Amortisseur assembly extended service life upgrade for salient pole synchronous motors
AssigneeNew York Power Authority
InventorAsif Khokhar
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Abstract
The present invention is an amortisseur upgrade which augments features of the traditional amortisseur. By introducing four features, the aggressive differential thermal growth, due to an excessive power onrush, beyond the intended design duty, during generator startup, is managed. The upgrades include: shallow clearance counter-bores in the generator end cap, flexible shorting plates, hollow damper rod ends, and spacers which are integrated into the shorting plates. These features, when implemented into the traditional amortisseur, manage the aggressive thermal growth response of the amortisseur assembly.
Claims19
An amortisseur assembly for a salient pole synchronous motor, comprising:
- a shorting plate having a first surface and a second surface extending horizontally between a pair of ends;
- a plurality of apertures extending from the first surface to the second surface;
- wherein each of the apertures has a circumference on the second surface;
- and
- an appendage protruding vertically from the circumference on the second surface;
- wherein the aperture extends through the appendage;
- wherein each appendage has a first region and a second region;
- wherein the first region connects the appendage to the second surface and the second region is tapered away from the second surface.
An amortisseur assembly for a salient pole synchronous motor, comprising:
- a pair of curved shorting plates having a first surface and a second surface extending horizontally between a pair of ends;
- a plurality of apertures extending from the first surface to the second surface;
- wherein each of the apertures has a circumference on the second surface;
- an appendage protruding vertically from the circumference on the second surface;
- wherein the aperture extends through the appendage;
- wherein each appendage has a first region and a second region;
- wherein the first region connects the appendage to the second surface and the second region is tapered away from the second surface;
- an opening in at least one end of each plate;
- wherein the opening extends from the first surface to the second surface;
- and
- a plurality of damper rods extending between the curved plates.
An amortisseur assembly for a salient pole synchronous motor, comprising:
- a pair of curved shorting plates having a first surface and a second surface extending horizontally between a pair of ends;
- a plurality of apertures extending from the first surface to the second surface;
- wherein each of the apertures has a circumference on the second surface;
- an appendage protruding vertically from the circumference on the second surface;
- wherein the aperture extends through the appendage;
- wherein each appendage has a first region and a second region;
- wherein the first region connects the appendage to the second surface and the second region is tapered away from the second surface;
- an opening in at least one end of each plate;
- wherein the opening extends from the first surface to the second surface;
- a plurality of parallel solid damper rods extending between the curved plates;
- wherein the rods are connected within the apertures of the curved plates;
- wherein each rod has a pair of ends;
- and
- a counter bore in each end of each rod.
Dependencies are inferred from the claim text.