Yaskawa L1000E AC Drive Technical Manual for CIMR-LE Models for Elevator Applications - Manual (Page 168)

5.3 C: Tuning
168 YASKAWA ELECTRIC SIEP YAIL1E 01A YASKAWA AC Drive L1000E Technical Manual
Adjustment
Although this parameter rarely needs to be changed, it may be necessary to adjust the torque compensation gain in small
steps of 0.05 in the following situations:
• Increase this setting when using a long motor cable.
• Decrease this setting when motor oscillation occurs.
Adjust C4-01 so that the output current does not exceed the drive rated current.
Note: Refrain from adjusting torque compensation in Open Loop Vector Control, as it can have a negative effect on torque accuracy.
■ C4-02: Torque Compensation Primary Delay Time
Sets the delay time used for applying torque compensation.
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.
■ C4-03: Torque Compensation at Forward Start
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 Up/Down command. Setting of 0.0% disables this feature.
■ C4-04: Torque Compensation at Reverse Start
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 time constant set in parameter C4-05. Enable this function if the load pulls the
motor in the forward direction when starting with a Reverse Up/Down command. Setting 0.0% disables this feature.
■ C4-05: Torque Compensation Time Constant
Sets the time constant for applying the torque compensation at start that is set to C4-03 and C4-04.
■ C4-07: Motor 2 Torque Compensation Gain
Functions for motor 2 in the same way that C4-01 functions for motor 1.
Refer to C3-01: Slip Compensation Gain on page 165 for details on adjusting this parameter.
No. Parameter Name Setting Range Default
C4-02 Torque Compensation Primary Delay Time 0 to 60000 ms Determined by A1-02
No. Parameter Name Setting Range Default
C4-03 Torque Compensation at Forward Start 0.0 to 200.0% 0.0%
No. Parameter Name Setting Range Default
C4-04 Torque Compensation at Reverse Start -200.0 to 0.0% 0.0%
No. Parameter Name Setting Range Default
C4-05 Torque Compensation Time Constant 0 to 200 ms 10 ms
No. Parameter Name Setting Range Default
C4-07 Motor 2 Torque Compensation Gain 0.00 to 2.50 1.00