High strength induction machine, rotor, rotor cage end ring and bar joint, rotor end ring, and related methods
First Claim
1. An apparatus comprisinga stator having a stator frame, a stator core positioned in the stator frame, and a stator winding positioned in the stator frame;
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1 Assignment
0 Petitions
Accused Products
Abstract
A high strength induction machine, rotor, rotor cage end ring and bar joint, rotor end ring, and related methods are provided. An embodiment of an end ring and bar joint includes a main body adapted to substantially surround a rotor shaft when mounted thereto, a plurality of slots extending inwardly in a radial direction from outer peripheries of the main body, a thicker end ring section extending outwardly from a medial portion of the main body, being thicker than the outer peripheries of the main body, and also being adapted to substantially surround the rotor shaft, and a plurality of bosses extending axially and outwardly from outer peripheral portions in a direction opposite to the thicker end ring section and each adapted to receive an end portion of a rotor bar therein.
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Citations
16 Claims
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1. An apparatus comprising
a stator having a stator frame, a stator core positioned in the stator frame, and a stator winding positioned in the stator frame; - and
a rotor associated with the stator and including a rotor shaft, a rotor cage assembly substantially surrounding at least portions of the rotor shaft, the rotor cage assembly including a rotor core having a plurality of laminations defining a stack, a plurality of rotor bars associated with the plurality of laminations, a pair of an end lamination plates positioned along opposing ends of the stack and associated with the plurality of rotor bars, a pair of end rings each positioned adjacent one of the pair of end lamination plates and connected to each of the plurality of rotor bars, and a pair of spacer plates each positioned between one of the pair of end lamination plates and one of the pair of end rings, each of the pair of end rings having a plurality of slots extending inwardly in a radial direction from outer peripheries of the end ring toward a medial portion of the end ring and a plurality of bosses extending axially and outwardly from outer peripheral portions toward one of the pair of end lamination plates, the medial portion of each of the pair of end rings including a thicker end ring section extending outwardly and axially away from the spacer plate and being thicker than the outer peripheral portions. - View Dependent Claims (2, 3, 4, 5)
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6. A rotor for an induction machine, the rotor comprising:
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a rotor shaft; and a rotor cage assembly substantially surrounding at least portions of the rotor shaft, the rotor cage assembly including a rotor core having a plurality of laminations defining a stack, a plurality of rotor bars associated with the plurality of laminations, a pair of an end lamination plates positioned along opposing ends of the stack and associated with the plurality of rotor bars, a pair of end rings each positioned adjacent one of the pair of end lamination plates and connected to each of the plurality of rotor bars, and a pair of spacer plates each positioned between one of the pair of end lamination plates and one of the pair of end rings, each of the pair of end rings having a plurality of slots extending inwardly in a radial direction from outer peripheries of the end ring toward a medial portion of the end ring and a plurality of bosses extending axially and outwardly from outer peripheral portions toward one of the pair of end lamination plates, the medial portion of each of the pair of end rings including a thicker end ring section extending outwardly and axially away from the spacer plate and being thicker than the outer peripheral portions, the combination of one of the pair of end lamination plates, one of the pair of spacer plates, and one of the pair of end rings having the plurality of bosses defining an end ring and bar joint of the rotor. - View Dependent Claims (7, 8, 9, 10)
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11. An end ring for a rotor of an induction machine, the end ring comprising:
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a main body adapted to substantially surround a rotor shaft when mounted thereto; a plurality of slots extending inwardly in a radial direction from outer peripheries of the main body; a thicker end ring section extending outwardly from a medial portion of the main body, being thicker than the outer peripheries of the main body, and also being adapted to substantially surround the rotor shaft; and a plurality of bosses extending axially and outwardly from outer peripheral portions in a direction opposite to the thicker end ring section and each adapted to receive an end portion of a rotor bar therein. - View Dependent Claims (12, 13, 14)
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15. A method of assembling a rotor, the method comprising:
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positioning a plurality of substantially cylindrical shaped rotor bars through a plurality of laminations which define a stack and to substantially surround a rotor shaft so that end portions of each of the plurality of rotor bars extends outwardly from opposing ends of the stack; positioning an end lamination plate having a plurality of annular-shaped openings extending along outer peripheries thereof onto each of the end portions of the plurality of rotor bars; positioning an end ring including a plurality of bosses extending outwardly toward the end lamination plate along opposing ends of the stack so that each of the plurality of bosses receives an end portion of one of the plurality of rotor bars; and positioning a spacer plate between each of the end lamination plate and the end ring positioned along the opposing ends of the stack. - View Dependent Claims (16)
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Specification