5 Basic Settings
5 - 66
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
• In the 3G3RX-V1 Series Inverter, the automatic torque boost function is enabled by default
(A041/A241 = 01).
With this setting, the inverter adjusts the output voltage automatically, depending on the load
condition. However, the actual control must be provided in conjunction with the manual torque boost
function.
• To use the automatic torque boost function effectively, set the 1st/2nd Motor Capacity (H003/H203)
and the 1st/2nd Motor Pole Number (H004/H204) correctly according to your motor.
• To avoid possible overcurrent trip during deceleration, set the AVR Selection (A081) to 00 (Always
ON).
• To enable the slip compensation function in addition to the voltage compensation provided by the
automatic torque boost function, set the 1st/2nd Automatic Torque Boost Slip Compensation Gain
(A047/A247) to 100%.
• If the automatic torque boost does not provide the intended performance characteristics, adjust each
adjustment item shown in the following table.
Automatic Torque Boost
Phenomenon Adjustment method Adjustment item
Torque is insufficient at
low speeds. (Motor
does not rotating at
low speeds.)
(1) Gradually increase the Automatic Torque Boost Voltage
Compensation Gain.
A046/A246
(2) Set the Automatic Torque Boost Slip Compensation Gain to
100. Then, increase the set value gradually.
A047/A247
(3) Gradually increase the Manual Torque Boost Voltage. A042/A242
(4) Decrease the Carrier Frequency. b083
Overcurrent trip
occurs when load is
applied.
(1) Gradually decrease the Automatic Torque Boost Voltage
Compensation Gain.
A046/A246
(2) Set the Automatic Torque Boost Slip Compensation Gain to
100. Then, decrease the set value gradually.
A047/A247
(3) Gradually decrease the Manual Torque Boost Voltage. A042/A242
(4) Gradually decrease the Overload Limit Parameter. b023/b026
Phenomenon Adjustment method Adjustment item
Rotation speed
decreases when load
is applied.
Gradually increase the Automatic Torque Boost Slip Compensation
Gain.
A047/A247
Rotation speed
increases when load is
applied.
Gradually decrease the Automatic Torque Boost Slip
Compensation Gain.
A047/A247
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