C4: Torque Compensation - YASKAWA L1000A Technical Manual

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C3-22: Motor 2 Slip Compensation Primary Delay Time
Functions for motor 2 in the same way that C3-02 functions for motor 1.
Refer to C3-02: Slip Compensation Primary Delay Time on page 157
No.
C3-22 Motor 2 Slip Compensation Primary Delay Time
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.
C3-23
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 shown in
the following diagram.
Figure 5.9

◆ C4: Torque Compensation

The torque compensation function compensates for insufficient torque production at start-up or when a load is applied.
Note: Set the motor parameters and V/f pattern properly before setting torque compensation parameters.
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C4-01: Torque Compensation Gain
Sets the gain for the torque compensation function.
No.
C4-01
Torque Compensation in V/f:
The drive calculates the motor primary voltage loss using the output current and the line to line resistance (E2-05) and
then adjusts the output voltage to compensate insufficient torque at start or when load is applied. The effects of this
voltage compensation can be increased or decreased using parameter C4-01.
Torque Compensation in OLV:
The drive controls the motor excitation current (d-Axis current) and torque producing current (q-Axis current) separately.
Torque compensation affects the torque producing current only. C4-01 works as a factor of the torque reference value that
builds the torque producing current reference.
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Parameter Name
Parameter Name
Motor 2 Slip Compensation Limit
E3-04
E3-06 × C3-23
C3-23
Frequency
Figure 5.9 Slip Compensation Limit
Parameter Name
Torque Compensation Gain
for instructions on how to adjust this parameter.
Setting Range
0 to 10000 ms
Setting Range
0 to 250%
Output Frequency
E3-06 E3-04
Base Maximum
Frequency
5.3 C: Tuning
Default
Determined by A1-02
Default
200%
common_TMonly
Setting Range Default
0.00 to 2.50
5
1.00
159