
4-157
Load Torque
Speed
Larger Load
Smaller Load
f2
f1
18-01: Slip compensation gain at high speed
(1) It is not required to adjust the Slip compensation gain at high speed for a loaded motor.
(2) After adjusting parameter 18-00 it is recommended to increase the reference frequency and check the motor
speed. Increase the value of 18-01 to adjust the slip compensation in case the motor speed does not match.
(3) To reduce speed errors Increase the motor rated frequency (01-12 base frequency) and increase the value of
18-01.
(3) Compared to 18-00, 18-01 serves as a variable gain for the full speed range.
(4) If the speed accuracy becomes worse due to an increase in motor temperature, it is recommended to use a
combination of 18-00 and 18-01 to adjust motor slip.
Parameter 18-01 determines the slip compensation at the motor rated speed and is calculated as follows:
Reference Frequency
Slip Compensation Gain (Slip Compensation Gain at low speed Slip Compensation Gain at high speed)
Motor rated frequency (01-12)
Slip compensation
Frequency
Reference
18-01
18-00
Torque
Speed
Decrease
18-01
Decrease
18-01
Increase
18-01
Increase
18-01
Slip Compensation Gain Versus Frequency Reference
Parameter 18-01 effect on speed/torque curve
Note:
Default depends on value of parameter 13-00.