Induction Motor Data; Auto-Tuning Induction Motors - KEB COMBIVERT F5 Instruction Manual

Initial Start Up
5.5.2 Induction Motor
Data
5.5.3 Auto-Tuning
Induction Motors
56
Enter the motor rated speed (rpm) in LF.11. For IM this value is not
the synchronous speed but the full load rpm which is always less than
synchronous speed. An example is a 6 pole motor; the synchronous speed
is 1200 rpm but the rated speed is lower, about 1165 rpm. If the rated speed
is not listed on the nameplate then the value can be approximated as the
synchronous speed less 2.%, so 1200 rpm - 35 rpm = 1165 rpm.
Enter the rated FLA of the motor in parameter LF.12.
Enter the rated nameplate frequency in parameter LF.13. In some cases
manufacturers of induction motors de-rate the motor by changing the
frequency to something less than 60hz, i.e. 40Hz. In this case enter
the nameplate value of 40Hz. Most gearless motors will have a very low
frequency in the range of 8 to 30 Hz. Enter the frequency as indicated on
the motor nameplate.
In LF.14 enter the rated motor voltage. For IM this is the AC voltage at the
rated frequency, i.e. 230V or 480V.
The IM power factor can be entered in LF.15. If this value is not known use the
default value of 0.0. This parameter sets the pre control for the magnetizing
current level. Higher values result in lower magnetizing current. For older
existing high slip or two speed motors use a value of 0.5.
The field weakening speed in LF.16 is calculated by the drive. It may be
necessary to adjust it later once the elevator is in operation and running at
high speed. For now leave it at the calculated value.
LF.17 is the motor rated torque. With IM this value is calculated and is only
for reference.
Entry of the IM motor data is now complete!
For best performance the motor model of the induction motor must be
measured by the drive. Use the following steps to complete the measurement
for induction motors.
Set up
1) Make sure the rated motor power (LF.10), rated motor speed (LF.11),
rated motor current (LF.12), rated motor frequency (LF.13), rated motor
voltage (LF.14) and rated power factor (LF.15) are entered into the drive
before you begin. If the power factor is not on the name plate use 0.0
as the value.
2) Remove one brake wire from the controller or reduce the brake pick voltage
level, preventing it from picking.