YASKAWA L1000A - Page 176

5.3 C: Tuning
176 YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Figure 5. 8
Figure 5.8 Slip Compensation Limit
■ C3-04: Slip Compensation Selection during Regeneration
Enables or disables slip compensation during regenerative operation.
This function does not operate when the output frequency is too low, regardless of whether it has been enabled.
Setting 0: Disabled
Slip compensation is not provided. The actual motor speed might be higher than the speed reference.
Setting 1: Enabled (6 Hz 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.
■
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.
Note: Available control modes for parameter C3-05 vary by drive model: Models CIMR-LU20008 to 20415, 40005 to 40605,
and 50003 to 50200: Available when A1-02 = 2, 3
Setting 0: Disabled
Setting 1: Enabled
■ C3-21: Motor 2 Slip Compensation Gain
Used to improve speed accuracy for motor 2. Functions in the same way that C3-01 functions for motor 1.
Adjust this parameter only after the motor rated current (E4-01), motor rated slip (E4-02), and the motor no-load current
(E4-03) have all been set.
Refer to C3-01: Slip Compensation Gain on page 175 for details on adjusting this parameter.
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.
No. Parameter Name Setting Range Default
C3-04 Slip Compensation Selection during Regeneration 0 to 2 0
No. Parameter Name Setting Range Default
C3-05 Output Voltage Limit Operation Selection 0 or 1 Determined by A1-02
No. Parameter Name Setting Range Default
C3-21 Motor 2 Slip Compensation Gain 0.0 to 2.5 Determined by E3-01
E1-04
E1-06
× C3-03
C3-03
E1-04
Maximum
Frequency
E1-06
Base
Frequency
Output speed
common_TMonly
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