US 12,255,520 B2
Motor and method for cooling a motor
Markus Walbaum, Sint-Truiden (BE); Riné Pelders, Sint-Truiden (BE); Maximilian Hombsch, Sint-Truiden (BE); Jan Willem Van Der Vecht, Sint-Truiden (BE); and Alberto Arcos, Sint-Truiden (BE)
Assigned to PUNCH POWERTRAIN E-VEHICLES NV, Sint-Truiden (BE)
Appl. No. 17/789,703
Filed by Punch Powertrain N.V., Sint-Truiden (BE)
PCT Filed Dec. 30, 2020, PCT No. PCT/EP2020/088055
§ 371(c)(1), (2) Date Jun. 28, 2022,
PCT Pub. No. WO2021/136819, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 2019/6010 (BE), filed on Dec. 31, 2019.
Prior Publication US 2023/0034673 A1, Feb. 2, 2023
Int. Cl. H02K 1/32 (2006.01); H02K 5/20 (2006.01); H02K 9/197 (2006.01)
CPC H02K 9/197 (2013.01) [H02K 1/32 (2013.01); H02K 5/20 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A motor comprising:
a rotor shaft comprising a cooling channel having at least one inlet for receiving cooling fluid and at least one outlet at an outer radial side of the rotor shaft arranged to allow cooling fluid to flow out of the cooling channel, wherein the at least one outlet of the cooling channel is provided at a same end of the rotor shaft as the at least one inlet of the cooling channel,
the motor further comprising:
at least one outlet section fluidly connected to the at least one outlet of the cooling channel and arranged to allow the cooling fluid to flow out of the cooling channel,
wherein the at least one outlet section comprises at least one outlet opening for the cooling fluid to splash out,
wherein the at least one outlet section comprises an outlet channel fluidly connecting the at least one outlet of the cooling channel with the at least one outlet opening of the outlet section,
wherein a radial position of the at least one outlet opening of the outlet section, measured from a rotational axis of the rotor shaft, is larger than a radial position of the cooling channel inside of the rotor shaft such that when the motor is in operation cooling fluid is sucked towards the at least one outlet opening of the outlet section,
wherein a majority of the outlet channel is arranged in a radial direction of the rotor shaft, and
wherein the motor comprises a cooling fluid reservoir and wherein the at least one inlet of the cooling channel is fluidly connected to the cooling fluid reservoir.