US 12,355,320 B2
Winding head, stator tooth, electric motor, and aircraft
Dániel Kutrovich, Pomáz (HU); Zoltán Nádudvari, Pálosvörösmart (HU); János Dorogi, Halásztelek (HU); and Gergely György Balazs, Budapest (HU)
Assigned to Rolls-Royce Deutschland Ltd & Co KG, Blankenfelde-Mahlow (DE)
Filed by Dániel Kutrovich, Pomáz (HU); Zoltán Nádudvari, Pálosvörösmart (HU); János Dorogi, Halásztelek (HU); and Gergely György Balazs, Budapest (HU)
Filed on Nov. 16, 2020, as Appl. No. 17/099,751.
Claims priority of application No. 19209817 (EP), filed on Nov. 18, 2019.
Prior Publication US 2021/0152038 A1, May 20, 2021
Int. Cl. H02K 3/52 (2006.01); H02K 1/16 (2006.01); H02K 3/38 (2006.01); H02K 3/50 (2006.01); H02K 15/24 (2025.01)
CPC H02K 3/522 (2013.01) [H02K 1/16 (2013.01); H02K 3/38 (2013.01); H02K 3/50 (2013.01); H02K 15/24 (2025.01)] 9 Claims
OG exemplary drawing
 
1. A winding head for a stator tooth of an electric motor, a stator core of the stator tooth having a first stator flange and a second stator flange that are joint by a stator joint part, wherein the stator core further has an I-shaped cross section perpendicular to a longitudinal elongation with a first end and a second end, the winding head being configured to extend the longitudinal elongation at the first end, the winding head comprising:
a first winding head flange and a second winding head flange that are joined by a winding head joint part, the winding head extending at least partially an elongation of a shape of the stator core;
a winding hole extending through a body of the first winding head flange, and a winding opening at the winding head joint part, the winding hole and the winding opening being connected by a groove in the winding head joint part; and
a bridging part with a reduced thickness in a direction of a longitudinal elongation of the winding head joint part regarding a thickness of the first winding head flange, the bridging part extending between an outer surface of the first winding head flange and the winding hole in a direction perpendicular to the longitudinal elongation of the winding head joint part,
wherein the winding hole extends through the body of the first winding head flange in a direction parallel with the longitudinal elongation of the winding head joint part, and
wherein the bridging part partially defines a groove in the first winding head flange, the groove in the first winding head flange extending between the outer surface of the first winding head flange and the winding hole.