Countermeasures are taken
against electrical corrosion on the
When a motor is driven by the inverter, axial voltage is generated on the motor
shaft, which may cause electrical corrosion of the bearing in rare cases
depending on the wiring, load, operating conditions of the motor or specific
inverter settings (high carrier frequency and EMC filter ON). Contact your sales
representative to take appropriate countermeasures for the motor. The following
shows examples of countermeasures for the inverter.
• Decrease the carrier frequency.
• Turn OFF the EMC filter.
• Provide a common mode choke
effective regardless of the EMC filter ON/OFF connector setting.)
Recommended common mode choke: FT-3KM F series FINEMET®
common mode choke cores manufactured by Hitachi Metals, Ltd.
FINEMET is a registered trademark of Hitachi Metals, Ltd.
on the output side of the inverter. (This is
3. PRECAUTIONS FOR USE OF THE INVERTER
3.6 Checklist before starting operation