to minimize duty cycle loss. Moreover, the lagging-leg switches can obtain zero-current switching (ZCS) easily with the help of the circuit. The auxiliary circuit is built of four metal-oxide-semiconductor field-effect transistors (MOSFETs) and an auxiliary transformer, and extra voltage can be added to the primary coils when the direct-current (DC) voltage is small. This paper discusses its operation principles and characteristics, and an experiment of a 2 kW prototype was conducted, the results of which demonstrate the advantages of the presented circuits.

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Isolated bidirectional DC-DC Converter: A topological review

Alam,

Minai,

Bakhsh

2024

e-Prime - Advances in Electrical Engineering, Electronics and E

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Paralleled Variable Inductor Phase-Shifted Full-Bridge Converter With Full-Load Range ZVS and Low Duty Cycle Loss

Cited by 4 publications

References 26 publications

Novel Series-Parallel Phase-Shifted Full-Bridge Converters with Auxiliary LC Networks to Achieve Wide Lagging-Leg ZVS Range

Novel Series-Parallel Phase-Shifted Full-Bridge Converters with Auxiliary LC Networks to Achieve Wide Lagging-Leg ZVS Range

A New Zero-Voltage Zero-Current Switching Converter with Minimum Duty Cycle Loss

Isolated bidirectional DC-DC Converter: A topological review

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