Condition Monitoring of SiC MOSFETs Utilizing Gate Leakage Current

Patrick Wang, Joseph Zatarski, Arijit Banerjee, John Donnal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Silicon carbide (SiC) MOSFETs are widely acknowledged for low loss, fast switching and remarkable thermal conductivity compared to silicon (Si) counterparts; however, reliability remains a significant hindrance for the wide adoption in power electronics. Condition monitoring of SiC devices in SiC-based power converters addresses the reliability issues by providing an early sign of potential failure. One of the most consistent failure precursors of degraded SiC MOSFETs is an increase of gate leakage current. This paper presents a method of condition monitoring the SiC MOSFETs with an external circuit that indirectly estimates the gate leakage current during operation. Experimental results obtained with a prototype circuit validate the analysis and method. Reliable information can be obtained for condition monitoring at various duty ratios, dc-link voltages, and load currents in the test setup. With proper calibration, this method opens opportunities to perform prognostic and health monitoring of SiC devices using the estimated on-state gate leakage current.

Original languageEnglish (US)
Title of host publicationAPEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1837-1843
Number of pages7
ISBN (Electronic)9781728148298
DOIs
StatePublished - Mar 2020
Event35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020 - New Orleans, United States
Duration: Mar 15 2020Mar 19 2020

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume2020-March

Conference

Conference35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
CountryUnited States
CityNew Orleans
Period3/15/203/19/20

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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