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Magnar Hernes

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Magnar Hernes

Seniorforsker

Magnar Hernes
Telefon: 930 03 738
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Avdeling: Energisystemer
Kontorsted: Trondheim

Publikasjoner og ansvarsområder

Publikasjon
https://www.sintef.no/publikasjoner/publikasjon/?pubid=1702309

The aim of this work is to obtain a reliable estimation of the remaining lifetime of power-electronic modules. Lifetime models provide information on the fatigue durability of power modules under repetitive loading circumstances. However, the thermo-mechanical stresses that a device is exposed to du...

Forfattere Antonios Antonopoulos Salvatore D'Arco Magnar Hernes Dimosthenis Peftitsis
År 2019
Type Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publikasjon
https://www.sintef.no/publikasjoner/publikasjon/?pubid=1637260

This paper presents a driver topology intended for WBG devices with the goal of improving the switching performance. In particular, the initial delay time of the switching transient was targeted. In high power and high frequency bridge converters, the dead time causes output voltage waveform distort...

Forfattere Ole Christian Spro Giuseppe Guidi Kjell Ljøkelsøy Magnar Hernes Ole-Morten Midtgård Tore Marvin Undeland
År 2018
Type Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publikasjon
https://www.sintef.no/publikasjoner/publikasjon/?pubid=1638774

This paper investigates the power cycling methodology for reliability testing of SiC metal-oxide-semiconductor field-effect transistors (MOSFETs). Dedicated test benches were designed and built to study this issue. The results indicate that power cycling of SiC MOSFETs is affected by threshold volta...

Forfattere Fredrik T. B. W. Göthner Ole Christian Spro Magnar Hernes Dimosthenis Peftitsis
År 2018
Type Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publikasjon
https://www.sintef.no/publikasjoner/publikasjon/?pubid=1385622

To facilitate operation of power electronics for subsea operation at ambient pressure components have to be submerged in a liquid. Equipment and schemes for testing of long term properties have been developed. Several techniques were used to investigate compatibility between a silicone gel and vario...

År 2016
Type Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publikasjon
https://www.sintef.no/publikasjoner/publikasjon/?pubid=1391562

This paper presents a numerical analysis of the temperature profiles within the semiconductor devices of modular multilevel converters (MMCs). These temperature profiles are essential for assessing the power-cycling lifetime of IGBT modules, which influences the converter reliability. An electro-the...

Forfattere Gilbert Bergna Diaz Salvatore D'Arco Jon Are Wold Suul Magnar Hernes
År 2016
Type Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publikasjon
https://www.sintef.no/publikasjoner/publikasjon/?pubid=1398826

The demands on reliable and fault tolerant power electronic devices are increasing. One opportunity to increase the IGBT short circuit ruggedness is to modify the thermal capacitance and the thermal resistance close to the chip and hence extend the possible short circuit duration. Therefore simulati...

Forfattere Lukas Tinschert Magnar Hernes Josef Lutz
År 2016
Type Vitenskapelig artikkel
Publikasjon
https://www.sintef.no/publikasjoner/publikasjon/?pubid=1236187

Reliability of Press-Pack IGBTs is a topic with limited published data and information. This paper presents results of a power cycling test with state-of-the-art high power devices. An accelerated lifetime test scheme was defined, and six out of eight devices were tested until failure. A microscopy ...

Forfattere Lukas Tinschert Atle Rygg Årdal Tilo Poller Marco Bohlländer Magnar Hernes Josef Lutz
År 2015
Type Vitenskapelig artikkel