Patent ID: 8896166
Filing Date: 2014-11-25
Classification: H02K

Abstract:
1. An electric drive unit comprising: an electric motor having a stator and a rotor; a gearbox; an electric circuit; a housing having a motor compartment in which is provided the electric motor, and a gearbox chamber in which is provided at least a part of the gearbox; a lubricating circuit through which flows a first fluid between the motor compartment and the gearbox chamber to lubricate and to cool the rotor and the gearbox; a cooling circuit at the peripherally of the motor compartment and through which flows a second fluid to cool the stator and the electric circuit; a first delivery device provided in the motor compartment and in communication with the lubricating circuit to convey the first fluid to components of the electric motor; and a second delivery device provided in the gearbox chamber and in communication with the lubricating circuit to convey the first fluid to components of the gearbox, wherein the lubricating circuit and the cooling circuit are configured to enable heat exchange between the first fluid and the second fluid during operation of the electric drive unit.