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C3-05: Output Voltage Limit Operation Selection
Determines if the motor flux reference is automatically reduced when output voltage reaches the saturation range.
If the input power supply voltage is low or the motor has a high voltage rating, this function improves the speed precision
when moving heavy loads at high speeds. When selecting the drive, remember that the reduction in flux causes a slightly
higher current at high speed when this function is enabled.
No. Parameter Name Setting Range Default
C3-05 Output Voltage Limit Operation Selection 0, 1 0
Setting 0: Disabled
Setting 1: Enabled
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C3-21: Motor 2 Slip Compensation Gain
Improves the speed accuracy for motor 2 and functions in the same way that C3-01 functions for motor 1. Adjust this parameter
only after setting the motor rated current (E4-01), motor rated slip (E4-02), and the motor no-load current (E4-03).
Refer to C3-01: Slip Compensation Gain on page 156 for details on adjusting this parameter.
No. Parameter Name Setting Range Default
C3-21 Motor 2 Slip Compensation Gain 0.0 to 2.5 Determined by E3-01
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) and Closed Loop Vector
Control (A1-02 = 3). In Closed Loop Vector Control, slip compensation gain acts as an adaptable gain.
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C3-22: Motor 2 Slip Compensation Primary Delay Time
Functions for motor 2 the same way that C3-02 functions for motor 1.
Refer to C3-02: Slip Compensation Primary Delay Time on page 157 for details on adjusting this parameter.
No. Parameter Name Setting Range Default
C3-22 Motor 2 Slip Compensation Primary Delay Time 0 to 10000 ms Determined by A1-02
Note: The default for V/f Control (A1-02 = 0) is 2000 ms. The default for Open Loop Vector Control (A1-02 = 2) is 200 ms.
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C3-23: Motor 2 Slip Compensation Limit
Sets the upper limit for the slip compensation function as a percentage of the motor rated slip (E4-02).
No. Parameter Name Setting Range Default
C3-23 Motor 2 Slip Compensation Limit 0 to 250% 200%
The slip compensation limit is constant throughout the constant torque range (frequency reference ≤ E3-06). In the constant
power range (frequency reference ≥ E3-06), it is increased based on C3-23 and the output frequency as illustrated in the
following diagram.
E3-04
E3-06
× C3-23
C3-23
E3-04
Maximum
Frequency
E3-06
Base
Frequency
Output Frequency
Figure 5.33 Slip Compensation Limit
5.3 C: Tuning
158
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
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