Modeling and Optimization of Dual Active Bridge DC-DC Converter with Dead-Time Effect under Triple-Phase-Shift Control

Chaochao Song, Alian Chen, Yiwei Pan, Chunshui Du and Chenghui Zhang
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Chaochao Song: School of Control Science and Engineering, Shandong University, Jinan 250061, China
Alian Chen: School of Control Science and Engineering, Shandong University, Jinan 250061, China
Yiwei Pan: School of Control Science and Engineering, Shandong University, Jinan 250061, China
Chunshui Du: School of Control Science and Engineering, Shandong University, Jinan 250061, China
Chenghui Zhang: School of Control Science and Engineering, Shandong University, Jinan 250061, China

Energies, 2019, vol. 12, issue 6, 1-24

Abstract: Dead-time effect has become an apparent issue in high-switching-frequency high-power dual active bridge (DAB) DC-DC converter. This paper gives a detailed analysis of phase-shift errors effect caused by dead time, including output voltage offset, soft-switching failure, optimal scheme failure, etc. Phase-shift errors effect will invalidate traditional analyses of optimal control and mislead the design of DAB converter. To overcome these drawbacks, various operating modes and an accurate transmission power model incorporating dead time under triple-phase-shift (TPS) control are developed. On this basis, an optimal TPS incorporating dead time (TPSiDT) scheme is further proposed to minimize the current stress, while guaranteeing soft-switching operation by using Lagrange multiplier method (LMM) and Genetic Algorithm (GA). The novel transmission power model can provide accurate power flow computation to avoid phase-shift errors. Therefore, in practical applications, the minimum current stress and soft-switching operation can be guaranteed, and the efficiency of DAB converter can be improved. Finally, the experimental results verify the feasibility of the proposed TPSiDT scheme.

Keywords: dual active bridge DC-DC converter; dead-time effect; phase-shift errors; transmission power model; soft-switching operation; current stress (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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