2.3 C: Tuning
134
YASKAWA ELECTRIC
TOEP C710687 03B FSDrive-MV1000 Parameter Guide
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C3-24: Motor 2 Slip Compensation Selection during Regeneration
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.
Setting 0: Disabled
Setting 1: Enabled (6 Hz and above)
Setting 2: Enabled (compensation provided wherever possible)
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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.
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C4-01: Torque Compensation Gain
Sets the gain for the torque compensation function.
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.
No.
Name
Setting Range
Default
C3-24
Motor 2 Slip Compensation Selection During
Regeneration
0 to 2
0
No.
Refer to Control Mode Dependent Parameter Default Values on page 84
for details on default settings.
Name
Setting Range
Default
C4-01
Torque Compensation Gain
0.00 to 2.50
Determined by A1-02
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