Manual Torque Boost; Automatic Torque Boost - Omron 3G3RX User Manual

Manual Torque Boost
•Outputs the voltage set in A042/A242/A342 or A043/A243/A343.
•In A042/A242/A342, set a ratio based on the voltage set in the motor voltage selection as 100%.
•If you raise the set value of the manual torque boost, be careful about motor overexcitation.
Otherwise, the motor may burn out.
•In manual torque boost frequency A043/A243/A343, set a ratio based on the base frequency as
100%.
Automatic Torque Boost
•If the automatic torque boost is selected in the torque boost selection (A041/A241: 01), it operates
to adjust the output frequency and voltage automatically, depending on the load level.
(In actual control, the automatic torque boost is used along with the manual torque boost.)
•To select the automatic torque boost, set motor capacity selection H003/H203 and motor pole
number selection H004/H204 correctly according to your motor.
•To avoid a possible overcurrent trip during deceleration, set the AVR selection to "Always ON"
(A081: 00).
•If the automatic torque boost cannot provide the desired characteristics, adjust each item, as
shown in the following table.
Phenomenon
Insufficient torque at low
speed
(Motor does not run at low
speed.)
Rotation speed lowers
when load is applied.
Rotation speed increases
when load is applied.
Overcurrent trip occurs
when load is applied.
Output
voltage (%)
100
A042/A242/A342
A043/A243/A343
Adjusting method
Gradually increase the voltage setting of the manual torque boost.
Gradually increase the slip compensation gain of the automatic
torque boost.
Gradually increase the voltage compensation gain of the automatic
torque boost.
Reduce the set value of the carrier frequency.
Gradually increase the slip compensation gain of the automatic
torque boost.
Gradually reduce the slip compensation gain of the automatic torque
boost.
Gradually reduce the voltage compensation gain of the automatic
torque boost.
Gradually reduce the slip compensation gain of the automatic torque
boost.
Gradually reduce the voltage setting of the manual torque boost.
Base frequency Output frequency
(100%)
4-2 Function Mode
Adjustment item
A042/A242
A047/A247
A046/A246
b083
A047/A247
A047/A247
A046/A246
A047/A247
A042/A242
4-20
4