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Bidirectional wide range and high voltage gain buck‐boost DC‐DC converter for EV chargers empowering V2G‐G2V applications
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Rahim Ildarabadi ,
Hamed Heydari‐Doostabad,
Mohammad Monfared ,
Terence O'Donnell
IET Power Electronics, Volume: 17, Issue: 2, Pages: 230 - 250
Swansea University Author:
Mohammad Monfared
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DOI (Published version): 10.1049/pel2.12630
Abstract
This paper proposes a new wide range bidirectional buck-boost dc-dc converter with improved voltage gain in either forward (discharging) or backward (charging) direction for electric vehicle (EV) applications. The converter has high-voltage gain ratio with no theoretical limits in the output voltage...
| Published in: | IET Power Electronics |
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| ISSN: | 1755-4535 1755-4543 |
| Published: |
Institution of Engineering and Technology (IET)
2024
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa65571 |
| Abstract: |
This paper proposes a new wide range bidirectional buck-boost dc-dc converter with improved voltage gain in either forward (discharging) or backward (charging) direction for electric vehicle (EV) applications. The converter has high-voltage gain ratio with no theoretical limits in the output voltage in both directions, and presents a good balance between the component count, number of conducting components, semiconductor device ratings, having direct connection between input and output terminals, and efficiency which makes it a practical solution for the EV charger levels 1, 2, and 3 power converter unit. The operating principle, steady-state characteristics including the current and voltage stress of the switches, and comparison with other state of the art dc-dc bidirectional converters are explained in detail. In order to validate the theoretical analysis, a 500 W, 200 V or 40 V to 180 V laboratory prototype is implemented. The obtained results confirm the applicability of this structure and demonstrate a peak efficiency of 97.2% in the forward and 97.6% in the backward direction modes of operation. |
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| Keywords: |
battery chargers; dc-dc power convertors; electric vehicle charging; power electronics |
| College: |
Faculty of Science and Engineering |
| Funders: |
This work has been supported by Science Foundation Ireland under grant number SFI/21/SPP/3756. |
| Issue: |
2 |
| Start Page: |
230 |
| End Page: |
250 |