US 12,463,481 B2
Rotor of an electric motor having a cooling device and a method for manufacturing a rotor of an electric motor having a cooling device
Florian Braunbeck, Bietigheim-Bissingen (DE); Tobias Engelhardt, Stuttgart (DE); Patrick Knecht, Stuttgart (DE); Johannes Lange, Dettenheim (DE); and Peter Wurster, Wiggensbach (DE)
Assigned to Dr. Ing. h. c. F. Porsche AG, Stuttgart (DE)
Filed by Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Stuttgart (DE)
Filed on Apr. 24, 2023, as Appl. No. 18/138,326.
Claims priority of application No. 10 2022 116 061.0 (DE), filed on Jun. 28, 2022.
Prior Publication US 2023/0421009 A1, Dec. 28, 2023
Int. Cl. H02K 1/32 (2006.01)
CPC H02K 1/32 (2013.01) 10 Claims
OG exemplary drawing
 
1. A method for manufacturing a rotor (1) of an electric motor (20), the rotor (1) having a rotor shaft receptacle opening (22) configured to receive a stator (8) of the electric motor (20) so that the rotor (1) is rotatable relative to the stator (8) about an axis of rotation corresponding to a longitudinal axis (2) of the rotor (1), the rotor (1) further having a rotor sheath (23) outward of the rotor shaft receptacle opening (22), and a cooling device (4) having cooling channels (11) formed between the rotor shaft receptacle opening (22) and the rotor sheath (23) of the rotor (1), the method comprising:
using a tool for forming individual blades (9) that have pockets for receiving permanent magnets, the tool having tool cores for forming passage openings (12) in the individual blades (9) during production of the individual blades (9) with each of the passage openings (12) being between two of the pockets for receiving the permanent magnets;
joining the individual blades (9) side-by-side along the longitudinal axis (2) of the rotor (1) so that the respective passage openings (12) of the blades (9) align to form the cooling channels (11) of the cooling device (4); and
applying a plastic sealing to surround the passage openings (12) that form the cooling channels (11).