Chapter 4 Parameter SettingsDD Series

 

 

 

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 VFPGFactory setting: 0 Settings 010

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 0.0010.00

 

 

 

 

 

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

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3Com VFD-D D Torque Compensation Time Constant, Slip Compensation Time Constant, Torque Compensation Gain, Hunting Gain

VFD-D D specifications

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