Adam Willwerth is marketing manager for Electro Static Technology, which manufactures the AEGIS SGR bearing protection ring. For more information, visit www.est-aegis.com.
All major manufacturers of three-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.