On-state voltage drop based power limit detection of IGBT inverters

Ionut Trintis, Pramod Ghimire, Stig Munk-Nielsen, Bjørn Rannestad

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

12 Citations (Scopus)
580 Downloads (Pure)

Abstract

Power density is a key performance factor in order to reduce the cost and size of a power converter. Because of the unknown junction temperature, today’s design margins are relatively high to ensure safe and a reliable operation. In this paper, the on-state voltage drop is measured online for all insulated gate bipolar transistors (IGBTs) in the inverter, using advanced gate driver. The die temperature is estimated and monitored on each device during power converter operation. Based on the monitored temperature in real time, the maximum power capability is detected. The output power is increased until a safe operating temperature of power modules. This enable a power density is increased by 11.16 kW/litre to 19.13 kW/litre in a low voltage power stack which is typically used in wind power converters. Experiment results are shown for safe operation of converter at around 1.2 MW, which is built in a standard
size for the 600 - 700 kW. Furthermore, the 1700 V, 1000 A power module is replaced with a 1400 A module to increase the load current.
Original languageEnglish
Title of host publicationProceedings of the 2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe)
Number of pages9
Place of PublicationGeneva, Switzerland
PublisherIEEE Press
Publication dateSept 2015
Pages1-9
DOIs
Publication statusPublished - Sept 2015
Event17th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2015 - Centre International de Conférence Genève (CICG), 17 rue Varembé CH . 1211 Genève 20, Geneva, Switzerland
Duration: 8 Sept 201510 Sept 2015

Conference

Conference17th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2015
LocationCentre International de Conférence Genève (CICG), 17 rue Varembé CH . 1211 Genève 20
Country/TerritorySwitzerland
CityGeneva
Period08/09/201510/09/2015

Keywords

  • Power density
  • Junction temperature
  • IGBT
  • Gate driving
  • Online monitoring

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