What can be done when variable speed drives or VFDs are causing motor bearing failures?
Issue:
What can be done when VFDs are causing bearing failures?
Product line:
Altivar All
Environment:
All models, all serial numbers
What can be done when VFDs are causing bearing failures?
Product line:
Altivar All
Environment:
All models, all serial numbers
Cause:
Shaft currents causing the motor bearings to weld.
Resolution:
This phenomena is inherent to VFD use. On the VFD, try lowering the switching frequency to reduce effects but not resolve it.
Other suggestions include:
installing shaft grounding systems
installing insulated bearings
adding a dv/dt filter to couple less voltage to the rotor
adding a common mode filter
verify good grounding from the motor directly back to the VFD
Shaft currents causing the motor bearings to weld.
Resolution:
This phenomena is inherent to VFD use. On the VFD, try lowering the switching frequency to reduce effects but not resolve it.
Other suggestions include:
installing shaft grounding systems
installing insulated bearings
adding a dv/dt filter to couple less voltage to the rotor
adding a common mode filter
verify good grounding from the motor directly back to the VFD
Udgivet til: Schneider Electric Danmark
Brug for hjælp?
Produktvælger
Find hurtigt og nemt de rette produkter og det rette tilbehør til dine anvendelser.
Få et tilbud
Start din salgsforespørgsel online, så vil du blive kontaktet af en ekspert.
Find forhandler
Find den nærmeste Schneider Electric-distributør.
Hjælpecenter
Find supportressourcer til alle dine behov på ét sted.