Torque Boost; Output Voltage Gain - Omron 3G3JX User Manual

Torque Boost

This function helps compensate for insufficient motor torque in a low speed range.
•Compensates for the voltage drop caused by the primary resistance of the motor or by wiring to
suppress torque reduction in a low speed range.
•To select the simple torque boost in the torque boost selection (A041/A241), set the motor capacity
selection (H003/H203) and motor pole number selection (H004/H204) according to your motor.
Manual Torque Boost [A042/A242, A043/A243]
•Adds the voltage set in A042/A242 and A043/A243 to the V/f characteristics, and outputs the
resulting voltage. The addition value is set in percentage terms based on the AVR voltage selection
(A082) as 100%.
•The manual torque boost frequency (A043/A243) is set in percentage terms based on the base
frequency as 100%.
Manual torque
boost voltage
•If you raise the set value of the manual torque boost, be careful about motor overexcitation.
Otherwise, the motor may burn out.
•Should such a situation occur, lower the set value of A042/A242.
Simple Torque Boost [A041/A241]
•If simple torque boost is selected in the torque boost selection (A041/A241: 01), it operates to
adjust the output voltage depending on the load level.
•To select simple torque boost in the torque boost selection (A041/A241), set the motor capacity
selection (H003/H203) and motor pole number selection (H004/H204) correctly according to your
motor.
•You may avoid a possible overcurrent trip during deceleration by always setting the AVR selection
to ON (A081: 00).
•Sufficient characteristics may not be obtained if you select two or more lower rank motor size than
specified.

Output Voltage Gain

•Changes the Inverter output voltage in percentage terms based on the AVR voltage selection
[A082] as 100%.
•The Inverter cannot output voltage beyond that of the incoming voltage.
Output
voltage (100%)
(A042/A242)
0
Manual torque boost
frequency (A043/A243)
Motor voltage
selection
(A082)
A045
Base frequency
(A003/A203)
V/f characteristics
(Example: VC)
Base frequency Max. frequency
(A003/A203) (A004/A204)
Output frequency (Hz)
When A045 = 100
Max. frequency
(A004/A204)
4-2 Function Mode
4-14
4