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  4. Output-Capacitance Hysteresis Losses of Field-Effect Transistors
 
conference paper

Output-Capacitance Hysteresis Losses of Field-Effect Transistors

Perera, Nirmana  
•
Jafari, Armin
•
Nela, Luca
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November 12, 2020
2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)
2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)

Resonant-type power converters are supposed to generate zero switching losses during soft-switching operation. In recent research, unexpected switching losses were reported in these converters, which were attributed to a large-signal hysteresis observed in the output-charge versus voltage (QV) characteristics of the power device. Since these converters subject the power semiconductor switch to different levels of peak voltages based on design requirements, the dependence of hysteresis losses on the voltage range is important. In this work, planar-Si, Si super-junction, SiC and GaN power device structures are investigated, and categorized based on their QV patterns. We report that for different device technologies, the large-signal hysteresis patterns of output charge show diverse dependencies on the excitation voltage amplitude. The frequency dependence of the hysteresis losses is also analysed and discussed. The presented results provide important insights in identifying the root causes for output-charge hysteresis, and may help to improve device spice models to properly account for soft-switching losses.

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Type
conference paper
DOI
10.1109/COMPEL49091.2020.9265823
Author(s)
Perera, Nirmana  
Jafari, Armin
Nela, Luca
Kampitsis, Georgios
Nikoo, Mohammad Samizadeh
Matioli, Elison  
Date Issued

2020-11-12

Publisher

IEEE

Published in
2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)
ISBN of the book

978-1-728171-60-9

Total of pages

8

Start page

1

End page

8

Subjects

Coss

•

hysteresis loss

•

output capacitance

•

Sawyer–Tower

•

soft-switching loss

•

wide-band-gap (WBG) devices

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
POWERLAB  
Event nameEvent placeEvent date
2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)

Aalborg, Denmark

November 9-12, 2020

Available on Infoscience
December 3, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/173873
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