US 12,308,720 B2
Wedge element for an electric excited rotor
Christian Finger-Albert, Erlangen (DE)
Assigned to Valeo eAutomotive Germany GmbH, Erlangen (DE)
Filed by Valeo eAutomotive Germany GmbH, Erlangen (DE)
Filed on Dec. 23, 2022, as Appl. No. 18/146,047.
Claims priority of application No. 21217514 (EP), filed on Dec. 23, 2021.
Prior Publication US 2023/0208236 A1, Jun. 29, 2023
Int. Cl. H02K 3/34 (2006.01); H02K 1/26 (2006.01)
CPC H02K 3/345 (2013.01) [H02K 1/26 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotor for a rotary electric machine, the rotor comprising:
a rotor shaft configured to rotate around an axis of rotation;
a rotor body formed of a stack of laminations having a plurality of teeth projecting radially, the rotor body being mounted coaxially on the rotor shaft;
a field coil wound around each tooth of the plurality of teeth;
a plurality of wedge elements extending axially and arranged in slots corresponding to space between two adjacent teeth of the plurality of teeth, each wedge element of the plurality of wedge elements having two lateral sides configured to come against respectively a corresponding tooth of the respective two adjacent teeth;
wherein a convex portion and a projecting portion adjoining the convex portion are arranged on each one of the two lateral sides of the corresponding wedge element, the convex portion complementing a corresponding concave portion of the corresponding tooth, the projecting portion coming against a corresponding protruding portion of the corresponding tooth, the projecting portion being configured to exert a pressing force on the protruding portion, the pressing force having a force component being opposite to a directly normal direction to a contact surface between the convex portion and the concave portion such that to press the convex portion against the concave portion.