Yaskawa J1000 Compact V/f Control Drive - Manual (Page 28)

NOTICE
When the wiring distance is greater than 100 meters, pay special attention to the motor
insulation voltage or use a drive-rated motor.
Failure to comply could lead to motor winding failure.
Motor vibration may increase when operating a machine in variable-speed mode, if
that machine previously operated at a constant speed.
Install vibration-proof rubber on the motor base or use the frequency jump function to skip
a frequency resonating the machine.
The motor may require more acceleration torque with drive operation than with a
commercial power supply.
Set a proper V/f pattern by checking the load torque characteristics of the machine to be
used with the motor.
The rated input current of submersible motors is higher than the rated input current
of standard motors.
Select an appropriate drive according to its rated output current. When the distance between
the motor and drive is long, use a cable thick enough to connect the motor to the drive to
prevent motor torque reduction.
When using an explosion-proof motor, it must be subject to an explosion-proof test in
conjunction with the drive.
This is also applicable when an existing explosion-proof motor is to be operated with the
drive. Since the drive itself is not explosion-proof, always install it in a safe place.
Do not use a drive for a single-phase motor.
Replace the motor with a three-phase motor.
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 a speed higher than the rated speed.
2.1 Section Safety
28 YASKAWA ELECTRIC TOEP C710606 26D YASKAWA AC Drive – J1000 Quick Start Guide