We are seeking innovative methods of cooling an electric motor. Improved cooling methods with higher efficiencies enable more compact designs, resulting in higher overall power densities.

Background:

Efficient e-motor cooling is one of the key factors for high power density e-motors/power electronics. Although e-motor/power electronics are highly efficient and thermal losses are low, restrained accessibility of thermal sources (e.g. especially winding in the rotor notch area) limits heat dissipation and therefore limits nominal power under given design space restrictions. Efficient cooling requires a heat sink close to heat source and a reduction of thermal interface materials between source and sink. A more efficient cooling design would therefore be advantageous.

Constraints:

  • Compatibility with automotive requirements
  • Highly efficient heat transfer coefficient

Desired outcome of the solution:

An innovative method of cooling an electric motor while taking into consideration space constraints.

Field of use and intended applications:

Automotive