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US 11,894,724 B2Granted
Alternator with rotor lamination stack
AssigneeGenerac Power Systems, Inc.
InventorDavid William Pollock
Life of this patent
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Abstract
A rotor core lamination is provided. The rotor core lamination includes a plurality of salient poles. Each of the salient poles includes: 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.
Claims14
A rotor core lamination comprising:
- 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 rotor core lamination is arranged and configured to operate with a stator, the stator comprising a plurality of stator slots arranged to accommodate stator windings, wherein the plurality of salient poles includes a first salient pole and a second salient pole, the first salient pole being next to the second salient pole, and wherein the central point of the pole shoe arc of the first salient pole is offset with respect to the central axis of the first salient pole by one quarter of a stator slot pitch toward the second salient pole, and the central point of the pole shoe arc of the second salient pole is offset with respect to the central axis of the second salient pole by one quarter of the stator slot pitch toward the first salient pole.
2 more elements
A rotor comprising:
- 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;
- 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, 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.
6 more elements
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.
9 more elements
Dependencies are inferred from the claim text.