8-3
8.3 Volts/Hz Curve Modification (Torque Boost) (01-10)
This parameter sets the relationship between output frequency and output voltage. Constant torque applications
have the same torque requirements at low speed as well as at high speed.
Initial Setup
For Variable Torque / Normal Duty applications set parameter 01-10 to an initial value of 0.5.
For Constant Torque / Heavy Duty applications set parameter 01-10 to an initial value of 1.0.
01-10 Torque compensation gain
This parameter sets the torque boost for motor 1.
Setting range: 0.0 to 10.0
To set parameter 01-10:
- After power-up press the MODE key
- Select 01-10 using the arrow keys and up/down keys
- Press </ENTER key
- Set parameter 01-10 using the arrow keys and </ENTER key to save setting.
Increase value when:
The wiring between the inverter and the motor very too long
The motor size is smaller than the inverter size
Note: Gradually increase the torque compensation value and make sure the output current does not exceed
inverter rated current.
Reduce value when:
Experiencing motor vibration
Over Current Fault
Overload Fault
Important: Confirm that the output current at low speed does not exceed the rated output current of the inverter.
Warning: A larger than required torque boost value creates over-excitation at low speeds,
continued operation may cause the motor to overheat. Check the characteristics of the motor for
additional information.
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