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Minimizing electric bearing currents in ASD systems

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1 Author(s)
Link, P.J. ; ABB Autom. Inc., USA

During recent years, an increase in bearing failures has been seen in ASD-fed electric motors, as well as in gearboxes, and other connected machinery, caused by electric current flow through such bearings. The theories presented in this paper focus on bearing currents in ASDs of the voltage source pulse width modulated (PWM) type, for use with AC induction motors, although the concepts are applicable to various types AC and DC drive systems

Published in:

Industry Applications Magazine, IEEE  (Volume:5 ,  Issue: 4 )