Mitsubishi Electric 800 Series Instruction Manual page 86

Checkpoint
Countermeasures are taken
against electrical corrosion on the
motor bearing.
*1 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.
Countermeasure
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). Contact your sales representative to
take appropriate countermeasures for the motor. The following shows examples
of countermeasures for the inverter.
• Decrease the carrier frequency.
• Provide a common mode choke
*1
on the output side of the inverter.
3. Precautions for Use of the Inverter
3.6 Checklist before starting operation
Refer to Check by
page user
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