Impact of the Transformer Magnetizing Inductance on the Performance of the Dual-Active Bridge Converter

Yin, Shiyuan; Debnath, Suman; Wojda, Rafal P.; Marthi, Phani Ratna Vanamali; Saeedifard, Maryam

doi:10.1109/compel52922.2021.9645978

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…However, as described by the authors in [23]- [27], a reduction in the magnetizing inductance of a DAB's transformer can lead to an extension of the ZVS region. As shown in Fig.…”

Section: A Variation Of the Magnetizing Inductancementioning

confidence: 99%

Dual Active Bridge Converter With Variable Transformer for Wide Voltage and Wide Load Range Operation

Suarez Buitrago,

Cobaleda,

Martinez

2023

IEEE Access

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This study explores the use of a magnetically controlled transformer within a dual active bridge (DAB) converter. This novel approach introduces a new degree of freedom to the control of the topology through the variation of the equivalent turns ratio of its high-frequency transformer. By adjusting the turns ratio, the converter maintains a primary referred DC voltage gain of one, regardless of varying input/output voltages. This theoretical approach represents the simplest solution to achieve minimum effective currents and enable zero voltage switching (ZVS) under light-load conditions, particularly for unmatched voltage scenarios. This paper provides a comprehensive analysis of the converter's currents, output power, efficiency, and their relationship with the magnetic flux density conditions in the transformer. Furthermore, the trade-off between the total turns ratio variation and the circulating currents in the converter is described in detail. Additionally, considering the specific characteristics of this controllable magnetic device, a straightforward modulation strategy to minimize the effective currents under wide output voltage variations is introduced. An experimental prototype with an input voltage of 100V and a rated power of 1.2 kW presents a minimum efficiency of 90% under light-load conditions (5% of the maximum load), considering output voltage variations ranging from 130V to 180V.

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“…However, as described by the authors in [23]- [27], a reduction in the magnetizing inductance of a DAB's transformer can lead to an extension of the ZVS region. As shown in Fig.…”

Section: A Variation Of the Magnetizing Inductancementioning

confidence: 99%

Dual Active Bridge Converter With Variable Transformer for Wide Voltage and Wide Load Range Operation

Suarez Buitrago,

Cobaleda,

Martinez

2023

IEEE Access

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“…A study [9] of a DAB converter that operates over a broad voltage span from 100-700 V, representing a 75% variation, was presented for microgrid applications. Choosing the right leakage inductance to reduce RMS currents and thereby minimize copper losses across the entire range of operations is crucial for achieving peak performance [10]. Choosing a lower value than the required leakage inductance can boost power transfer capacity but comes at the cost of increased reactive power, especially at low loads [11].…”

Section: Introductionmentioning

confidence: 99%

Analytical Selection of Leakage Inductance for Single-Phase Dual Active Bridge Converters

Naseem,

Seok

2024

Applied Sciences

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The single-phase dual active bridge (DAB) DC/DC converter is a vital component in modern power electronics systems, facilitating efficient bidirectional power transfer between various energy sources and loads. One of the critical aspects in the design of such converters is the selection of an appropriate leakage inductance, as it significantly affects the circulating power within the converter. This study investigates the influence of inductance on the reactive power flow and introduces an analytical formula for calculating the necessary leakage inductance based on the specified rated power of the DAB converter. By employing the inductance values determined through the proposed formula, the developed power control-based modulation method, implemented in discrete time, successfully achieves zero reactive power caused by the first harmonic components under all load conditions. This selection of leakage inductance optimizes the performance of the converter ensuring efficient power delivery across various applications. The applicability of this method extends to various DAB applications, including electric vehicles, integration with asynchronous microgrids, and aerospace systems.

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Optimizing inductance for minimizing reactive power in single-phase-shift modulated dual active bridge converters under variable input voltage

Yong,

Seo,

Kim

et al. 2024

J. Power Electron.

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Impact of the Transformer Magnetizing Inductance on the Performance of the Dual-Active Bridge Converter

Cited by 7 publications

References 7 publications

Dual Active Bridge Converter With Variable Transformer for Wide Voltage and Wide Load Range Operation

Dual Active Bridge Converter With Variable Transformer for Wide Voltage and Wide Load Range Operation

Analytical Selection of Leakage Inductance for Single-Phase Dual Active Bridge Converters

Optimizing inductance for minimizing reactive power in single-phase-shift modulated dual active bridge converters under variable input voltage

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