Energies (Jan 2024)

High Efficiency Dual-Active-Bridge Converter with Triple-Phase-Shift Control for Battery Charger of Electric Vehicles

  • Shih-hao Kuo,
  • Huang-Jen Chiu,
  • Che-Wei Chiang,
  • Ta-Wei Huang,
  • Yu-Chen Chang,
  • Serafin Bachman,
  • Szymon Piasecki,
  • Marek Jasinski,
  • Marek Turzyński

DOI
https://doi.org/10.3390/en17020354
Journal volume & issue
Vol. 17, no. 2
p. 354

Abstract

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An optimal modulation scheme with triple-phase-shift (TPS) control could increase the efficiency in the entire load range for a dual-active-bridge (DAB) converter under wide output voltage range conditions. Therefore, this study proposes a convergent approach to TPS mode selection, coupled with an optimal modulation scheme, ensuring the circuit’s efficiency over the entire range in the realm of a high-power and high-efficiency battery charger for electric vehicles. The convergent approach to TPS mode selection also reduces the numerous cases for small-signal analysis through general average modeling. After verifying the small-signal models under various voltage transfer ratios and load conditions to verify the stability, a converter prototype with a rated power of 15 kW is built and tested. Thus, a peak efficiency of 97.7% can be achieved.

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