• Decrease this setting when motor oscillation occurs.
Adjust C4-01 so the output current does not exceed the drive rated current.
Note:
1.
Refrain from adjusting torque compensation in Open Loop Vector Control, as it can have a negative effect on torque accuracy.
2.
Refrain from adjusting this parameter in OLV/PM. Setting this value too high can cause overcompensation and motor oscillation.
n
C4-02: Torque Compensation Primary Delay Time
Sets the delay time used for applying torque compensation.
No.
Parameter Name
Setting Range
Default
C4-02
Torque Compensation Primary Delay Time
0 to 60000 ms
Determined by
A1-02
Adjustment
Although C4-02 rarely needs to be changed, adjustments may be necessary in the following situations:
• Increase this setting if the motor vibrates.
• Decrease this setting if the motor responds too slowly to changes in the load.
n
C4-03: Torque Compensation at Forward Start (OLV)
Sets the amount of torque at start in the forward direction to improve motor performance during start with a heavy load.
Compensation is applied using the time constant set in parameter C4-05. Enable this function when the load pulls the motor
in reverse when starting with a Forward run command. Setting 0.0% disables this feature.
No.
Parameter Name
Setting Range
Default
C4-03
Torque Compensation at Forward Start
0.0 to 200.0%
0.0%
n
C4-04: Torque Compensation at Reverse Start (OLV)
Sets the amount of torque reference at start in the reverse direction to improve motor performance during start with heavy
load. Compensation is applied using the Torque Compensation Time set in parameter C4-05. Enable this function if the load
pulls the motor in the forward direction when starting with a Reverse run command. Setting 0.0% disables this feature.
No.
Parameter Name
Setting Range
Default
C4-04
Torque Compensation at Reverse Start
-200.0 to 0.0%
0.0%
n
C4-05: Torque Compensation Time Constant (OLV)
Sets the time constant for applying the torque compensation at start that is set to C4-03 and C4-04.
No.
Parameter Name
Setting Range
Default
C4-05
Torque Compensation Time Constant
0 to 200 ms
10 ms
n
C4-06: Torque Compensation Primary Delay Time 2 (OLV)
Sets the time constant used during Speed Search or during regenerative operation. Adjust the value if an overvoltage fault
occurs with sudden changes in the load or at the end of acceleration with high inertia load.
No.
Parameter Name
Setting Range
Default
C4-06
Torque Compensation Primary Delay Time 2
0 to 10000 ms
150 ms
Note:
If C4-06 is set to a relatively large value, increase the setting in n2-03 (AFR Time Constant 2) proportionally.
n
C4-07: Motor 2 Torque Compensation Gain
Functions for motor 2 the same way that C4-01 functions for motor 1.
Refer to C3-01: Slip Compensation Gain on page 48
for details on adjusting this parameter.
No.
Parameter Name
Setting Range
Default
C4-07
Motor 2 Torque Compensation Gain
0.00 to 2.50
1.00
1.3 C: Tuning
52
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Summary of Contents for A1000 HHP
Page 359: ......
