Programming 30
C3 Motor-Slip Compensation
As the load becomes larger, the motor speed is reduced and motor slip increases. The slip compensation function keeps the
motor speed constant even under varying load conditions.
C3-01 Slip Compensation Gain
Setting Range: 0.0 to 2.5
Factory Default: 1.0
This function controls the output frequency in response to the load’s torque demand. Increase the set value in one tenth (0.1)
increments when operating at low speeds; decrease the set value as the motor speed increases.
During flux vector control, this gain compensates for motor slip causes by changes in temperature. Normally, this setting does
not have to be modified.
Note: Default factory setting will be 0.0 when parameter A1-02=0 (V/f control without PG). When parameter A1-02=2 (Open
Loop Vector) or 3 (Flux Vector) the default factory setting will be 1.0.
C3-02 Slip Compensation Primary Delay Time
Setting Range: 0 to 10000 ms
Factory Default: 200 ms
Adjust the slip compensation delay time when motor speed is unstable or speed response is slow. Increase the set value in 10ms
increments when operating at low speeds; decrease the set value as the motor speed increases.
Note: Default factory setting will be 2000 ms when parameter A1-02=0 (V/f control without PG). When parameter A1-02=2
(Open Loop Vector) the default factory setting will be 200 ms.
C3-03 Slip Compensation Limit
Setting Range: 0 to 250%
Factory Default: 200%
Sets the slip compensation limit as a percentage of motor rated slip (E2-02).
Fig. 24 Slip Compensation Limit Adjustment
E1-04
E1-06
× C3-03
C3-03
E1-04E1-06
Output Frequency
Maximum
Base
Frequency
Frequency
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