Efficiency optimisation of ZVS isolated bidirectional DAB converters

Dung, Nguyen Anh; Chiu, Huang‐Jen; Lin, Jing‐Yuan; Hsieh, Yao-Ching; Liu, Yuchen

doi:10.1049/iet-pel.2017.0723

Cited by 27 publications

(12 citation statements)

References 20 publications

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“…12(e) and (f), are employed to implement ZVS performances, and under heavy-load condition, the EPS modulation methods are selected to obtain ZVS performance and to reduce the conducting losses of the NSDAB dc-dc converter. Similarly, some other modulation methods are also proposed to achieve ZVS performance of the NSDAB dc-dc converter [70], [71], and based on these strategies, the ZVS range of the NSDBA dc-dc converter will be extended.…”

Section: Zvs Range Optimization Strategymentioning

confidence: 99%

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

Hou

2020

IEEE Trans. Power Electron.

347

119

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The nonresonant single-phase dual-active-bridge (NSDAB) dc-dc converter has been increasingly adopted for isolated dc-dc power conversion systems. Over the past few years, significant research has been carried out to address the technical challenges associated with modulations and controls of the NSDAB dc-dc converter. The aim of this paper is to review and compare these recent state-of-the-art modulation and control strategies. First, the modulation strategies for the NSDAB dc-dc converter are analyzed. All possible phase-shift patterns are demonstrated, and the correlation analysis of the typical phases-shift modulation methods for the NSDAB dc-dc converter is presented. Then, an overview of steady-state efficiency-optimization strategies is discussed for the NSDAB dc-dc converter. Moreover, a review of optimized techniques for dynamic responses is also provided. For both the efficiency and dynamic optimizations, thorough comparisons and recommendations are provided in this paper. Finally, to improve both steady-state and transient performances, a combination approach to optimize both the efficiency and dynamics for an NSDAB dc-dc converter based on the reviewed methods is presented in this paper. Index Terms-Current feedback control, current stress, dualactive-bridge (DAB) converter, dynamic performances, efficiency, observer-based control, power control, power losses, reactive power. NOMENCLATURENSDAB Nonresonant single-phase dual-active-bridge. EV Electrical vehicle. SST Solid-state transformer. BTB Back-to-back. MMDCT Modular multilevel dc-link solid-state transformer. SPS Single-phase-shift. ZVS Zero-voltage-switching. DPS Dual-phase-shift. EPS Extended-phase-shift. TPS Triple-phase-shift.

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Section: Zvs Range Optimization Strategymentioning

confidence: 99%

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

Hou

2020

IEEE Trans. Power Electron.

347

119

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“…To reduce switching losses, a new modulation schema combining different operation modes that achieve high efficiency in a wide voltage/power range has been proposed [16]. Additionally, a duty control algorithm has been proposed in [17] to achieve zero-voltage switching (ZVS) for all switches at light-load conditions. However, these strategies are not suitable for applications with high-voltage conversion ratios.…”

Section: Introductionmentioning

confidence: 99%

Modulation strategy for improving the voltage gain of the dual‐active‐bridge converter

Wang

et al. 2020

IET Power Electronics

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A novel modulation strategy for improving the voltage gain of a dual-active-bridge converter is proposed herein. Under the strategy, the converter performs a high-voltage gain under a low transformer turns ratio, thereby improving the transmission efficiency of the transformer because the large turns ratio typically results in large parasitic parameters, such as leakage inductance or distributed capacitance. In addition, voltage spikes can be avoided as the energy caused by leakage inductance is recycled to the output side. The operating principle of the proposed modulation strategy is discussed in detail herein. Moreover, the zero-voltage switching conditions in both buck and boost modes are analysed and derived. Finally, a prototype with a 350 V high voltage, 48 V low voltage, and 1 kW output power is established, and the conversion efficiencies of 94.2% in buck mode and 93.2% in boost mode are obtained. Experimental results verify the validity of the proposed modulation strategy.

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“…The triple active bridge (TAB) [4–6] can realise not only dc voltage conversion but also realise bidirectional power transmission. Unlike the dual active bridge (DAB) [7, 8], TAB has higher control flexibility and better power supply reliability. Moreover, the high‐frequency transformer is employed to provide galvanic isolation and voltage matching, which can significantly reduce the volume and weight, as well as improve the overall conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Transient DC bias suppression of three‐port isolated DC–DC converter

Liu

et al. 2020

IET power electron.

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Efficiency optimisation of ZVS isolated bidirectional DAB converters

Cited by 27 publications

References 20 publications

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

Modulation strategy for improving the voltage gain of the dual‐active‐bridge converter

Transient DC bias suppression of three‐port isolated DC–DC converter

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