Metal working – Method of mechanical manufacture – Electrical device making
Patent
1997-09-16
2000-07-18
Cuda, Irene
Metal working
Method of mechanical manufacture
Electrical device making
310211, 310 42, H02K 1502
Patent
active
060889063
ABSTRACT:
A method of making a squirrel cage rotor of copper material for use in AC or DC motors, includes forming a core with longitudinal slots, inserting bars of conductive material in the slots, with ends extending out of opposite ends of the core, and joining the end rings to the bars, wherein the conductive material of either the end rings or the bars is copper. Various methods of joining the end rings to the bars are disclosed including friction welding, current pulse welding and brazing, transient liquid phase joining and casting. Pressure is also applied to the end rings to improve contact and reduce areas of small or uneven contact between the bar ends and the end rings. Rotors made with such methods are also disclosed.
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Franco-Ferreira Edgard A.
Hsu John S.
Blount Steven A
Cuda Irene
UT-Battelle LLC
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