C4: Torque Compensation - YASKAWA FSDrive-MV1000 Parameter Manual

C3-24: Motor 2 Slip Compensation Selection during Regeneration
■
Functions for motor 2 in the same way that C3-04 functions for motor 1.
Parameter C3-24 enables/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)

◆ C4: Torque Compensation

The torque compensation function compensates for insufficient torque production at start-up or when a load is applied.
Note: Make sure the motor parameters and V/f pattern are set properly before setting torque compensation parameters.
■ C4-01: Torque Compensation Gain
Sets the gain for the torque compensation function.
No.
C4-01
<1> For details on the default settings, refer to
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, changing the torque compensation gain in small steps of 0.05 may
help 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.
YASKAWA ELECTRIC EZZ010930 FSDrive-MV1000 Parameter Guide
Name
Regeneration
Name
Torque Compensation Gain
Control Mode Dependent Parameter Default Values on page
Setting Range
0 to 2
Setting Range
0.00 to 2.50
2.3 C: Tuning
Default
0
Default
Determined by A1-02
<1>
79.
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