YASKAWA FSDrive-MV1000 - C3: Slip Compensation

2.3 C: Tuning
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide 131
Figure 2.24 explains how S-curves are applied.
Figure 2.24
Figure 2.24 S-Curve Timing Diagram - FWD/REV Operation
Setting the S-curve will increase the acceleration and deceleration times.
Actual accel time = accel time setting + (C2-01 + C2-02) / 2
Actual decel time = decel time setting + (C2-03 + C2-04) / 2
u C3: Slip Compensation
The Slip Compensation function improves the speed accuracy of an induction motor. By adjusting the output frequency
in accordance with the motor load, it compensates for the slip and makes the motor speed equal to the frequency
reference.
Note: In Closed Loop Vector control, perform Auto-Tuning and make sure that the motor rated current (E2-01), the motor rated slip
(E2-02), and the no-load current (E2-03) have all been set properly before making any adjustments to slip compensation
parameters.
n C3-01: Slip Compensation Gain
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:
• Increase the setting if the motor at constant speed is slower than the frequency reference.
• Decrease the setting if the motor at constant speed is faster than the frequency reference.
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, adjustment may help in the following situations:
• Decrease the setting when the slip compensation response is too slow.
• Increase this setting when the speed is unstable.
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.
<1> Refer to Control Mode Dependent Parameter Default Values on page 84 for details on default settings.
Name Setting Range Default
C3-01 Slip Compensation Gain 0.0 to 2.5 Determined by A1-02 <1>
No. Name Setting Range Default
C3-02
<1> Refer to Control Mode Dependent Parameter Default Values on page 84 for details on default settings.
Slip Compensation Primary Delay Time 0 to 10000 ms Determined by A1-02 <1>
No. Name Setting Range Default
C3-03 Slip Compensation Limit 0 to 250% 200%
C2-02
C2-01
C2-03
C2-04
C2-02
C2-01
C2-03
C2-04
Forward run
Reverse run
Output frequency
ON
OFF
ON
OFF
common_TMonly
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