A Finite Element Analysis Model for Partial Discharges in Silicone Gel under a High Slew Rate, High-Frequency Square Wave Voltage in Low-Pressure Conditions

Simple item page
dc.contributor.authorBorghei, Moeinen
dc.contributor.authorGhassemi, Monaen
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2020-05-14T17:48:21Zen
dc.date.available2020-05-14T17:48:21Zen
dc.date.issued2020-05-01en
dc.date.updated2020-05-14T13:56:07Zen
dc.description.abstractWide bandgap (WBG) devices made from materials such as SiC, GaN, Ga<sub>2</sub>O<sub>3</sub> and diamond, which can tolerate higher voltages and currents compared to silicon-based devices, are the most promising approach for reducing the size and weight of power management and conversion systems. Silicone gel, which is the existing commercial option for encapsulation of power modules, is susceptible to partial discharges (PDs). PDs often occur in air-filled cavities located in high electric field regions around the sharp edges of metallization in the gel. This study focuses on the modeling of PD phenomenon in an air filled-cavity in silicone gel for the combination of (1) a fast, high-frequency square wave voltage and (2) low-pressure conditions. The low-pressure condition is common in the aviation industry where pressure can go as low as 4 psi. To integrate the pressure impact into PD model, in the first place, the model parameters are adjusted with the experimental results reported in the literature and in the second place, the dependencies of various PD characteristics such as dielectric constant and inception electric field on pressure are examined. Finally, the reflections of these changes in PD intensity, duration and inception time are investigated. The results imply that the low pressure at high altitudes can considerably affect the PD inception and extinction criterion, also the transient state conditions during PD events. These changes result in the prolongation of PD events and more intense ones. As the PD model is strongly dependent upon the accurate estimation electric field estimation of the system, a finite-element analysis (FEA) model developed in COMSOL Multiphysics linked with MATLAB is employed that numerically calculates the electric field distribution.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationBorghei, M.; Ghassemi, M. A Finite Element Analysis Model for Partial Discharges in Silicone Gel under a High Slew Rate, High-Frequency Square Wave Voltage in Low-Pressure Conditions. Energies 2020, 13, 2152.en
dc.identifier.doihttps://doi.org/10.3390/en13092152en
dc.identifier.urihttp://hdl.handle.net/10919/98392en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectfinite-element analysis modelen
dc.subjecthigh frequencyen
dc.subjecthigh slew rateen
dc.subjectlow-pressure conditionen
dc.subjectpartial dischargeen
dc.subjectsilicone gelen
dc.titleA Finite Element Analysis Model for Partial Discharges in Silicone Gel under a High Slew Rate, High-Frequency Square Wave Voltage in Low-Pressure Conditionsen
dc.title.serialEnergiesen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
energies-13-02152.pdf
Size:
2.27 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
Name:
license.txt
Size:
0 B
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Journal Articles, Multidisciplinary Digital Publishing Institute (MDPI)
Scholarly Works, Electrical and Computer Engineering