4-2 Function Mode „ 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%. 4 Output voltage (100%) Functions Manual torque boost voltage (A042/A242) Manual torque boost frequency (A043/A243) 0 Base frequency (A003/A203) Max. frequency (A004/A204) Output frequency (Hz) •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. Motor voltage selection (A082) When A045 = 100 A045 Base frequency (A003/A203) Max. frequency (A004/A204) 4-14 V/f characte (Example: V