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7 Advanced Settings
High-function General-purpose Inverter RX2 Series User’s Manual
7-2 Selection of Motor Control Methods
7
7-2-6 Automatic Torque Boost
Parameter
Item Parameter Data Description
Default
data
Control mode [AA121] 03 To use the automatic torque boost (IM). 00
Stability constant [HA110] 0 to 1000(%)
To adjust the control for reducing the hunting of
motors.
100
Async.Motor Base
frequency setting,
1st-motor
[Hb104]
10.00 to the
maximum fre-
quency (Hz)
To set the base frequency of motors.
50
*1
*1. Default data when default data selection (UB-02) is set to 01.
Async.Motor Maxi-
mum frequency
setting, 1st-motor
[Hb105]
Base fre-
quency to
590.00 (Hz)
To set the maximum frequency of motors.
50
*1
Async.Motor rated
voltage, 1st-motor
[Hb106] 1 to 1000 (V) Set the rated voltage of motors.
200V:
230
*1
400V:
400
*1
Automatic torque
boost voltage com-
pensation gain,
1st-motor
[HC101] 0 to 255
To adjust the amount of the voltage added by
the automatic torque boost.
100
Automatic torque
boost slip compen-
sation gain,
1st-motor
[HC102] 0 to 255
To adjust the amount of the frequency added by
the automatic torque boost.
100
Phenomenon Estimated cause(s) Exemplar measures to be taken
Slower motor revolu-
tion at low speeds than
what is expected
Insufficient output volt-
age, which in turn ren-
ders the torque
insufficient
Make an adjustment by incrementing the automatic torque
boost voltage compensation gain [HC101] by approximately
5% each time.
Insufficient frequency
correction, which in
turn renders the torque
insufficient.
Make an adjustment by incrementing the automatic torque
boost slip compensation gain [HC102] by approximately 5%
each time
A heavy load lowers
the revolution fre-
quency of the motor.
Insufficient frequency
correction, which in
turn renders the torque
insufficient.
Make an adjustment by incrementing the automatic torque
boost slip compensation gain [HC102] by approximately 5%
each time
A heavy load raises
the revolution fre-
quency of the motor.
An excessive fre-
quency correction
raises the frequency.
Make an adjustment by decrementing the automatic torque
boost slip compensation gain [HC102] by approximately 5%
each time
With a heavy load, an
acceleration causes
an over current.
An excessive voltage
correction increases
the current.
Make an adjustment by decrementing the automatic torque
boost voltage compensation gain [HC101] by approximately
5% each time.
An excessive fre-
quency correction
raises the frequency.
Make an adjustment by decrementing the automatic torque
boost slip compensation gain [HC102] by approximately 5%
each time
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