5.3 C: Tuning
186 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
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 circumstances:
• If the motor at constant speed is slower than the freque
ncy reference, increase C3-01.
• If the motor at constant speed is faster tha
n the frequency reference, decrease C3-01.
Note: Default setting is 0.0 in V/f Control (A1-02 = 0), and 1.0 in Open Loop Vector Control (A1-02 = 2). In Closed Loop Vector
Control, slip compensation is used correct inaccuracies that can result from temperature fluctuation in the rotor.
C3-02: Slip Compensation Primary Delay Time
Adjusts the filter on the output side of the slip compensation function. Although this parameter rarely needs to be
changed, adjustment may help in the following situations:
• Decrease the setting when the slip compensation response is too
slow.
• Increase this setting when speed is unstable.
Note: Default for V/f Control (A1-02 = 0) is 2000 ms. Default for Open Loop Vector Control (A1-02 = 2) is 200 ms.
C3-03: Slip Compensation Limit
Sets the upper limit for the slip compensation function as a percentage of the motor rated slip (E2-02).
The slip compensation limit is constant throughout the constant torque range (frequency reference E1-06). In the
constant power range (frequency reference E1-06), it is increased based on C3-03 and the output frequency as shown in
Figure 5.36.
Figure 5.36
Figure 5.36 Slip Compensation Limit
C3-04: Slip Compensation Selection during Regeneration
Enables or disables slip compensation during regenerative operation. When slip compensation during regeneration has
been activated and a regenerative load is applied, it might be necessary to use a dynamic 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.
Setting 0: Disabled
Slip compensation is not provided. Depending on the load and mode of operation, the actual motor speed will be lower or
higher than the frequency reference.
No. Parameter Name Setting Range Default
C3-01 Slip Compensation Gain 0.0 to 2.5 Determined by A1-02
No. Parameter Name Setting Range Default
C3-02 Slip Compensation Primary Delay Time 0 to 10000 ms Determined by A1-02
No. Parameter Name Setting Range Default
C3-03 Slip Compensation Limit 0 to 250% 200%
No. Parameter Name Setting Range Default
C3-04 Slip Compensation Selection during Regeneration 0 to 2 0
E1-04
E1-06
× C3-03
C3-03
E1-04
Maximum
Frequency
E1-06
Base
Frequency
Output Frequency
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