US 12,294,284 B2
Electric motor and drive system for heat transfer
Cédric Ledieu, Mont Saint Eloi (FR)
Assigned to NOVARES France, Clamart (FR)
Appl. No. 18/017,721
Filed by NOVARES FRANCE, Clamart (FR)
PCT Filed Jul. 23, 2021, PCT No. PCT/FR2021/051389
§ 371(c)(1), (2) Date Jan. 24, 2023,
PCT Pub. No. WO2022/018391, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 20/07808 (FR), filed on Jul. 24, 2020.
Prior Publication US 2023/0268804 A1, Aug. 24, 2023
Int. Cl. H02K 9/193 (2006.01); H02K 5/15 (2006.01); H02K 7/08 (2006.01); H02K 11/25 (2016.01)
CPC H02K 9/193 (2013.01) [H02K 5/15 (2013.01); H02K 7/083 (2013.01); H02K 11/25 (2016.01)] 6 Claims
OG exemplary drawing
 
1. A drive system comprising a circulation circuit for a heat-transfer fluid including successively:
a heat engine,
a first pump,
an electric motor comprising:
a rotor whose rotating shaft extends along an axis of extension,
a stator disposed around the rotor,
a front bearing and a rear bearing configured to be assembled by forming an internal cavity in which the rotor and the stator are housed, the front bearing comprising a cylindrical portion extending along the axis of extension, and
a lid having a bell shape that completely covers the rear bearing and at least the cylindrical portion of the front bearing, the lid comprising an internal chamber which extends at least partly around the internal cavity, a heat-transfer fluid inlet and a heat-transfer fluid outlet fluidly connected to the internal chamber so as to allow the circulation of a heat-transfer fluid in the internal chamber, fluidly connected in series, the first pump being configured to cause the circulation of the heat-transfer fluid in the circulation circuit from the internal chamber of the electric motor to the heat engine so as to perform a heat transfer from the electric motor to the heat engine in order to transfer heat energy from the electric motor to the heat engine thanks to the heat-transfer fluid, and
a refrigerant circuit for the circulation of a refrigerant liquid including successively:
the electric motor, wherein the lid is configured to form with the cylindrical portion at least one internal channel extending at least partly around the internal cavity and configured for the circulation of a refrigerant liquid,
a second pump, and
a heat exchanger configured to cool a refrigerant fluid, fluidly connected in series, the second pump being configured to cause the circulation of the refrigerant liquid in the refrigerant circuit from the heat exchanger to the internal channel in order to cool the electric motor.