US 11,777,363 B2
Electric machine with heat exchanging unit on surface of housing and cooling duct in rotor
Emil Håkansson, Gothenburg (SE); Joakim Ehn, Gothenburg (SE); Johan Andersson, Gothenburg (SE); and Johan Brunberg, Gothenburg (SE)
Assigned to VOLVO CAR CORPORATION, Gothenburg (SE)
Filed by Volvo Car Corporation, Gothenburg (SE)
Filed on Apr. 29, 2021, as Appl. No. 17/243,929.
Prior Publication US 2022/0352781 A1, Nov. 3, 2022
Int. Cl. H02K 5/20 (2006.01); H02K 5/18 (2006.01); H02K 9/19 (2006.01)
CPC H02K 5/203 (2021.01) [H02K 5/18 (2013.01); H02K 9/19 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electric machine comprising:
a stator unit;
a rotor unit with a rotor shaft;
a housing; and
an insert element,
the stator unit and the rotor unit being arranged coaxially inside the housing,
the rotor shaft comprising a cavity extending at least partially along a longitudinal axis of the rotor shaft to receive a medium,
the rotor shaft further comprising a medium inlet opening and a medium outlet opening,
the insert element being arranged in the cavity and abutting on the medium outlet opening, and the insert element being attached to the rotor shaft using a spring means, the spring means being configured to rotate the insert element such that the medium outlet opening of the rotor shaft being at least partially blocked by the insert element,
the insert element being configured to at least partially block the medium outlet opening depending on a rotation rate of the rotor shaft.