Method for repairing stator winding bars
US5557837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1995 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Apr 3, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49742
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The method for repairing a connecting device for the electrical connection and for supplying and carrying away the coolant to and from the hollow conductor elements of the stator winding bars of electrical machines includes removal of the existing connecting device (2) from the bar end by inductive heating; cleaning the bar end in the region where the new connecting device is intended to be mounted; material-cutting machining the end surface of the bar end; introducing narrow slots (7) between adjacent conductor elements (1) into the end of the bar in the transverse and vertical directions; pushing on a first connecting part (2a) which is made of copper and completely surrounds the bar end; filling remaining gaps between the first connecting part (2a) and the outer surfaces of the bar end with copper foil and/or solder foil; filling the narrow slots (7) with copper foil and/or solder foil (10) or a combination of both; inductive heating of the first connecting part (2a) and of the bar end and soldering with the addition of solder; inspecting the solder joint thus created; fitting a second connecting part (2b) made of copper to the free end surface of the first connecting part (2a) …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.