Loss and Thermal Modeling of Metal Oxide Varistors (MOV) Under Standard Current Surge Mission Profile

Ionut Vernica, Per Thåstrup Jensen, Huai Wang, Francesco Iannuzzo, Susanne Otto, Frede Blaabjerg

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Abstrakt

Because of their crucial role in protecting power electronic equipment against over-voltages and transients, metal oxide varistors (MOV) represent a key component of the electrical system. Although improper heat dissipation and internal temperature rises can lead to a significant decrease in performance or even to a wear-out failure of the MOV, there are very few studies in the literature describing the thermal modeling of varistors. Thus, in this paper, an instantaneous loss and thermal modeling procedure for MOV under a standard current surge mission profile is proposed. Initially, the specification and characteristics of a study-case varistor are presented, followed by a detailed description of the electro-thermal modeling procedure. Afterwards, the thermal behavior of the MOV is investigated and the differences between the heating and cool-down thermal models are highlighted. Finally, in order to validate the proposed electrothermal models, the temperature of the varistor is measured with an infrared camera. The experimental measurements are in well agreement with the simulation results, and thus, providing an initial validation of the proposed modeling procedure.
OriginalsprogEngelsk
Titel2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
Antal sider5
UdgivelsesstedUSA
ForlagIEEE Press
Publikationsdatosep. 2019
Sider7113-7117
Artikelnummer8913287
ISBN (Trykt)978-1-7281-0396-9
ISBN (Elektronisk)978-1-7281-0395-2
DOI
StatusUdgivet - sep. 2019
Begivenhed2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Baltimore, USA
Varighed: 29 sep. 20193 okt. 2019

Konference

Konference2019 IEEE Energy Conversion Congress and Exposition (ECCE)
Land/OmrådeUSA
By Baltimore
Periode29/09/201903/10/2019
NavnIEEE Energy Conversion Congress and Exposition
ISSN2329-3721

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