Archive > 2012 > August 2012 > Bearing Protection Needed if Inverter-Duty Motors Are to Live up to their Name

Bearing Protection Needed if Inverter-Duty Motors Are to Live up to their Name - August 2012

Adam Willwerth

The article "Bearing Protection Needed if Inverter-Duty Motors Are to Live up to their Name" appeared in the August 2012 issue of Power Transmission Engineering.

Summary
All major manufacturers of 3-phase AC induction motors offer "inverter-duty" or "inverter-ready” models, but while these motors have inverter-rated insulation to protect the windings, the bearings--their most vulnerable parts--are too often ignored.

Keywords
bearings, grounding, variable frequency drives, motor failure, shaft grounding, Electro Static Technology, Aegis ring

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