The Challenge VFD Motor Face

  VFD creates harmful stray currents that travel down the shaft and discharge through the bearings.

   VFD induce high frequency voltages on the motor shaft.

  Bearing damage due to EDM is becoming a leading cause of motor   failure, many cases remain undiagnosed.

    
Effects of EDM

Fusion craters, pitting, frosting, fluting

Excessive vibration

Noise

Bearing failure