Patent ID: 11894724
Assignee: GENERAC POWER SYSTEMS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A synchronous electrical machine comprising:
a stator comprising a plurality of stator slots arranged to accommodate stator windings;
a rotor inside the stator, wherein the rotor comprises:
a lamination stack comprising a plurality of rotor core laminations, wherein the plurality of rotor core laminations are unskewed; and
main field windings accommodated on the lamination stack; and
wherein each of the plurality of rotor core laminations comprises:
a plurality of salient poles, each of the salient poles comprising:
a pole body having a central axis in a radial direction of the rotor core lamination; and
a pole shoe extending radially outward from the pole body, wherein the pole shoe has a pole shoe arc, and a central point of the pole shoe arc is offset from the central axis

wherein the plurality of salient poles include a first salient pole and a second salient pole, the first salient pole being next to the second salient pole, and the central point of the pole shoe arc of the first salient pole being offset with respect to the central point of the pole shoe arc of the second salient pole, wherein the offset of the central point of the pole shoe arc of the first salient pole with respect to the central point of the pole shoe arc of the second salient pole results in an angular displacement of a half stator slot pitch.