Comparison of Hybrid Electric Vehicle Power Electronics Cooling Options

Research output: Contribution to conferencePaper


This study quantifies the heat dissipation potential of three inverter package configurations over a range of control factors. These factors include coolant temperature, number of sides available for cooling, effective heat transfer coefficient, maximum semiconductor junction temperature, and interface material thermal resistance. Heat dissipation potentials are examined in contrast to a researchgoal to use 105..deg..C coolant and dissipate 200 W/cm2 heat across the insulated gate bipolar transistor and diode silicon area. Advanced double-sided cooling configurations with aggressive heat transfer coefficients show the possibility of meeting these targets for a 125..deg..C maximum junction temperature, but further investigation is needed. Even with maximum tolerable junction temperaturesof 200..deg..C, effective heat transfer coefficients of 5,000 to 10,000 W/m2-K will be needed for coolant temperatures of 105..deg..C or higher.
Original languageAmerican English
Number of pages11
StatePublished - 2008
EventVehicle Power and Propulsion Conference 2007 - Arlington, Texas
Duration: 9 Sep 200712 Sep 2007


ConferenceVehicle Power and Propulsion Conference 2007
CityArlington, Texas

NREL Publication Number

  • NREL/CP-540-41886


  • heat dissipation potential
  • hybrid electric vehicles (HEV)
  • inverter package
  • power electronics


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