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A New Non-isolated ZCS Bidirectional Buck–Boost DC–DC Converter for Energy Storage Applications in Electric Vehicles

  • Research Article - Electrical Engineering
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Abstract

This paper proposes a new ZCS non-isolated bidirectional buck–boost DC–DC converter for energy storage applications. The conventional bidirectional converter derived with auxiliary edge resonant cell to obtain ZCS turn-on/turn-off condition of the main switches. The proposed converter is operated in boost and buck modes with soft-switching operations in order to have minimized current stresses and reduced switching losses since the resonating current for the zero-current switching does not flow through the main switches. The proposed converter improves the overall efficiency over hard-switching converter for high-power energy storage applications. This paper mainly describes the operation principles of the topology, simulation evaluation, and its validation by the experimental results on 50 V–120 V–300 W system, which proved the soft-switching capability of this converter and its performance.

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Abbreviations

V C b :

Voltage of resonant capacitor C b

I S 2 :

Current of the main switch S 2

I S b :

Current of the auxiliary switch S b

L equ :

Equivalent inductance

L :

Resonant inductor

L b :

Resonant inductor

C b and C a :

Resonant capacitors

K 1, K 2 :

Constants

V o :

Output voltage

I peak :

Peak value of input current of the auxiliary circuit

P o :

Output power

\({\eta}\) :

Efficiency

V 1 :

Input voltage (boost mode)

V 2 :

Input voltage (buck mode)

References

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Authors and Affiliations

  1. Regional Innovation Centre for Electrical Engineering, University of West Bohemia, Univerzitni 26, 30614, Pilsen, Czech Republic

    Veera Venkata Subrahmanya Kumar Bhajana & Pavel Drabek

Authors
  1. Veera Venkata Subrahmanya Kumar Bhajana
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  2. Pavel Drabek
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Correspondence to Veera Venkata Subrahmanya Kumar Bhajana.

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Bhajana, V.V.S.K., Drabek, P. A New Non-isolated ZCS Bidirectional Buck–Boost DC–DC Converter for Energy Storage Applications in Electric Vehicles. Arab J Sci Eng 40, 3595–3605 (2015). https://doi.org/10.1007/s13369-015-1840-5

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  • DOI: https://doi.org/10.1007/s13369-015-1840-5

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