Bolted spherical series/phase generator connections

• US 4,894,575 A
• Filed: 11/07/1988
• Issued: 01/16/1990
• Est. Priority Date: 11/07/1988
• Status: Expired due to Term

• Current Assignee: Siemens Power Generation, Inc.
• Original Assignee: Westinghouse Electric Company LLC (Brookfield Asset Management Incorporated)
• Inventors: Morrison, Darrell R., Ponce, Hector O., Butler, John M. III, Nilsson, Lennart S.
• Primary Examiner(s): Salce, Patrick R.
• Assistant Examiner(s): Rebsch, D. L.
• Application Number:
  US07/268,103
• Time in Patent Office: 435 Days
• Field of Search: 29/596, 310/42, 310/71, 310/91, 310/260, 248/74.4, 248/231.6, 248/316.6, 439/798
• US Class Current: 310/260
• CPC Class Codes: H02K 3/505 for large machine windings, e.g. bar windings H02K3/51 takes precedence

Abstract

An electrical generator connection, to connect coil ends, and a method of making the same. A header cap having a spherically shaped portion is brazed to each coil end to be connected. A pair of connector bars, each having a pair of similarly sized spherical seats, receives the spherical portion of each coil end header cap. Electrical and mechanical connection is provided by bolting the two connector bars together.

Claims

1. An electrical generator comprising connectors which connect coil ends, said coil ends having a spacing therebetween and respective axes of projection, each of said connectors being characterized by:

first and second header caps having a predetermined geometry attached to respective ends of a pair of coil sections;

a first connector bar of a conductive material, said first bar having two detents of a spacing equal to said coil end spacing, said first connector bar detents having a respective axis corresponding to said axis of projection;

a second connector bar of a conductive material, said second bar having two detents of a spacing equal to said coil end spacing, said second connector bar detents having a respective axis corresponding to said axis of projection;

said first connector bar detents and said second connector bar detents defining two openings of a geometry complimentary to said predetermined geometry and a spacing equal to said coil end spacing;

wherein said first and second header caps include a projecting spherical part, said first and said second connector bar detents each including a spherically shaped seat having widened portions at the periphery thereof, whereby said defined openings include spherically shaped portions for receiving said projecting spherical parts of said header caps; and

clamping means for clamping said first and second connector bars together so that said header caps are tightly received in said defined openings.

2. The electrical generator as described in claim 1, further comprising a respective water hose nipple integrally connected to each of said header caps.

3. In an electrical generator having stator coil sections, connectors connecting pairs of said coil sections at their ends, said ends having a spacing therebetween and respective axes of projection, and means for mechanically connecting at least one of said connectors to the end of each coil section of its pair, the improvement wherein at least one of said connectors comprises a solid bar of a conductive material, said bar having two detents of a spacing equal to said coil end spacing, said detents having an axis corresponding to said axis of projection, said coil ends each having a header cap terminating in a spherical portion, each of said detents tightly receiving said predetermined geometry portion of one of said header caps.

4. The electrical generator as described in claim 3, wherein said mechanical means comprise a pair of bolts, each bolt corresponding to one of said header caps, wherein each of said spherical geometry portions is provided with a bolt receiving opening and said connector bar is provided with a pair of bolt receiving openings, each bolt receiving opening passing through one of said detents, said bolts securing said bar to said header caps.