When driving a 400V class motor with an inverter, a surge voltage may come out between the motor terminals, and it may cause deterioration of the motor insulation.
There are generally two means of suppressing this surge voltage: suppression when the voltage rises (output reactor) and suppression of the crest value (output filter).

(1) Output reactor

If the length of the wiring is relatively short, the surge voltage can be reduced by installing an AC reactor on the inverter's output side to suppress the increase in voltage.
However, it may be difficult to suppress the surge voltage crest value with longer wiring.

(2) Output filter

Install a filter on the inverter's output side to suppress the crest value of the motor terminal voltage.

When driving a brake-equipped gearmotor with an inverter, the brake wiring (power supply wiring leading to the brake rectifier) must bypass the inverter (be supplied from the inverter's primary side).

Although for 3-phase high voltage (400V class) gearmotors with brakes the motor itself provides two 200V terminals for use in supplying power to the brake, these 200V terminals cannot be used when driving the motor with an inverter. Provide a separate 200V power supply.
If there is a separate 100V power supply, a rectifier for 100V input can be used.

*If you want the brake to operate with a 100V power supply, please specify the A100-D90 rectifier when placing your order.

To ensure safe operation, always insulate the 200V terminals.