Method for connecting dynamoelectric machine coils

• US 4,056,880 A
• Filed: 07/09/1976
• Issued: 11/08/1977
• Est. Priority Date: 07/09/1976
• Status: Expired due to Term

• Current Assignee: Westinghouse Electric Corporation (Paramount Global (f/k/a ViacomCBS Inc.))
• Original Assignee: Westinghouse Electric Corporation (Paramount Global (f/k/a ViacomCBS Inc.))
• Inventors: Stewart, Richard E.
• Primary Examiner(s): Hall, Carl E.
• Application Number:
  US05/703,738
• Time in Patent Office: 487 Days
• Field of Search: 29/596, 228/139, 228/140, 228/180 R, 228/190, 174/94 R, 310/71, 310/260
• US Class Current: 29/596
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 3/505 for large machine windings, e.g. bar windings H02K3/51 takes precedence
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine

Abstract

A connector assembly for joining two half coils conductors in the form of straps are joined at one end in electrical contact with the header caps of two water cooled half coils. The unattached ends of each group of conductor straps are tinned with soft solder and interleaved with the straps of the other group. A plate is disposed on both sides of the interleaved joint and a bolt is inserted through both plates and the interleaved joint. The bolt is tightened to produce compressive union between the interleaved straps for good electrical contact. The joint is heated to coalesce the solder with the conductor straps thereby forming a metallurgical bond. The bolt is then torqued to reestablish the initial tightness to ensure a good mechanical and metallurgical joint.

Claims

1. A method of joining the end portions of a selected pair of half coils of a dynamoelectric machine one to another thereby establishing a mechanical and electrical union between the end portions of said selected pair of coils by means of a plurality of electrical conductors, each of said conductors including first and second end portions, said method comprising:

a. connecting the first end portion of each of a plurality of electrical conductors in electrical contact with a selected one of said half coil end portions;

b. connecting the first end portion of each of a second plurality of electrical conductors in electrical contact with the remaining half coil end portion of said selected pair of coils;

c. interleaving the second electrical conductor end portions of said first and second plurality of electrical conductors in electrical contact, one with another;

d. forming a metallurgical bond between said interleaved electrical conductor end portions;

e. compressing the interleaved electrical conductor end portions sufficiently to provide electrical integrity after said conductor end portions have been metallurgically bonded; and

f. securing the interleaved electrical conductor end portions to maintain said compression.

2. The method of claim 1 further comprising:

compressing said interleaved electrical conductor end portions after interleaving said electrical conductor second end portions and before forming said metallurgical bond.