YASKAWA Varispeed V7 Instruction Manual page 132

Full-range Automatic Torque Boost (when V/f Mode Is
Selected: n002=0)
The motor torque requirement changes according to load conditions.
The full-range automatic torque boost adjusts the voltage of the V/f pat-
tern according to requirements. The Varispeed V7 automatically adjusts
the voltage during constant-speed operation, as well as during accelera-
tion.
The required torque is calculated by the Inverter.
This ensures tripless operation and energy-saving effects.
Output voltage
Operation
V
(Voltage)
Normally, no adjustment is necessary for the Torque Compensation
Gain (n103 factory setting: 1.0). When the wiring distance between the
Inverter and the motor is long, or when the motor generates vibration,
change the automatic torque boost gain. In these cases, set the V/f pat-
tern (n011 to n017).
Adjustment of the Torque Compensation Time Constant (n104) and the
Torque Compensation Iron Loss (n105) are normally not required.
Adjust the torque compensation time constant under the following con-
ditions:
• Increase the setting if the motor generates vibration.
• Reduce the setting if response is slow.
Torque compensation gain (n013)
Required torque
f (Frequency)
7. Programming Features
Required torque
Increase voltage
131