Yaskawa VS-616G5 Series Revision F Programming Manual - Manual (Page 36)

V/f V/f w/PG Open Loop
Vector
Flux
Vector
36 VS-616G5 Programming Manual
C4 Torque Compensation
Motor torque can be adjusted by changing the V/f pattern (E1-03) or by adjusting the torque compen-
sation gain. For details on setting the V/f pattern, see section E1, V/f Pattern Adjustment,.
Parameters C4-03, C4-04 and C4-05 are added for the OLV mode to help improve starting/breakaway
response. Individual torque compensation settings are possible for forward (C4-03) and reverse (C4-
04). The delay time (C4-05) is the time for which the internal torque reference will be increased. This
torque compensation is much like inputting an analog torque reference via an analog input.
The motor torque requirement changes according to load conditions. Full-range automatic torque boost
adjusts the voltage of the V/f pattern according to the required torque. The VS-616G5 automatically
adjusts the voltage during constant-speed operation as well as during acceleration.
The required torque is calculated by the inverter. This ensures tripless operation and power savings.
C3-06 Output Voltage Limit Operation Selection
<1110>
Output V Limit - - A A
Setting Description
0 Disabled (factory default)
When this parameter is “0” slip compensation will be disabled when the motor
is operating above its base speed. The motor voltage will not be reduced
above base speed.
1 Enabled
Open Loop Vector Mode: When this parameter is set to “1” the motor volt-
age will be reduced slightly when the motor is operating above 90% base
speed. Slip Compensation is enabled. Speed control accuracy is improved.
This may prevent speed instabilities due to motor voltage saturation. This set-
ting may improve speed regulation however motor torque/amp will be
reduced by up to 10% due to motor voltage reduction above base speed.
Flux Vector Mode: Torque linearity is improved.
C4-01 Torque Compensation Gain Torq Comp Gain B B B -
Section C: Tuning Parameters
C4 Torque Compensation