Motor Bearing Current Issues

Part 1 of a 2 Part Series on Motor Bearing Current Failures More and more motors these days are being controlled by variable frequency drives. Often, the drives result in premature bearing failure due to stray currents. These currents result from the common mode voltage produced by the drive. As seen in the figure above, […]

Prevent Downtime with Electrical Bearing Protection

In today’s energy conscious world more and more motors are being operated with variable frequency drives.  Drives provide large energy savings, reduced inrush current and precise speed control.  However, VFDs do have their drawbacks.  Chief among these drawbacks is electrical bearing damage caused by stray shaft currents.  This damage manifests itself in the form of […]