Instruction manual

7. Programming Features
171
 Decreasing Motor Speed Fluctuation
 Slip Compensation (n002 = 0)
As the load becomes larger, the motor speed is reduced and the motor
slip value is increased. The slip compensating function controls the
motor speed at a constant value even if the load varies.
When the Inverter output current is equal to the Motor Rated Current
(n036), the compensation frequency is added to the output frequency.
Related Constants
* Depends on Inverter capacity.
Note: 1. Slip compensation is not performed under the following condition:
Output frequency < Minimum Output Frequency (n016)
2. Slip compensation is not performed during regeneration.
3. Slip compensation is not performed when the Motor Rated Current
(n036) is set to 0.0 A.
Constant
No.
Name Unit Setting Range Factory
Setting
n036 Motor Rated Current 0.1 A 0% to 150% of Inverter
rated current
*
n111 Slip Compensation
Gain
0.1 0.0 to 2.5 0.0
n110 Motor No-load Current 1% 0% to 99% (100%=Mo-
tor Rated Current n036)
*
n112 Slip Compensation
Time Constant
0.1 s 0.0 to 25.5 s
When 0.0 s is set, delay
time is 2.0 s
2.0 s
n106 Motor Rated Slip 0.1 Hz 0.0 to 20 Hz *
Output current − Motor no-load current (n110)
Motor rated current
(n036)
Motor no-load current (n110)
Slip compensation gain (n111)
Compensation frequency = Motor rated slip (n106)