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Design and Analysis of Modular Multilevel Reconfigurable Battery Converters for Variable Bus Voltage Powertrains

Publication ,  Journal Article
Kacetl, J; Fang, J; Kacetl, T; Tashakor, N; Goetz, S
Published in: IEEE Transactions on Power Electronics
January 1, 2023

Larger battery packs, an efficient battery management system, highly efficient electromechanical conversion, and fast battery charging are the key factors for extending the drive range of electric vehicles and the expansion of electromobility. We present a novel highly stable modular multilevel powertrain design with a variable dc-bus voltage, active inner battery energy flow control, and reduced filter size. The underlying powertrain design replaces conventional hard-wired batteries by a modular multilevel architecture, thus modularizing the battery pack and increasing the energy efficiency, reducing the output filter size, and providing full control over the output voltage and energy flow of the battery cells. We analyse the large-signal stability of the proposed system and compare it to dc/dc-dc/ac conventional multiconverter powertrains, demonstrating better stability and lower filter requirements. Further, we experimentally evaluate the proposed system structure. In the experimental setup, we achieve stable converter operation with the output filter capacitor reduced by a factor of 24 and the filter inductor reduced by a factor of 17 compared to dc-dc-dc-ac reference system, thereby leading to a significant reduction of system cost, size, and weight.

Duke Scholars

Published In

IEEE Transactions on Power Electronics

DOI

EISSN

1941-0107

ISSN

0885-8993

Publication Date

January 1, 2023

Volume

38

Issue

1

Start / End Page

130 / 142

Related Subject Headings

  • Electrical & Electronic Engineering
  • 4009 Electronics, sensors and digital hardware
  • 4008 Electrical engineering
  • 0906 Electrical and Electronic Engineering
 

Citation

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Kacetl, J., Fang, J., Kacetl, T., Tashakor, N., & Goetz, S. (2023). Design and Analysis of Modular Multilevel Reconfigurable Battery Converters for Variable Bus Voltage Powertrains. IEEE Transactions on Power Electronics, 38(1), 130–142. https://doi.org/10.1109/TPEL.2022.3179285
Kacetl, J., J. Fang, T. Kacetl, N. Tashakor, and S. Goetz. “Design and Analysis of Modular Multilevel Reconfigurable Battery Converters for Variable Bus Voltage Powertrains.” IEEE Transactions on Power Electronics 38, no. 1 (January 1, 2023): 130–42. https://doi.org/10.1109/TPEL.2022.3179285.
Kacetl J, Fang J, Kacetl T, Tashakor N, Goetz S. Design and Analysis of Modular Multilevel Reconfigurable Battery Converters for Variable Bus Voltage Powertrains. IEEE Transactions on Power Electronics. 2023 Jan 1;38(1):130–42.
Kacetl, J., et al. “Design and Analysis of Modular Multilevel Reconfigurable Battery Converters for Variable Bus Voltage Powertrains.” IEEE Transactions on Power Electronics, vol. 38, no. 1, Jan. 2023, pp. 130–42. Scopus, doi:10.1109/TPEL.2022.3179285.
Kacetl J, Fang J, Kacetl T, Tashakor N, Goetz S. Design and Analysis of Modular Multilevel Reconfigurable Battery Converters for Variable Bus Voltage Powertrains. IEEE Transactions on Power Electronics. 2023 Jan 1;38(1):130–142.

Published In

IEEE Transactions on Power Electronics

DOI

EISSN

1941-0107

ISSN

0885-8993

Publication Date

January 1, 2023

Volume

38

Issue

1

Start / End Page

130 / 142

Related Subject Headings

  • Electrical & Electronic Engineering
  • 4009 Electronics, sensors and digital hardware
  • 4008 Electrical engineering
  • 0906 Electrical and Electronic Engineering