Power module fitted with an insulating

An solution to enhance the voltage whistand rating of commercial power modules


The proposed technology is an elastomer part that fits between the busbars and the power module housing and acts as an insulating screen. Demonstrators have been manufactured based on the XHP-3 housing geometry. However, the principle could applied on any types of packages. Dummy XHP-3 power modules and adapted busbars were also manufactured. Test conditions include clean, non-conductive pollution and conductive pollution conditions, each time with a dry and wet configuration.


Preliminary tests.


Increase of the maximum voltage capability in severe environment on standard power modules without performance degradation.


  • Outdoor or polluted environment
  • MVDC converter with high voltage rating
  • Wind farms (onshore and offshore)
  • Solar applications
  • Electric vehicles


  • Design of the insulating screen
  • Dielectric measurements with various pollution degree conditions
  • Patent WO2020109138A1
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