Metal working – Method of mechanical manufacture – Electrical device making
Patent
1995-04-03
1996-09-24
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
2940205, 2940216, 228165, 228170, 310 54, 310 60A, H02K 1514
Patent
active
055578373
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) by soldering; and testing the sealing of the resulting connecting device (2a,2b).
REFERENCES:
In-Place Brazing Solution To Liquid Cooled Stator Winding Leaks, James K. Taillon et al, Mechanical Dynamics and Analysis (MDA), pp. 1-5.
Thiard-Laforet Alfred
Zerlik Wilibald
ABB Management AG
Hall Carl E.
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