Composite slot insulation for dynamoelectric machine

• US 4,560,896 A
• Filed: 10/01/1984
• Issued: 12/24/1985
• Est. Priority Date: 10/01/1984
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Derderian, Scott K., Vogt, George H.
• Primary Examiner(s): Thomas, Alexander S.
• Application Number:
  US06/656,571
• Time in Patent Office: 449 Days
• Field of Search: 428/122, 428/140, 428/137, 428/138, 310/215
• US Class Current: 310/215
• CPC Class Codes: H02K 3/345 between conductor and core, e.g. slot insulation
• CPC Class Codes: Y10S 174/19 in a dynamo-electric machine
• CPC Class Codes: Y10T 428/24198 Channel-shaped edge component [e.g., binding, etc.]
• CPC Class Codes: Y10T 428/24322 Composite web or sheet
• CPC Class Codes: Y10T 428/24331 including nonapertured component
• CPC Class Codes: Y10T 428/24347 From both sides

Abstract

In a dynamoelectric machine, the rotor comprises a solid steel drum formed with axially extending channels which carry electrically-conductive windings. These windings are electrically insulated from the rotor body by so-called slot insulation. The present invention proposes an integrally formed composite insulation comprising aramid paper slot armor and an epoxy-glass sub-slot cover.

Claims

1. A composite slot armor and sub-slot cover for a dynamoelectric machine comprising:

slot armor including a "U"-shaped aramid paper channel having a base portion including a plurality of axially spaced apart holes formed therethrough;

a sub-slot cover including epoxy-glass layers formed integrally with the base portion of the "U"-shaped channel; and

,

axially elongated ventilation slots formed through the base portion and the epoxy-glass layers.

2. The composite article recited in claim 1 wherein the epoxy-glass layers are on each side of the base portion sandwiching the base portion therebetween.

3. The composite article recited in claim 1 wherein the aramid paper is Nomex.

4. The composite article recited in claim 3 wherein the epoxy-glass is Scotchply.

5. A composite slot armor and sub-slot cover for a dynamoelectric machine rotor having a plurality of axially extending slots each slot having radially extending sidewalls;

the slot armor and sub-slot cover comprising;

slot armor including a "U"-shaped aramid paper channel; and

,

a sub-slot cover including epoxy-glass layers formed integrally with an axially extending base portion of the slot armor;

the base portion of the slot armor formed with spaced-apart holes allowing bonding between the epoxy-glass layers.

6. The article recited in claim 5 wherein the base portion of the slot armor and the epoxy-glass layers are formed with axially elongated ventiliation slots.