The student Jon Anzola Garcia obtained an OUTSTANDING CUM LAUDE qualification with 'INTERNATIONAL DOCTORATE' mention

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The student Jon Anzola Garcia obtained an OUTSTANDING CUM LAUDE qualification with 'INTERNATIONAL DOCTORATE' mention

THESIS

The student Jon Anzola Garcia obtained an OUTSTANDING CUM LAUDE qualification with 'INTERNATIONAL DOCTORATE' mention

2023·02·23

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Thesis title: Partial Power Converters for DC-DC Applications

Court:

  • Chairmanship: Subhashish Bhattacharya (North Carolina State University)
  • Vocal: Javier Chivite Zabalza (Ingeteam)
  • Vocal: Michael Andersen (Technical University of Denmark DTU)
  • Vocal: Carlos Bernal Ruiz (Universidad de Zaragoza)
  • Secretary: Mikel Mazuela Larrañaga (Mondragon Unibertsitatea)

Abstract:

This thesis studies partial power processing (PPP) based architectures for DC-DC applications. This type of solutions aim to reduce the power processed by the power converter. This way, the power losses and the volume of the power converter is reduced.

The work starts with an overview on the PPP strategies. In this sense, the different solutions found in the literature are classified into three main strategies: differential power converters (DPC), partial power converters (PPC) and mixed strategies. Due to their numerous applications and high efficiency results, the thesis focuses on the PPC architectures.

PPC architectures are divided into two groups: input-parallel-output-series (IPOS) or input-series-output-parallel (ISOP) type architectures and fractional charging converters (FCC) type architectures. The main difference between the IPOS-ISOP type architectures and the FCC is the fact that the former requires isolated topologies. This thesis analyses the benefits that both type of architectures bring in comparison to conventional full power converter (FPC) architectures. Simulations and experimental results conclude that the IPOS-ISOP type architectures are the most promising solution in terms of volume reduction, high efficiency and low cost. Then, three applications of IPOS-ISOP type PPC architectures are studied for future implementation: electric vessel, hydrogen generation and electric vehicle (EV) fast charging.

Finally, a 50 kW PPC is designed and validated for EV charging. The converter consists of a dual active bridge (DAB) and, due to the PPC configuration, it processes a maximum power of 5 kW. This way, the implementation of Si-based discrete devices is enabled. The converter achieves a peak efficiency of 99.47 %.