Title :
Bearing current remediation options
Author :
Schiferl, R.F. ; Melfi, M.J.
Author_Institution :
Rockwell Autom., Greenville, SC, USA
Abstract :
The vast majority of bearing failures in electric motors and electric motor-driven equipment are due to mechanical and thermal causes. Bearing current in induction motor can result in premature bearing failure. Proper remediation methods depend upon a thorough understanding of the potential current paths in a given installation. Diagrams of current flow paths were presented here to illustrate potential issues. Proper grounding is a key to shunting currents away from paths that flow through motor or driven equipment bearings.
Keywords :
failure analysis; induction motor drives; machine bearings; bearing current; current flow paths; electric motor-driven; electric motors; grounding; induction motor; potential current paths; premature bearing failure; remediation methods; Current measurement; Electric motors; Grounding; Induction motors; Insulation; Lubrication; Pollution measurement; Pulse width modulation inverters; Vibrations; Voltage;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/MIA.2004.1311162
