CHAMBER FOR CONDUCTORS OF ELECTRIC MACHINES

• US 20150340918A1
• Filed: 05/19/2015
• Published: 11/26/2015
• Est. Priority Date: 05/26/2014
• Status: Active Grant

• Current Assignee: General Electric Technology GmbH (General Electric Company)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: BIALIK, Janusz, CLEMENCE, Laurent Didier Jean, MADLE, Duncan, SIMON, Jean-Noel, ANA, Cristian
• Granted Patent: US 10,014,740 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B23K 1/0016 Brazing of electronic components
• CPC Class Codes: H02K 15/0093 Manufacturing or repairing cooling fluid boxes, i.e. terminals of fluid cooled windings ensuring both electrical and fluid connection
• CPC Class Codes: H02K 15/04 of windings, prior to mounting into machines insulating windings H02K15/10, H02K15/12
• CPC Class Codes: H02K 3/22 consisting of hollow conductors
• CPC Class Codes: H02K 9/00 Arrangements for cooling or ventilating channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24

Abstract

The present disclosure relates to a chamber for housing strands of a stator bar for electric machines.

The problem to provide a reliable chamber for a stator bar of an electric machine is solved with a stator bar chamber engaging a stator bar in an electric machine. The chamber includes a number of hollow conductors in a first straight part of the chamber, a number of hollow conductors in a second tapered part, and a number of hollow conductors and adjacent solid conductors in a third straight part. The first part of the chamber is closed with a ring mounted at the edge of the first part and a nipple adapted to the ring.

Claims

1. A stator bar chamber engaging a stator bar in an electric machine, the chamber comprising a number of hollow conductors in a first straight part of the chamber, a number of hollow conductors in a second tapered part, and a number of hollow conductors and adjacent solid conductors in a third straight part, wherein the first part of the chamber is closed with a ring mounted at the edge of the first part and a nipple adapted to the ring, wherein an essential part or the whole part of the first part is brazed in a first brazing zone to thereby electrically connect the hollow conductors and an essential part or the whole part of the third part is brazed in a second brazing zone to thereby create a watertight part.

2. The stator bar chamber according to claim 1, wherein the ring is made from copper and the nipple is made from stainless steel.

3. The stator bar chamber according to claim 1, wherein the ring is brazed to the edge of the first part.

4. A bi-metallic composition from a ring from one metal and a nipple from a different metal for a stator bar chamber according to claim 1.

5. A manufacturing method for a stator bar chamber comprising:

arranging a number of hollow conductors in a first straight part of the chamber, arranging the number of hollow conductors in a second tapered part of the chamber, and arranging the number of hollow conductors and adjacent solid conductors in a third straight part of the chamber, closing the first part of the chamber with a ring by mounting the ring at the edge of the first part and adapting a nipple to the ring.

6. The method according to claim 5, wherein sequent steps of first brazing the ring to the nipple, second brazing conductors of the stator bar to the chamber simultaneously, third brazing the nipple to the protruding part of the first part of the chamber.