Omron 3G3RX User Manual

4-20
4-2 Function Mode
4
Functions
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.
Output
voltage (%)
A042/A242/A342
Base frequency
(100%)
Output frequency
100
A043/A243/A343
Phenomenon Adjusting method Adjustment item
Insufficient torque at low
speed
(Motor does not run at low
speed.)
Gradually increase the voltage setting of the manual torque boost. A042/A242
Gradually increase the slip compensation gain of the automatic
torque boost.
A047/A247
Gradually increase the voltage compensation gain of the automatic
torque boost.
A046/A246
Reduce the set value of the carrier frequency. b083
Rotation speed lowers
when load is applied.
Gradually increase the slip compensation gain of the automatic
torque boost.
A047/A247
Rotation speed increases
when load is applied.
Gradually reduce the slip compensation gain of the automatic torque
boost.
A047/A247
Overcurrent trip occurs
when load is applied.
Gradually reduce the voltage compensation gain of the automatic
torque boost.
A046/A246
Gradually reduce the slip compensation gain of the automatic torque
boost.
A047/A247
Gradually reduce the voltage setting of the manual torque boost. A042/A242

Omron 3G3RX Specifications

General

Brand	Omron
Model	3G3RX
Category	DC Drives
Language	English