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Using the Inverter for Special Motors
Observe the following precautions when using a special motor.
Pole-changing Motor
The rated input current of pole-changing motors differs from that of standard motors. Select an appropriate
Inverter according to the maximum current of the motor.
Gearmotor
The speed range for continuous operation differs according to the lubrication method and motor manufacturer.
In particular, continuous operation of an oil-lubricated motor in the low speed range may result in damaging.
If the motor is to be operated at a speed higher than 50 Hz, consult the manufacturer.
Synchronous Motor
A synchronous motor is not suitable for Inverter control.
Single-phase Motor
Do not use an Inverter for a single-phase capcitor motor. Any capacitors directly connected to the inverter out-
put may damage the Inverter.
Power Transmission Mechanism (Speed Reducers, Belts and Chains)
If an oil-lubricated gearbox or speed reducer is used in the power transmission mechanism, oil lubrication will
be affected when the motor operates only in the low speed range. The power transmission mechanism will
make noise and experience problems with service life and durability if the motor is operated at low speeds
continuously.
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