Home » FAQ » Can I detect VFD-controlled motor bearing defected before it failed?

Can I detect VFD-controlled motor bearing defected before it failed?

If the bearing of the motor defected, how to know that? If I used output filter its reduce the effect of defect?

Bearing failure is caused by electrostatic discharge arcing. It is difficult to predict if this will happen, and it's generally a problem only in larger motors, but that's not a guarantee it won't happen in smaller ones. Typically you won't know you have a problem until it causes a bearing failure.

Typically it is recommended that inverter-duty motors have at least one bearing insulated from the motor frame to prevent circulating currents between the frame and rotor, usually the opposite-shaft-end bearing. Alternately, a brush assembly can be installed in the motor to ride on the motor shaft and give a better path for the circulating current than through the bearings. Ideally, insulating both bearings should solve the problem. Attention should be paid to properly grounding everything in the system to help prevent the problem, also.

Post a Comment:

    
Plz Calculate (6 - 8) =
(Your comment will show after approved.)

You may also like:

Featured Articles
Non-Enclosure Variable Frequency Drive ... Non-Enclosure Variable Frequency Drive (VFD)No enclosure (cover), reducing installation space and cost effective. Widely used in All-In-One control cabinet. Keep the same ...
Variable frequency drive application ... Variable frequency drive application guideVariable Frequency Drive (VFD) can be used in lots of fields. Variable frequency drives are widely used to control the speed of ...
Variable frequency drive in HVAC ... Variable frequency drive in HVAC systemsVariable frequency drives (VFD) have been used for HVAC systems in buildings for more than 40 years. But only in recent years, ...
Variable Frequency Drive Harmonics and ... A discussion of the benefits of variable frequency drives often leads to a question regarding electrical harmonic distortion ...
Three phase inverters Three phase invertersIn the variable frequency drive rectifier paper, it explains how to go from three phase alternating current voltage to a direct ...
Variable Frequency Drive Service
VFD manufacturers
Variable Frequency Drive Sales Email buy@vfds.org
Variable Frequency Drive Support Email tech@vfds.org