YASKAWA FSDrive-MV1000 Parameter Manual page 134

2.3 C: Tuning
C3-24: Motor 2 Slip Compensation Selection during Regeneration
n
Functions for motor 2 the same way that C3-04 functions for motor 1. Enables and disables slip compensation during
regeneration.
Even if enabled, this function does not operate when the output frequency is too low.
No.
Motor 2 Slip Compensation Selection During
C3-24
Setting 0: Disabled
Setting 1: Enabled (6 Hz 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.
C4-01: Torque Compensation Gain
n
Sets the gain for the torque compensation function.
No.
C4-01
<1> Refer to Control Mode Dependent Parameter Default Values on page 84
Torque Compensation in V/f:
The drive calculates the motor primary voltage loss using the output current and the termination resistor value (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.
Adjustment
Although this parameter rarely needs to be adjusted, 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.
134
Name
Regeneration
Name
Torque Compensation Gain
Setting Range
0 to 2
Setting Range
0.00 to 2.50
for details on default settings.
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
Default
0
Default
Determined by A1-02
<1>