Granted Patent B2

US 12,620,880 · App. 18/188,605 · Granted May 5, 2026

Inventors: Peter Wurster (Wiggensbach, DE); Patrick Knecht (Stuttgart, DE); Johannes Lange (Dettenheim, DE); Florian Braunbeck (Stuttgart, DE); Tobias Engelhardt (Stuttgart, DE)

Assignee: DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT

H02K15/12H02K7/04H02K15/03H02K15/165H02K2201/09

Abstract

Claims (25)

1 . A method for producing a rotor device for an electric motor, comprising:

providing a rotor shaft having at least one sheet metal packet joined to the rotor shaft, wherein the at least one sheet metal packet comprises magnetic units,

performing a transfer molding process, in which the magnetic units are fixed in their position in relation to the at least one sheet metal packet and at least one balancing disk is joined axially on the rotor shaft on at least one side of the at least one sheet metal packet in such a way that a gap of a defined width is ensured between the at least one balancing disk and the adjacent at least one sheet metal packet, the gap being filled with a molding compound used for the transfer molding process, wherein, at at least one radial position, the molding compound contacts both the at least one balancing disk and the adjacent at least one sheet metal packet,

determining an imbalance of the rotor device, and

compensating the imbalance by removing material from the at least one balancing disk.

2 . The method according to claim 1 , wherein the defined width of the gap is between 1 mm and 5 mm.

3 . The method according to claim 1 , wherein an inner diameter of the at least one balancing disk is significantly larger than the diameter of the rotor shaft at an axial position at which the at least one balancing disk is provided.

4 . The method according to claim 3 , further comprising bandaging the rotor device, wherein the bandaging additionally fixes the at least one balancing disk in the axial direction.

5 . The method according to claim 3 , wherein the molding compound fills a space between the inner diameter of the at least one balancing disk and the diameter of the rotor shaft at the axial position at which the at least one balancing disk is provided.

6 . The method according to claim 1 , wherein two balancing disks are provided on the rotor shaft, wherein one balancing disk is arranged on one side of the at least one sheet metal packet and the other balancing disk is arranged on an opposite side of the at least one sheet metal packet.

7 . The method according to claim 1 , wherein the removal of the material is carried out by providing bores.

8 . The method according to claim 7 , wherein the bores are drilled through an entire thickness of the at least one balancing disk.

9 . The method according to claim 7 , wherein the bores are parallel to the rotor shaft.

10 . The method according to claim 1 , wherein the molding compound is used in the transfer molding process, and wherein the molding compound has an adhesive effect in conjunction with the at least one balancing disk.

11 . The method according to claim 10 , wherein the molding compound positively locks the at least one balancing disk to the rotor shaft based on the adhesive effect.

12 . The method according to claim 1 , wherein the defined width of the gap is 2 mm.

13 . The method according to claim 1 , wherein performing the transfer molding process further comprises injecting the molding compound into the gap such by that same injection, the molding compound adheres the at least one balancing disk to the adjacent at least one sheet metal packet.

14 . The method according to claim 1 , wherein at each radial position that the molding compound contacts the at least one balancing disk, the molding compound contacts the adjacent at least one metal packet.

15 . A rotor device, comprising:

a rotor shaft,

at least one sheet metal packet with magnetic units joined on the rotor shaft, and

at least one balancing disk arranged axially on the rotor shaft,

wherein the magnetic units are fixed in their position in relation to the at least one sheet metal packet by transfer molding and the at least one balancing disk is joined on the rotor shaft by transfer molding,

wherein a gap is provided between the at least one sheet metal packet and an adjacent at least one balancing disk, the gap being filled by a molding compound used for the transfer molding, and

wherein, at at least one radial position, the molding compound contacts both the at least one balancing disk and the adjacent at least one sheet metal packet.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (28)