Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

SiC-based EV charger for DC bus second-order ripple reduction

Blas Perez, Miguel, Yang, Peng, Ming, Wenlong ORCID: and Ugalde Loo, Carlos ORCID: 2023. SiC-based EV charger for DC bus second-order ripple reduction. IEEE Transactions on Transportation Electrification 10.1109/TTE.2023.3341394

[thumbnail of Accepted version Four-leg_buck_inv FINAL.pdf]
PDF - Accepted Post-Print Version
Download (3MB) | Preview


An attractive dc/ac inverter for electric vehicle (EV) chargers is the three-phase four-wire inverter as it is able to handle unbalanced loads, supply neutral current, and provide balanced voltages. However, generation of second-order ripple on the dc bus is inevitable under the presence of unbalanced loads. To mitigate the magnitude of this ripple, conventional four-wire inverters require large and expensive capacitors in the neutral leg. To alleviate these issues, this paper presents a novel three-phase four-wire inverter based on silicon carbide MOSFETs. The topology is configured as a dc/dc buck converter for each phase leg and the neutral leg. Moreover, the capacitance of the neutral leg has been reduced by around eight times compared to that of the conventional neutral leg topology, in turn increasing the power density and reducing overall cost. By adopting a suitably designed control strategy, the proposed topology decreases the second-order ripple on the dc bus and provides neutral current when operating under unbalanced conditions.

Item Type: Article
Date Type: Published Online
Status: In Press
Schools: Engineering
Publisher: Institute of Electrical and Electronics Engineers
ISSN: 2332-7782
Funders: EPRSC
Date of First Compliant Deposit: 6 December 2023
Date of Acceptance: 1 December 2023
Last Modified: 22 Jan 2024 16:33

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics