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Innovative high-performance insulation material for electric motors

ceramic insulatorselectric motorelectromagnetic insulationHigh temperatureswinding


The present invention relates to a new method of coating copper conductors of electric motors, which not only protects them by ensuring optimal electromagnetic insulation, but also provides them with high resistance both chemically, e.g., against corrosion, and thermally up to even temperatures above 600°C

Technical features

At the state of the art, to protect and thus insulate the electromagnetic components of a motor, i.e., the copper-based conductors, materials with very low radiation and high temperature resistance characteristics are usually used, causing their deterioration and rapid loss of insulating properties and limiting the temperature range within which an electric motor can operate; very durable and high-performance ceramic enamels are also used, but they require complex construction and installation processes.

Therefore, a new methodology is proposed for the production and use of ceramic insulating coatings based on filled silicone resins, which can be easily adopted to effectively and efficiently electrically insulate copper conductors of electric motors and increase their operating temperature up to 600°.

TRL: 4

Possible Applications

  • Automotive field, electric motor sector: energy recovery from automotive turbochargers;
  • Aeronautical field: useful in gas turbine engine startup and power generation.



  • Increase the operating temperature range of an electric motor;
  • Simplify the construction and installation process of insulators;
  • Create more stable and long-lasting insulation than standard applications;
  • Remove the need for active systems to dissipate motor heat, avoiding the use of energy;
  • Increase the performance of electric motors operating in thermally severe environments (high temperatures);
  • Increase resistance to corrosive phenomena.