The motor comprises a rotor (1) with an external part and an internal part (17) and an internal stator (2). Both the surface of the stator (16) and the surface of the rotor are covered with pins (22,23) moving the air between the plates.

The cooling system has a seal round the magnetic circuit (2) and the stator windings (1) of the motor, allowing a dielectric fluid to be circulated through the stator and end windings (22). The dielectric fluid is chosen for good thermal properties, so hea...