If Your Motor Is On a VFD, Squealing May Be Electrical Fluting Damage

Shaft Voltage from VFDs Damages Bearings - watch the video to see the shaft voltage that causes pitting in the motor's bearings and eventual fluting and failure.

PROBLEM: Motor with No Bearing Protection...

Variable frequency drives (VFDs) on AC and DC motors create harmful electrical voltages on the motor shaft. If these voltages build up high enough, they discharge through the motor's bearings, causing fusion craters, severe pitting, and fluting. Excessive bearing noise and eventually bearing failure is the result.

 

SOLUTION: Motor with AEGIS Shaft Grounding Ring

The AEGIS® Shaft Grounding Ring prevents electrical bearing damage by giving a path of least resistance to harmful shaft voltage, so they discharge through the ring, instead of through the bearings. The AEGIS Ring's conductive microfibers™ provide the most reliable and long-lived current diversion of any shaft grounding system.

For more information, download or request a print copy of the AEGIS Bearing Protection Handbook of best practices for bearing protection.

AEGIS: Let us be your partner improving electric motor service life