Optimized EPS Control to Achieve Full Load Range ZVS With Seamless Transition for Dual Active Bridge Converters

Xu, Guo; Li, Liting; Chen, Xiaoying; Liu, Yonglu; Sun, Yang; Su, Mei

doi:10.1109/tie.2020.3014562

Cited by 102 publications

(21 citation statements)

References 27 publications

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“…This approach is better suited for systems with high switching frequencies. The switching frequency is 100kHz in [248], 120kHz in [232], [233], 200kHz in [250] and 250kHz in [236]- [238]. > IEEE TRANSATIONS ON POWER ELECTRONICS < To inject a small circulating current, the auxiliary inductor can be connected in parallel with the voltage sources, such as L 1 and L 2 in Fig.…”

Section: ) Current Injectionmentioning

confidence: 99%

“…Besides, utilizing the magnetizing inductance is a simple method to inject a small circulating current, which has the same effect as adding L2 without any auxiliary magnetic component. To achieve complete ZVS, the magnetizing current has been widely utilized in SPS control [234], [235], EPS control [236], [237], DPS control [238], and TPS control [239], [240]. To better show the ZVS improvement, the voltage and current operation waveforms with current injection between point C and point D are displayed in Fig.…”

Section: ) Current Injectionmentioning

confidence: 99%

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Review of Dual-Active-Bridge Converters With Topological Modifications

Sha

et al. 2023

IEEE Trans. Power Electron.

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Section: ) Current Injectionmentioning

confidence: 99%

Section: ) Current Injectionmentioning

confidence: 99%

Review of Dual-Active-Bridge Converters With Topological Modifications

Sha

et al. 2023

IEEE Trans. Power Electron.

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“…In order to solve these issues, the control strategies with more control variables were proposed. With the DPS (Double Phase Shift) [6], EPS (Extended Phase Shift) [7] and the similar control strategies, optimized switch current stress [8], optimized rms current [9], soft switching range optimization [10,11] and circulating power optimization methods [12] were proposed. However, the multiple control variables make the control of the converter more complex and is difficult to be implemented.…”

Section: Introductionmentioning

confidence: 99%

Study on a Modified CLLC Converter Paralleling a Resonant Branch With the Transformer for Wide Voltage Range Applications

Wang,

Cheng,

Xie

2024

IEEE Access

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In this paper, a modified bidirectional CLLC DC/DC converter is proposed to improve the efficiency in wide voltage range applications. The proposed converter adopts a LC series resonant branch parallel with the transformer, so that the equivalent inductance of the parallel branch and the transformer magnetizing inductor varies with the switching frequency. When the required gain is small and the operating frequency is high, the switch's turn-off current and the circulating power can be reduced through the large impedance of the LC resonant circuit; When the required gain is large, the switching frequency decreases and the auxiliary branch impedance decreases to obtain a higher voltage conversion ratio. The steady state operation and characteristics of the presented converter are analyzed, a design flowchart and a design example of the modified CLLC are also presented. Furthermore, the model of modified CLLC is established and is reduced for simple analysis. A 48V/400V/800W prototype was built and the experimental results verified the correctness of the proposed converter and the feasibility of the modeling results. Compared with the traditional CLLC resonant converter, the efficiency under wide voltage range application is significantly improved.INDEX TERMS Bidirectional DC-DC converter, CLLC converter, resonant converter, wide voltage range applications, equivalent circuit model, reduced-order model

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“…To address the above problems, extensive research has been carried out on modulation and optimized strategies. By increasing the internal phase-shift angles within the primary or secondary H-bridges of DAB, the modulation strategies of extended phase shift (EPS) [6,7], dual phase shift (DPS) [8,9], and triple phase shift (TPS) [10][11][12][13][14] have been successively proposed, which reduce the conduction losses of the converter and expand the ZVS range with the suitable combination of phase-shift angles. On the other hand, Refs.…”

Section: Introductionmentioning

confidence: 99%

A Si IGBT/SiC MOSFET Hybrid Isolated Bidirectional DC–DC Converter for Reducing Losses and Costs of DC Solid State Transformer

Huang,

Wang,

et al. 2024

Electronics

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The DC solid state transformer (DCSST) is a crucial component for connecting buses of different voltage levels in the DC distribution grid. This paper proposes a Si IGBT/SiC MOSFET hybrid isolated bidirectional DC–DC converter and an optimized modulation strategy (OMS) to reduce the losses and costs of DCSST. Based on the analysis of topology and operating principles, a duty-cycle modulation strategy is proposed and the converter is modeled by the time domain analysis (TDA) method. Through the analysis of switching characteristics, an optimization problem is established, which aims to reduce the conduction losses of switches while ensuring zero-voltage switching (ZVS) for all switches and low-current turn-off for IGBTs simultaneously. The optimization problem is solved by the augmented Lagrangian genetic algorithm (ALGA), and the OMS for the proposed converter is deduced. Finally, a 2 kW experimental prototype with the primary voltage of 405–495 V and the secondary voltage of 150 V is built to verify the effectiveness of the proposed topology and OMS. The switching costs of the proposed converter is reduced by 27.3% and the efficiency is improved by up to 4.04% compared to the existing method.

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Optimized EPS Control to Achieve Full Load Range ZVS With Seamless Transition for Dual Active Bridge Converters

Cited by 102 publications

References 27 publications

Review of Dual-Active-Bridge Converters With Topological Modifications

Review of Dual-Active-Bridge Converters With Topological Modifications

Study on a Modified CLLC Converter Paralleling a Resonant Branch With the Transformer for Wide Voltage Range Applications

A Si IGBT/SiC MOSFET Hybrid Isolated Bidirectional DC–DC Converter for Reducing Losses and Costs of DC Solid State Transformer

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