Electrofriction method of manufacturing squirrel cage rotors
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 electrofriction 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.
- Inventors:
- Issue Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1175309
- Patent Number(s):
- 6877210
- Application Number:
- 10/345,550
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B22 - CASTING B22D - CASTING OF METALS
H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
- DOE Contract Number:
- AC05-00OR22725
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Hsu, John S. Electrofriction method of manufacturing squirrel cage rotors. United States: N. p., 2005.
Web.
Hsu, John S. Electrofriction method of manufacturing squirrel cage rotors. United States.
Hsu, John S. Tue .
"Electrofriction method of manufacturing squirrel cage rotors". United States. https://www.osti.gov/servlets/purl/1175309.
@article{osti_1175309,
title = {Electrofriction method of manufacturing squirrel cage rotors},
author = {Hsu, John S.},
abstractNote = {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 electrofriction 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {4}
}
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