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6 .6 ADJUST NG MOTOR TORQUE
(1) Torque Compensation Gain (H067)
Motor torque requirement changes according to load conditions. Full-range automatic torque boost
adjusts voltage of V/f pattern according to the requirement. The TG-300 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 energy saving effects.
Output voltage
∝ Torque compensation gain (H067) ¯ Required torque
●Operation
V
(Voltage)
Required torque
→Increase voltage
f (Frequency)
Normally, no adjustment is necessary for torque compensation gain (H067 factory setting: 1.O).
When the wiring distance between the inverter and the motor is long, or when the motor generates
vibration, change the torque compensation gain.
Increasing torque compensation gain increases motor torque, but an excessive increase may cause
the followings:
●Inverter malfunctions because of motor overexcitation
●Motor overheat or excessive vibration
Increase torque compensation gain gradually while verifying the motor current.
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