Explanation of Function
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AVR setting voltage.
Torque boost
A correctly installed motor and careful attention to voltage
drop in the wiring will improve the motor torque at low speed.
Setting of A041/A241 will select between manual torque
boost and automatic torque boost, the level of torque boost
corresponds to the set motor capacity selection (H003/H203)
and the motor pole selection (H004/H204).
Set item
Function
code
Data Contents
00
Manual torque boost
Torque boost
A041/A241
01
Automatic torque boost
Manual torque boost
A042/A242/
A342
0.0-20.0
Unit:
%
Level corresponding to output
Voltage (100%)
Manual torque boost
break point
A043/A243/
A343
0.0-50.0
Unit:
%
Level corresponding to base
frequency
(1) Manual torque boost
The values set up with A042/A242/A342 and A043/A243/A343 is outputted.
A042/A242/A342 sets a percentage level where the base frequency voltage is 100%.
The level set is the value of torque boost output voltage at 0 Hz.
When using the manual torque boost, it should be noted that overuse will cause saturation of the motor and
may cause damage.
The manual torque boost break point is the frequency at which the voltage torgue boost is switched off and
normal operation resumes.
To change of A041,A042,A043/ A241,A242,A343/A342,A343 an intelligent input needs to be set to
08(SET)/17(SET3) and switched on.
0
f6
f7
V6
V7
Voltage to output or AVR
voltage
Output voltage(V)
Output frequency(Hz)
A041/A241 : 1
st
/2
nd
torque boost selection
A042/A242/A342:1
st
/2
nd
/3
rd
manual operation torque
boost
A043/A243/A343:1
st
/2
nd
/3
rd
manual operation torque
boost break point
H003/H203:1
st
/2
nd
motor capacity selection
Relation
Output frequency
Base frequency
(100%)
A042/A242/A342
A043/A243/A343
100
Output
voltage
