Yaskawa V7 Drives - Manual (Page 91)

5-39
n103 : Torque Compensation Gain (K
T ) Factory setting: 1.0
Range: 0.0 to 2.5
Torque Compensation Gain ( n103) adjusts how
much the output voltage is boosted when motor
load increases. It is used to compensate for
resistive losses in the motor and the wiring
between the drive and the motor.
n104 : Torque Compensation Time Constant Factory setting: See Table A3-2
Range: 0.0 to 2.5 (sec)
This parameter adjusts a time delay for the torque compensation gain. Increase to add torque
stability, decrease to improve torque response.
n105 : Torque Compensation Iron Loss Factory setting: See Table A3-1
Range: 0.0 to 6550 W
This parameter should be adjusted only when motor capacity and drive capacity are different.
n109 : Torque Compensation Limit Factory setting: 150%
Range: 0 - 250%
This parameter sets the upper voltage limit used by torque compensation.
Except for the most demanding of high starting torque applications, the factory settings of these
parameters will be adequate. The factory settings are set up to match the performance of typical
AC motors.
OUTPUT FREQUENCY
( HZ )
OUTPUT VOLTAGE
( VAC )
460
345
230
115
14 V
0
0
1.5 HZ
30 60
PROGRAMMED V/F PATTERN
(NO LOAD)
AUTO TORQUE BOOST
V/F PATTERN
Example of Torque Compensation
Operation
5.26 TORQUE COMPENSATION