YASKAWA AC Drive-A1000 Technical Manual page 157

No.
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 corrects inaccuracies that can result from temperature fluctuation in the rotor.
n 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,
adjustments may be necessary in the following situations:
• Decrease the setting when the slip compensation response is too slow.
• Increase this setting when speed is unstable.
No.
C3-02
Note: Default for V/f Control (A1-02 = 0) is 2000 ms. Default for Open Loop Vector Control (A1-02 = 2) is 200 ms.
n 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.
C3-03
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 the following
diagram.
n 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).
This function does not operate when the output frequency is too low, regardless of whether it has been enabled.
No.
C3-04 Slip Compensation Selection during Regeneration
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.
Setting 1: Enabled (6 kHz and above)
Slip compensation is enabled during regenerative operation. It will not be active at output frequencies below 6 Hz.
Setting 2: Enabled (compensation provided wherever possible)
Slip compensation is enabled during regenerative operation and at frequencies as low as 2 Hz. The drive uses the motor rated
slip set to E2-02 to automatically calculate the frequency range where compensation will be disabled.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Parameter Name
Slip Compensation Gain
Parameter Name
Slip Compensation Primary Delay Time
Parameter Name
Slip Compensation Limit
E1-04
E1-06 × C3-03
C3-03
Figure 5.32 Slip Compensation Limit
Parameter Name
Output Frequency
E1-06 E1-04
Base Maximum
Frequency Frequency
5.3 C: Tuning
Setting Range
Determined by
0.0 to 2.5
Setting Range
Determined by
0 to 10000 ms
Setting Range
0 to 250%
Setting Range
0 to 2
Default
A1-02
Default
A1-02
Default
200%
5
Default
0
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