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Inverter-driven 400v Class Motor - Mitsubishi Electric FR-A500 Instruction Manual

Transistorized inverter.
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Inverter-driven 400V class motor

In the PWM type inverter, a surge voltage attributable to wiring constants is generated at the motor terminals.
Especially for a 400V class motor, the surge voltage may deteriorate the insulation. When the 400V class
motor is driven by the inverter, consider the following measures.
It is recommended to take either of the following measures:
(1) Rectifying the motor insulation
For the 400V class motor, use an insulation-rectified motor. Specifically,
1) Specify the "400V class inverter-driven, insulation-rectified motor".
2) For the dedicated motor such as the constant-torque motor and low-vibration motor, use the "inverter-
driven, dedicated motor".
(2) Suppressing the surge voltage on the inverter side
On the secondary side of the inverter, connect the optional surge voltage suppression filter (FR-ASF-H).


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