US 12,294,283 B2
System for cooling a drive device with several electric machines
Alexis Renotte, Moissy-Cramayel (FR); Julien Marc Nicolas Rambaud, Moissy-Cramayel (FR); Christophe Castelli, Moissy-Cramayel (FR); and Guillaume Porte, Moissy-Cramayel (FR)
Assigned to SAFRAN ELECTRICAL & POWER, Blagnac (FR)
Appl. No. 17/790,674
Filed by SAFRAN ELECTRICAL & POWER, Blagnac (FR)
PCT Filed Jan. 18, 2021, PCT No. PCT/FR2021/050082
§ 371(c)(1), (2) Date Jul. 1, 2022,
PCT Pub. No. WO2021/148744, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 2000521 (FR), filed on Jan. 20, 2020.
Prior Publication US 2023/0040452 A1, Feb. 9, 2023
Int. Cl. H02K 9/14 (2006.01); H02K 9/08 (2006.01); H02K 9/18 (2006.01); H02K 11/33 (2016.01)
CPC H02K 9/14 (2013.01) [H02K 9/08 (2013.01); H02K 9/18 (2013.01); H02K 11/33 (2016.01)] 13 Claims
OG exemplary drawing
 
1. A cooling system for a drive device with a plurality of electric machines, the cooling system comprising:
a hydraulic circuit for a coolant comprising:
a cooling part in a gearbox of the drive device for cooling said gearbox, and
an air/coolant heat exchanger comprising cooling walls forming channels for circulating coolant for cooling the coolant,
an air cooling circuit comprising:
a plurality of fans, rotationally coupled to the gearbox,
a cooling part between the cooling walls of the air/liquid heat exchanger,
wherein air sucked in and propelled by the fans, circulates by sweeping over the cooling walls in order to cool the cooling walls.