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AssigneeGeneral Electric Company
InventorsManoj R. Shah, Sameh R. Salem, Gerald Burt Kliman, Luana Emiliana Iorio, Judson Sloan Marte, Russell Walthers
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An electrical machine stator core and method for reducing electromagnetic losses and the consequent heating of the core. The stator core makes use of laminations made from an iron-aluminum alloy at the core-ends of the core, while laminations between the core-ends are formed of a ferromagnetic alloy different from the iron-aluminum alloy. Use of iron-aluminum alloy laminations at the core-ends makes possible a relatively simple technique for generator uprate, by removing laminations located at the core-ends of the stator core, and then installing replacement laminations formed of the iron-aluminum alloy at the core-end, again with the result that the laminations located at the core-ends are formed of an Fe—Al alloy that is different from the alloy of the laminations between the core ends.
a stator core for an electric machine, the stator core comprising a plurality of axially-aligned laminations, each of the laminations having an annular shape defining an outer circumference and an inner circumference, the stator core having oppositely-disposed core-ends and an intermediate portion therebetween, the laminations defining the core-ends being formed of an iron-aluminum alloy, at least one of the laminations defining the intermediate portion being formed of a ferromagnetic alloy different from the iron-aluminum alloy.
A stator core installed in a dynamoelectric machine, the stator core having an annular shape defining an outer circumference and an inner circumference receiving a rotor of the dynamoelectric machine, the stator core comprising a plurality of axially-aligned laminations, each of the laminations having an annular shape defining an outer circumference and an inner circumference corresponding to the outer and inner circumferences, respectively, of the stator core, the stator core having oppositely-disposed core-ends and an intermediate portion therebetween, the laminations defining the core-ends being formed of an iron-aluminum alloy containing about 2 to about 16 weight percent aluminum, the laminations defining the intermediate portion being formed of a ferromagnetic alloy different from the iron-aluminum alloy.
A method of retrofitting a stator core of an electric machine, the stator core comprising a plurality of axially-aligned laminations formed of a ferromagnetic alloy, each of the laminations having an annular shape defining an outer circumference and an inner circumference, the stator core have oppositely-disposed core-ends and an intermediate portion therebetween, the method comprising the steps of:
A method of retrofitting a stator core of a dynamoelectric machine, the stator core having an annular shape defining an outer circumference and an inner circumference adapted for receiving a rotor of the dynamoelectric machine, the stator core comprising a plurality of axially-aligned laminations formed of a ferromagnetic alloy, each of the laminations having an annular shape defining an outer circumference and an inner circumference corresponding to the outer and inner circumferences, respectively, of the stator core, the stator core having oppositely-disposed core-ends and an intermediate portion therebetween, the method comprising the steps of:
Dependencies are inferred from the claim text.