Integrated Magnetics Design for a Full-Bridge Phase-Shifted Converter

Liu, Yu-Chen; Xiao, Cheng-You; Huang, Chih Cheng; Chi, Pei-Chin; Chiu, Huang-Jen

doi:10.3390/en14010183

Cited by 3 publications

(6 citation statements)

References 8 publications

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“…Power inductor integration is critical to achieving System on Chip (SoC) [4] and System in Package (SiP) [5]. Integrated magnetics is a low-level integration, which combines several magnetic components, such as inductors and transformers, of a converter into a single magnetic structure [6]. The on-chip integration of a power inductor, aiming to achieve high saturation current in a small size (footprint) and a sufficient inductance value, is an essential building block for high-density power conversion.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of a Planar Permanent Magnet On-Chip Power Inductor

Abu Qahouq,

Al-Smadi

2024

Modelling

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The on-chip integration of a power inductor together with other power converter components of small sizes and high-saturation currents, while maintaining a desired or high inductance value, is here pursued. The use of soft magnetic cores increases inductance density but results in a reduced saturation current. This article presents a 3D physical model and a magnetic circuit model for an integrated on-chip power inductor (OPI) to double the saturation current using permanent magnet (PM) material. A ~50 nH, 7.5 A spiral permanent magnet on-chip power inductor (PMOI) is here designed, and a 3D physical model is then developed and simulated using the ANSYS®/Maxwell® software package (version 2017.1). The 3D physical model simulation results agree with the presented magnetic circuit model, and show that in the example PMOI design, the addition of the PM increases the saturation current of the OPI from 4 A to 7.5 A, while the size and inductance value remain unchanged.

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Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of a Planar Permanent Magnet On-Chip Power Inductor

Abu Qahouq,

Al-Smadi

2024

Modelling

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“…The ZVS range of the converter can be broadened by adding a series inductor or increasing the leakage inductance. [2][3][4] However, the series inductor increases the energy involved in the secondary-side oscillation, resulting in the slow decay of the oscillation voltage. It also causes a large duty cycle loss under heavy loads.…”

Section: Introductionmentioning

confidence: 99%

“…Since the appearance of the phase‐shift‐controlled full‐bridge converter, 1 many improved topologies have been proposed. The ZVS range of the converter can be broadened by adding a series inductor or increasing the leakage inductance 2–4 . However, the series inductor increases the energy involved in the secondary‐side oscillation, resulting in the slow decay of the oscillation voltage.…”

Section: Introductionmentioning

confidence: 99%

Wide zero‐voltage switching range full‐bridge converter based on adjustable parallel current

Gao

Tang

Wang

et al. 2023

Circuit Theory & Apps

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Aiming at the problems of narrow ZVS range, large duty cycle loss, and severe voltage oscillation of phase‐shift‐controlled full‐bridge converters, this paper proposes a converter that realizes ZVS by adjusting the parallel current. No additional series inductor is required, avoiding large duty cycle loss and weakening voltage oscillations on the secondary side. The converter with small duty cycle loss can use a transformer with a larger turns ratio, which can reduce the voltage stress of the secondary diodes and the filter inductor current ripple. The parallel current required to realize ZVS is analyzed theoretically considering the influence of leakage inductor energy on ZVS. A comparative experiment between the proposed converter and the conventional full‐bridge converter is carried out to verify the performance of the proposed converter.

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“…Furthermore, adjustments to the transformer turns ratio and resonant inductor value in a PSFBC can affect its overall conversion efficiency and performance in various application scenarios. Few papers have delved into the effects of these magnetic components on ZVS and conversion efficiency in PSFBCs [16][17][18][19]. Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Ref. [17] developed an optimization procedure for an integrated transformer employed in a center-tap PSFBC, where the transformer was wound on magnetic legs to reduce conduction losses caused by the alternating-current resistor. The study in [18] investigated an analytical treatment of ZVS and the interdependence of circuit parameters in PSFBCs.…”

Section: Introductionmentioning

confidence: 99%

Parameter Optimization of Magnetic Components for Phase-Shifted Full-Bridge Converters Using a Digital Twin

et al. 2023

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Due to their significant performance, Phase-Shifted Full-Bridge Converters (PSFBCs) have gained widespread adoption in medium- and high-power applications. The performance of a PSFBC is greatly influenced by its magnetic components, namely the transformer and resonance inductor. To address these challenges, this paper proposes a parameter optimization of magnetic components for PSFBCs, specifically the transformer turns ratio and resonance inductor value, to enhance conversion efficiency and minimize operational loss. A digital twin of PSFBCs enabling a more accurate loss estimation is proposed to achieve this objective. The proposed loss estimation method precisely calculates the effective and circulation intervals and the corresponding current points of the primary-side transformer current, resulting in improved accuracy. By leveraging the digital twin, the effects of transformer turns ratio and resonant inductor value on the conversion efficiency of a PSFBC can be efficiently simulated. This facilitates the parameter optimization of magnetic components, thereby minimizing operational losses across different application scenarios. This paper also designs and implements a PSFBC prototype with a rated input voltage of 380 V, output voltage of 24 V, and output current of 20 A. The experimental results show the influences of transformer turns ratio and resonant inductor value on the PSFBC and validate the proposed digital twin. The proposed parameter optimization of magnetic components is further evaluated across two application scenarios with varying utilization rates. The simulation results indicate a reduction of approximately 14% in operational loss per hour after applying the parameter optimization of magnetic components for the PSFBC used as a battery charger. The results demonstrate the effectiveness and practicality of the proposed digital twin in designing PSFBCs.

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Integrated Magnetics Design for a Full-Bridge Phase-Shifted Converter

Cited by 3 publications

References 8 publications

Modeling and Simulation of a Planar Permanent Magnet On-Chip Power Inductor

Modeling and Simulation of a Planar Permanent Magnet On-Chip Power Inductor

Wide zero‐voltage switching range full‐bridge converter based on adjustable parallel current

Parameter Optimization of Magnetic Components for Phase-Shifted Full-Bridge Converters Using a Digital Twin

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