Analytic Solutions for Minimum Conduction Loss Modulation of Dual Active Bridge Converters Including Frequency Variation

2020 ◽  
Author(s):  
Michael Saegmueller ◽  
Christoph Hackl ◽  
Rolf Witzmann ◽  
Rene Richter
Keyword(s):  
Analytic Solutions ◽  
Frequency Variation ◽  
Conduction Loss ◽  
Dual Active Bridge ◽  
Loss Modulation

scholarly journals Research on Modelling and Stability Characteristics of Electric Traffic Energy System Based on ZVS-DAB Converter

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Ayiguzhali Tuluhong ◽  
Weiqing Wang ◽  
Yongdong Li ◽  
Haiyun Wang ◽  
Lie Xu
Keyword(s):  
Mathematical Model ◽  
High Frequency ◽  
Heat Dissipation ◽  
Wide Band ◽  
Energy System ◽  
Wide Band Gap ◽  
Switching Speed ◽  
Zero Voltage Switching ◽  
Conduction Loss ◽  
Dual Active Bridge

We study and describe mostly used traditional simplified circuits for full-bridge Zero Voltage Switching-Dual Active Bridge (ZVS-DAB) converter and deduce their mathematical model. On this basis, we propose a high-frequency (HF) mathematical model, which takes into account conduction loss and HF characteristics of the ZVS-DAB converter model. We compare the static and dynamic stabilities of the traditional and the proposed HF mathematical model by simulation. Finally, the high-frequency planar transformer (HFPT) with good heat dissipation and the wide band gap (WBG) semiconductor SiC switches with fast switching speed are employed to build a 4.4 kw, 40 KHz experimental prototype to verify the effectiveness of the improved HF circuit of ZVS-DAB converter. The results show that the proposed HF mathematical model is superior to the traditional one, and it fully considers the HF characteristics of the circuit and effectively improves the HF oscillation, DC bias, and waveform distortion of the ZVS-DAB converter.

scholarly journals Analytic Solutions for Full Operating Range Single-Side ZVS Modulation of Dual Active Bridge Converters

2021 ◽  
Author(s):  
Michael Saegmueller ◽  
Christoph Hackl ◽  
Rolf Witzmann ◽  
Rene Richter
Keyword(s):  
Single Phase ◽  
Analytic Solutions ◽  
Modulation Scheme ◽  
Zero Voltage Switching ◽  
Operating Range ◽  
Dual Active Bridge ◽  
Switching Losses ◽  
Single Side ◽  
Secondary Side ◽  
Zero Voltage

<div><div><div><p>This paper presents analytic solutions for an optimal modulation scheme featuring low switching losses for a bidirec- tional single-phase dual active bridge (DAB) DC-DC converter used for charging high-voltage batteries of electric vehicles. The proposed modulation scheme facilitates zero-voltage switching (ZVS) for either the primary- or secondary-side full bridge of the DAB converter throughout the whole operating range while maintaining low conduction losses. The expressions are derived based on the current required for an ideal ZVS transition and enable for a direct computation of the respective optimal modulation parameters.</p></div></div></div>

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