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Lookup NU author(s): Dr Mohammed AlharbiORCiD,
Dr Mohamed Dahidah,
Dr Salaheddine Ethni,
Professor Volker Pickert
This is the authors' accepted manuscript of an article that has been published in its final definitive form by IEEE, 2023.
For re-use rights please refer to the publisher's terms and conditions.
Fast DC Chargers are the key-enablers for the massive roll-out of electric vehicles (EVs) due to the reduced charging time. On the other hand, the rapid growth in battery technology with different voltages and charging requirements has imposed additional hurdles on the charger design to meet the efficiency requirements. Multiphase interleaved converters with conventional phase-shedding control improves the efficiency for a wide range of operations. However, they tend to operate certain phases, resulting in uneven thermal stress among the converter phases. This paper proposes a rotating phase-shedding control to distribute the switching activities among all phases, enhancing the system's reliability whilst retaining the efficiency improvement. The proposed technique selects the proper number of active phases based on the required charging profile and periodically swaps them with other phases to even out the stress. The thermal profile is extracted to assess the thermal damage of the power switches. The performance of the proposed approach is evaluated and compared with the conventional phase-shedding. The simulation and experimentally validated results confirm that the proposed technique achieves a better even distribution of the thermal damage between the phases compared with the conventional one. This will ultimately extend the lifetime of the system.
Author(s): Alharbi MA, Marquez A, Dahidah MSA, Montero-Robina P, Ethni S, Pickert V, Leon J-I
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Power Electronics
Print publication date: 01/02/2023
Online publication date: 04/10/2022
Acceptance date: 28/09/2022
Date deposited: 29/09/2022
ISSN (print): 0885-8993
ISSN (electronic): 1941-0107
ePrints DOI: 10.57711/swyk-cf96
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