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Fast switching SiC cascode JFETs for EV traction inverters
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Wu, Ruizhu, Gonzalez, Jose Ortiz, Davletzhanova, Zarina, Mawby, Philip. A. and Alatise, Olayiwola M. (2020) Fast switching SiC cascode JFETs for EV traction inverters. In: Applied Power Electronics Conference and Exposition (APEC), Annual IEEE Conference, Virtual conference, 15-19 Mar 2020. Published in: 2020 IEEE Applied Power Electronics Conference and Exposition (APEC) pp. 3489-3496. ISBN 9781728148304. doi:10.1109/APEC39645.2020.9124052 ISSN 1048-2334.
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WRAP-Fast-switching-SiC-cascode-JFETs-EV-traction-Gonzalez-2020.pdf - Accepted Version - Requires a PDF viewer. Download (3308Kb) | Preview |
Official URL: http://dx.doi.org/10.1109/APEC39645.2020.9124052
Abstract
This paper investigates the potential performance of high speed SiC cascode JFETs in EV traction inverters with high switching frequencies. Traction inverters implemented with SiC devices have shown improved energy conversion efficiency compared to IGBT based traction inverters however SiC MOSFETs suffer from unstable threshold voltage due to charge trapping at the SiC/SiO 2 (due to high density of traps). Since SiC cascode JFETs combine low voltage silicon MOSFETs (at the input) with high speed/high-power density SiC JFETs (at the output), cascode JFETs combine the electrical gate oxide reliability of silicon devices with the power density of SiC. This paper simulates an EV driving cycle using experimental power loss measurements (at different currents and temperatures) of commercially available 650V SiC cascode JFETs and SiC MOSFETs. The inverter has been simulated at 10, 25 and 50 kHz to investigate the impact of increased switching frequency on device losses. The model is fully electrothermal since conduction and switching losses have been measured at different junction temperatures and used as inputs to the model. The results show the potential of superior performance of the SiC cascode JFET in terms of power loss and junction temperature swings. Furthermore, since higher switching frequencies might be desirable in future high-speed traction motors, the fast switching and low loss performance of SiC Cascode JFETs becomes more attractive.
| Item Type: | Conference Item (Paper) | |||||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TL Motor vehicles. Aeronautics. Astronautics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | |||||||||
| Library of Congress Subject Headings (LCSH): | Silicon carbide , Junction transistors , Electric vehicles, Electric vehicles -- Power supply, Electric inverters | |||||||||
| Journal or Publication Title: | 2020 IEEE Applied Power Electronics Conference and Exposition (APEC) | |||||||||
| Publisher: | IEEE | |||||||||
| ISBN: | 9781728148304 | |||||||||
| ISSN: | 1048-2334 | |||||||||
| Book Title: | 2020 IEEE Applied Power Electronics Conference and Exposition (APEC) | |||||||||
| Official Date: | 25 June 2020 | |||||||||
| Dates: |
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| Page Range: | pp. 3489-3496 | |||||||||
| DOI: | 10.1109/APEC39645.2020.9124052 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Reuse Statement (publisher, data, author rights): | © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Date of first compliant deposit: | 6 July 2020 | |||||||||
| Date of first compliant Open Access: | 6 July 2020 | |||||||||
| RIOXX Funder/Project Grant: |
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| Conference Paper Type: | Paper | |||||||||
| Title of Event: | Applied Power Electronics Conference and Exposition (APEC), Annual IEEE Conference | |||||||||
| Type of Event: | Conference | |||||||||
| Location of Event: | Virtual conference | |||||||||
| Date(s) of Event: | 15-19 Mar 2020 |
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