Keybar voltage and current reduction for a power generator assembly
AssigneeGeneral Electric Company
InventorsManoj R. Shah, Sameh R. Salem
Life of this patent
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Abstract
A power generator that operates at a reduced keybar voltages and currents, flange currents, and keybar voltage differentials includes a keybar shield that reduces the amount of magnetic flux coupling into a keybar of multiple keybars during operation of the generator. By reducing the amount of coupled flux, the keybar shield reduces a keybar voltage and a keybar current in a keybar, reduces keybar current flowing into a flange, and reduces a voltage differential between voltages induced by the flux in the multiple keybars.
Claims48
A keybar voltage and current reduction apparatus for use in a power generator comprising a stator having an outer surface, a plurality of keybars coupled to the outer surface, and a stator core, the keybar voltage and current reduction apparatus comprising:
- a plurality of keybar shields for the coupling of a magnetic field, each keybar shield being mechanically coupled to the outer surface of the stator, each keybar shield being an electrical conductor;
- and
- a keybar shunt electrically coupling at least two of the keybar shields, the keybar shunt being flexible for expanding and contracting during operation of the power generator, the keybar shunt being an electrical conductor.
A power generator comprising:
- a stator having an outer surface and a stator core;
- a rotor rotatably disposed inside of the stator;
- a plurality of keybars mechanically coupled to the outer surface of the stator;
- a plurality of keybar shields mechanically coupled to an outer surface of the stator, each keybar shield being an electrical conductor;
- and
- a keybar shunt electrically coupling at least two of the keybar shields, the keybar shunt being flexible for expanding and contracting during operation of the power generator, the keybar shunt being an electrical conductor;
- wherein a rotation of the rotor induces a magnetic field that is coupled into the keybar shields, and wherein a magnetic field that is coupled into a keybar of the plurality of keybars is less a magnetic field that would be coupled into the keybar in the absence of the keybar shields.
A keybar voltage and current reduction apparatus for use in a power generator comprising a stator having an outer surface, a stator core having a pair of axial ends, and a plurality of keybars coupled to the outer surface of the stator, the keybar voltage and current reduction apparatus comprising:
- a plurality of electrically conductive keybar shields coupled to the outer surface of the stator;
- and
- a keybar shunt electrically coupling at least two of the keybar shields, the keybar shunt being disposed between the axial ends of the stator core.
A power generator comprising:
- a stator having a stator core, the stator core having a pair of axial ends;
- a plurality of keybars coupled to an outer surface of the stator;
- a plurality of electrically conductive keybar shields coupled to the outer surface of the stator;
- and
- a keybar shunt electrically coupling at least two of the keybar shields, the keybar shunt being disposed between the axial ends of the stator core.
Dependencies are inferred from the claim text.