Design steps toward a 40-kVA SiC jfet inverter with natural-convection cooling and an efficiency exceeding 99.5%

Jacek Rąbkowski , Dimosthenis Peftitsis , Hans-Peter Nee


This paper describes the concept, design, construction, and experimental investigation of a 40-kVA inverter with silicon carbide junction field-effect transistors (JFETs). The inverter was designed to reach an efficiency exceeding 99.5%. The size of the heat sink is significantly reduced in comparison to silicon insulated-gate bipolar transistor designs, and the high efficiency makes it possible to use free-convection cooling. This could potentially increase reliability compared with solutions with fans. A very low conduction loss has been achieved by parallel connecting ten 85-m\Omega normally- on JFETs in each switch position. A special gate-drive solution was applied, forcing the transistors to switch very fast (approximately 10 kV/\mu\hbox{s}), resulting in very low switching losses. As output power is almost equal to input power, special effort was done to precisely determine the amount of semiconductor power losses via comparative thermal measurements. A detailed analysis of the measurements shows that the efficiency of the inverter is close to 99.7% at 40 kVA. © 1972-2012 IEEE.

Author Jacek Rąbkowski (FoEE / ICIE)
Jacek Rąbkowski,,
- The Institute of Control and Industrial Electronics
, Dimosthenis Peftitsis - [The Royal Institute of Technology (KTH)]
Dimosthenis Peftitsis,,
, Hans-Peter Nee - [The Royal Institute of Technology (KTH)]
Hans-Peter Nee,,
Journal seriesIEEE Transactions on Industry Applications, ISSN 0093-9994
Issue year2013
ASJC Classification2208 Electrical and Electronic Engineering; 2209 Industrial and Manufacturing Engineering; 2207 Control and Systems Engineering
Languageen angielski
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 35.0, 30-06-2020, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 30-06-2020, ArticleFromJournal
Publication indicators Scopus Citations = 33; WoS Citations = 29; GS Citations = 46.0; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 2.515; WoS Impact Factor: 2013 = 2.046 (2) - 2013=2.253 (5)
Citation count*47 (2020-09-16)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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