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Chapter 4 Parameter Settings|DD Series
4-35
Settings 0.0~6553.5mH
Torque Compensation Time Constant
Control mode
SVC
Factory setting: 0.020
Settings 0.001~10.000sec
Slip Compensation Time Constant
Control mode
SVC
Factory setting: 0.100
Settings 0.001~10.000sec
The slip compensation response time can be set by Pr.01-21 and Pr.01-22 and maximum up to 10 sec.
When Pr.01-21 and Pr.01-22 are set to 10 sec, it is the slowest response time the drive supports. If the
response time is set too quick, the system may be unstable.
Torque Compensation Gain
Control mode
VF
VFPG
Factory setting: 0
Settings
0～10
This parameter sets the amount of additional voltage output during operation to get greater torque.
Slip Compensation Gain
Control mode
VF
VFPG SVC
Factory setting: 0.00
Settings
0.00～10.00
When AC motor drive drives the induction motor, slips increase as load increase. This parameter can be
used to set compensation frequency and reduce the slip to close the synchronous speed when the motor
runs in the rated current to raise the drive accuracy. When drive’s output current is greater than the motor
current at no-load, the drive will compensate the frequency according to the setting in this parameter.
When actual speed is slower than expected, increase the value in Pr.01-24; if actual speed is faster than
expected, lower the value in Pr.01-24.
This parameter is valid for SVC mode only.
Slip Deviation Level
Control mode
VFPG SVC FOCPG
Factory setting: 0
Settings 00~1000% (0:Disable)
Detection Time of Slip Deviation
Control mode
VFPG SVC FOCPG
Factory setting: 1.0
Settings 0.0~10.0sec
Over Slip Treatment
Control mode
VFPG SVC FOCPG
Factory setting: 0
Settings
0: Warn and keep operation
1: Warn and ramp to stop
2: Warn and coast to stop
Pr.01-25 to Pr.01-27 is used to set the allowable slip level/time and over slip treatment when the drive is
running.
Hunting Gain
Control mode
VF
VFPG SVC
Factory setting: 2000