u
C3: Slip Compensation
The Slip Compensation function prevents motor speed loss due to an increase in load.
Note: Before making changes to the Slip Compensation parameters, make sure the motor parameters and V/f pattern are set properly or
perform Auto-Tuning.
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C3-01: Slip Compensation Gain
This
parameter sets the gain for the motor
slip compensation function. Although this parameter rarely needs to be changed,
adjustments might be needed under the following situations:
• If the speed at constant frequency reference is lower than the frequency reference, increase C3-01.
• If the speed at constant frequency reference is higher than the frequency reference, decrease C3-01.
No. Parameter Name Setting Range Default
C3-01 Slip Compensation Gain 0.0 to 2.5
Determined by
A1-02
Note: Default setting is 0.0 in V/f Control (A1-02 = 0). Default setting is 1.0 in Open Loop Vector Control (A1-02 = 2). This parameter is
disabled when using V/f Control with Simple PG Feedback (H6-01 = 3).
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C3-02: Slip Compensation Primary Delay Time
Adjusts the filter on the output of the slip compensation function. Although this parameter rarely needs to be changed,
adjustments might be needed under the following situations:
•
Decrease the setting when the slip compensation response is too slow.
• Increase this setting when the speed is not stable.
No. Parameter Name Setting Range Default
C3-02 Slip Compensation Primary Delay Time 0 to 10000 ms
Determined by
A1-02
Note: When using V/f Control (A1-02 = 0), the default setting becomes 2000 ms. When using Open Loop Vector Control (A1-02 = 2), the
default setting becomes 200 ms. This function is not available when using V/f Control with Simple PG Feedback.
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C3-03: Slip Compensation Limit
Sets the upper limit for the slip compensation function as a percentage of the motor rated slip (E2-02).
No. Parameter Name Setting Range Default
C3-03 Slip Compensation Limit 0 to 250% 200%
The slip compensation limit is constant throughout the constant torque range. In the constant power range it is increased
based on C3-03 and the output frequency as shown in the following diagram.
Note: This parameter is disabled when using V/f Control with Simple PG Feedback Control (H6-01 = 3).
E1-04
E1-06
× C3-03
C3-03
E1-04
Maximum
Frequency
E1-06
Base
Frequency
output frequency
Figure 5.28 Slip Compensation Limit
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C3-04: Slip Compensation Selection during Regeneration
When
the slip compensation during regeneration function has been activated and regenerative load is applied, it might be
necessary to use a braking option (braking resistor, braking resistor unit, or braking unit).
Even if enabled, this function does not operate when the output frequency is too low.
No. Parameter Name Setting Range Default
C3-04 Slip Compensation Selection during Regeneration 0 or 1 0
Setting 0: Disabled
Slip compensation is not provided. Depending on the
load and operation mode (motoring or regenerative) the actual motor
speed will be lower or higher than the frequency reference.
5.3 C: Tuning
146
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
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