C4: Torque Compensation - YASKAWA AC Drive-A1000 Technical Manual

n C3-24: Motor 2 Slip Compensation Selection during Regeneration
Functions for motor 2 the same way that C3-04 functions for motor 1.
Refer to C3-04: Slip Compensation Selection during Regeneration on page 157
No.
Motor 2 Slip Compensation Selection during
C3-24
Setting 0: Disabled
Setting 1: Enabled (6 kHz and above)
Setting 2: Enabled (compensation provided wherever possible)
u

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.
n C4-01: Torque Compensation Gain
Sets the gain for the torque compensation function.
No.
C4-01
Torque Compensation in V/f, V/f w/PG, and OLV/PM:
Note: PM motor control modes are not available on 600 V class drives, CIMR-Ao5oooooooo.
The drive calculates the motor primary voltage loss using the output current and the termination resistor value (E2-05 for IM
motors, E5-05 for PM motors) and 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.
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 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.
C4-02
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.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Parameter Name
Regeneration
Parameter Name
Torque Compensation Gain
Parameter Name
Torque Compensation Primary Delay Time
for details on adjusting this parameter.
Setting Range
0 to 2
Setting Range
0.00 to 2.50
Setting Range
0 to 60000 ms
5.3 C: Tuning
Default
0
Default
Determined by
A1-02
5
Default
Determined by
A1-02
159