Motor & Stator Impregnation Applications

During the impregnation process the cavities between windings are closed and sealed. Other applications of impregnation include soleniods and transformers, electrical motors, coils and rotors. This provides better electrical insulation and prevents vibration. Impregnation increases the thermal conductivity and helps to reach a better environmental balance. Whether trickling, roll dipping, hot dipping, vertical dipping or potting – our solutions ensure a reliable process to guarantee a high quality and continuous impregnation result.

To learn more about our impregnation applications, or to see if bdtronic can add value to your process, please contact us today by filling out our easy to use form here.



Impregnation technology for H/EV motors to increase the insulation of the coils

The impregnation of windings and coils is required for the production of electric motors for both hybrid technology, 48-volt mild hybrids and full-electrical motors for cars and trucks. The impregnation significantly optimizes the performance of hybrid motors and electric motors and increases the insulation of the coils. The impregnation method trickling offers numerous advantages: lowest resin consumption with a high degree of filling, a clean, automatic process that is completely monitored and a perfect resin distribution even in narrow areas in the windings. Impregnation technology increases also the thermal conductivity and also contributes to a positive environmental Balance.

Learn more about trickling impregnation, or contact us here today.

Watch a video of the world's largest and fastest impregnation plant trickle electric motors with a cycle time of 45 seconds and an annual capacity of 500,000 parts




Potting (vacuum)

vacuum potting enscapulation impregnation

Potting impregnation is performed when an object is prepared with a mold or a base and then pre-heated. The resin is then potted into the component and the mold is pressed into the bore or the resin is injected from the bottom with a vacuum if the mold is already in place. The object is transferred to an oven to cure and the mold is pulled out.

To learn more about potting impregnation, contact us here today.

Roll dipping

Roll dipping is performed by placing the object (rotor or stator) on rotating tools. The resin is then sucked by the pre-heated windings through the slot while the surface is dipped into a resin bath. The object is then transferred into an over and is cured while rotating.


  • low resin consumption
  • high percentage of filling grad
  • clean and automatic process
  • process monitoring available
  • perfect resin distribution and selection of resin application
  • simple machine set up

To learn more about roll dipping impregnation, contact us here today.


Hot dipping

Hot dipping is performed by pre-heating the object, dipping the component into the resin, draining the object over the dip/dropping tank and then transferring it into an oven to cure.


  • low tooling and machine cost
  • simple process without rotation
  • low resin loss compared to normal dipping
  • high productivity 
  • versatile (simple set up of parameters)

To learn more about hot dipping impregnation, contact us here today.

Vertical dipping

Vertical dipping is performed when an object is pre-hated using a joule effect on wires and SWIR on the external side. The component is then dipped into the resin and drained over the dip tank with a desired angle and scraped clean. Once the cleaning is complete, the rotation is started and the current flows into the wires to cure. The SWIR cures the external resin.


  • high percentage of filling grad
  • low resin consumption
  • clean and automatic process
  • process monitoring available 
  • fast heating system
  • small surface occupied (no ovens)

To learn more about vertical dipping, contact us here today.