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Analysis and Modeling of SiC JFET Bi-Directional Switches Parasitic Oscillation

Wang, Lina; Yang, Junyi; Ma, Haobo; Wang, Zeyuan; Olanrewaju, Kabir Oladele; Wheeler, Pat

Authors

Lina Wang

Junyi Yang

Haobo Ma

Zeyuan Wang

Kabir Oladele Olanrewaju



Abstract

Silicon carbide (SiC) junction field-effect transistor (JFET) based bi-directional switches (BDSs) have great potential in the construction of several power electronic circuits, including matrix converters, multi-level converters, solid state breakers, and so on. Parasitic oscillation in SiC JFET-based BDSs has direct impact on the stability and reliability of these circuits. Proper handling of parasitic oscillation becomes highly critical. This paper focuses on the parasitic oscillation suppression in SiC JFET-based BDSs. A parallel snubber capacitor or a series ferrite ring was often used to damp parasitic oscillation in switching circuits in the literature. However, conventionally, the snubber capacitance was obtained by time-consuming and labour-intensive trial-and-error methods. The main contribution of this study is to derive the simplified equivalent transient circuit of the SiC JFET-based BDS considering all parasitic elements and quantitatively define the reasonable range of the snubber capacitance. And the combined effect of the selected snubber capacitance and the selected ferrite ring is investigated. In the end, simulation and experimental results validate the effectiveness of the proposed method.

Citation

Wang, L., Yang, J., Ma, H., Wang, Z., Olanrewaju, K. O., & Wheeler, P. (2019). Analysis and Modeling of SiC JFET Bi-Directional Switches Parasitic Oscillation. IEEE Transactions on Power Electronics, 34(9), 8613-8625. https://doi.org/10.1109/tpel.2018.2885145

Journal Article Type Article
Acceptance Date Nov 26, 2018
Online Publication Date Dec 5, 2018
Publication Date 2019-09
Deposit Date May 19, 2020
Journal IEEE Transactions on Power Electronics
Print ISSN 0885-8993
Electronic ISSN 1941-0107
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 34
Issue 9
Pages 8613-8625
DOI https://doi.org/10.1109/tpel.2018.2885145
Keywords Electrical and Electronic Engineering
Public URL https://nottingham-repository.worktribe.com/output/2468109
Publisher URL https://ieeexplore.ieee.org/document/8561181