Instruction Manual

89
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Decreasing Motor Speed Fluctuation
As the load becomes larger, motor speed is reduced and motor slip value is increased.
The slip compensating function controls the motor speed at a parameter value even if
the load varies.
When inverter output current is equal to the motor rated current (n036), the
compensation frequency is added to the output frequency.
Related Parameters
* Differs depending on inverter capacity.
Notes: 1. Slip compensation is not performed in the following condition:
Output frequency < minimum output frequency (n016).
2. Slip compensation is not performed during regeneration.
3. Slip compensation is not performed when motor rated current (n036) is
set to 0.0A.
Slip compensation (When V/f control mode n002=0)
Parameters
No.
Name Unit Setting Range
Initial
Setting
n036 Motor rated current 0.1A 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% = Motor rated current n036) *
n112
Slip compensation primary
delay time
0.1s
0.0 to 25.5s
When 0.0s is set, delay time becomes 2.0s.
2.0s
n106 Motor rated slip 0.1Hz 0.0 to 20Hz *
Compensation frequency Motor rated slip (n106)
=
Output current Motor no-load current (n110)
–
Electronic thermal
reference current (n036)
Motor no-load current (n110)
–
--------- --------- ------------- ------------ ------------- ------------ ------------- ------------ --------- ------------- ------------ ------------- -------
×
Slip compensation gain (n111)
×