Chamber for conductors of electric machines

• US 10,014,740 B2
• Filed: 05/19/2015
• Issued: 07/03/2018
• Est. Priority Date: 05/26/2014
• Status: Active Grant

• Current Assignee: General Electric Technology GmbH (GE Aerospace)
• Original Assignee: General Electric Technology GmbH (GE Aerospace)
• Inventors: Bialik, Janusz, Clemence, Laurent Didier Jean, Madle, Duncan, Simon, Jean-Noel, Ana, Cristian
• Primary Examiner(s): Phillips, Forrest M
• Application Number:
  US14/715,921
• Publication Number:
  US 20150340918A1
• Time in Patent Office: 1,141 Days
• Field of Search: 310 54, 310201
• 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:

an interior area defined by the chamber for housing conductors within the interior area;

a number of hollow conductors housed within a first straight part of the chamber, housed within a second tapered part of the chamber, and housed within a third straight part of the chamber;

a number of solid conductors housed within the third straight part of the chamber adjacent the number of hollow conductors;

a ring mounted with a portion of the ring within the first straight part of the chamber and a portion of the ring abutting an outer free end of the first straight part of the chamber;

a nipple comprising a connection portion with an outer cross-section of the connection portion connected within and to an inner cross-section of the ring;

a first brazing zone in a part or in a whole of the first straight part of the chamber with brazing electrically connecting the number of hollow conductors; and

a second brazing zone in a part or in a whole of the third straight part of the chamber with brazing creating a watertight third straight part of the chamber.

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 outer free end of the first straight part of the chamber.

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

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

providing an interior area defined by the chamber for housing conductors;

arranging a number of hollow conductors within a first straight part of the chamber;

arranging the number of hollow conductors within a second tapered part of the chamber;

arranging the number of hollow conductors and adjacent solid conductors within a third straight part of the chamber;

connecting to the first straight part of the chamber a ring with a first portion of the ring arranged within the first straight part of the chamber and a second portion of the ring abutting an outer free end of the first straight part of the chamber; and

connecting to the ring a nipple comprising a connection portion with an outer cross-section sized to connect within and to an inner cross-section of the ring.

6. The method according to claim 5, further comprising:

brazing the ring to the nipple;

brazing the number of hollow conductors and adjacent solid conductors to the third straight part of the chamber; and

brazing the brazed nipple and ring to the first straight part of the chamber.