Real-time optimization of iGBT/Diode cell switching under active voltage control

Y. Wang, P. Palmer, S.J. Finney, T.C. Lim, A. Bryant

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

28 Citations (Scopus)


A combined digital and analogue approach is introduced to establish a dynamic active voltage controller (AVC) for controlling an insulated gate bipolar transistor (IGBT), suitable for series connection of devices. In the AVC, the reference voltage dictates the switching trajectory of active voltage controlled IGBTs via a feedback loop. By means of employing adaptive and self-timing control methods to adjust the reference voltage profile according to the transient states on the power side, this new controller has achieved real-time optimization of the IGBT switching with lowest possible power losses. In particular, this new AVC has provided an efficient and flexible solution to addressing the diode reverse recovery and the IGBT-diode commutation during IGBT switch-on operation. The commonly seen voltage overshoot and extra power loss associated with diode reverse recovery voltage are greatly reduced in the new AVC. The optimal switching performance in experiments for both a single IGBT and IGBTs connected in series is given in this paper. This is an effective solution to IGBT control without snubber networks and shows the effectiveness of concurrent optimization of devices and circuits.
Original languageEnglish
Title of host publicationConference Record of the 2006 IEEE Industry Applications Conference.
Number of pages7
ISBN (Print)1-4244-0364-2
Publication statusPublished - 2006
Event2006 IEEE Industry Applications Conference 41st IAS Annual Meeting - Tampa, Florida, United States
Duration: 8 Oct 200612 Oct 2006


Conference2006 IEEE Industry Applications Conference 41st IAS Annual Meeting
Country/TerritoryUnited States
CityTampa, Florida


  • diode cell switching
  • voltage control


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