Ultracapacitors Utilization for Automotive Applications

Authors

  • Z. Pfof
  • P. Vaculík

DOI:

https://doi.org/10.14311/1153

Keywords:

ultracapacitor, converter for ultracapacitors, soft switching, zero-voltage switching, fuel cell

Abstract

This paper describes the basic properties of ultracapacitors and a converter for ultracapacitors with application zero-voltage switching (ZVS). Because of the very high efficiency of the ultracapacitor, the efficiency of the converter for ultracapacitors also has to be high; otherwise, the converter reduces efficiency of the whole drive unit. Further, the paper describes the drive unit concept for the CityEl electric vehicle, with the use of ultracapacitors in cooperation with a fuel cell. This co-operation with ultracapacitors is useful for the supply unit as a fuel cell, which cannot deliver peak power in dynamic conditions while maintaining its nominal efficiency. However, this poses no problems for ultracapacitors.There is also a description of the basic principles of soft switching using zero-voltage and zero-current switching together with a comparison of the power losses between hard and soft switching. 

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Author Biographies

Z. Pfof

P. Vaculík

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Published

2010-01-01

How to Cite

Pfof, Z., & Vaculík, P. (2010). Ultracapacitors Utilization for Automotive Applications. Acta Polytechnica, 50(1). https://doi.org/10.14311/1153

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Section

Articles