“A” Group: Standard Functions
Configur
ing
Dr
iv
e P
a
ra
m
e
ters
3–14
Voltage Gain –
Using parameter A_45 you
can modify the voltage gain of the inverter (see
graph at right). This is specified as a percent-
age of the full scale setting (Automatic Voltage
Regulation) AVR level in parameter F_03. The
gain can be set from 50% to 100%. It should be
adjusted in accordance with the motor specifi-
cations.
The following table shows the methods of
torque control selection.
A 45
V
100%
50%
Hz
Voltage Gain
0
“A” Function
Run
Mode
Edit
Defaults
Func.
Code
Name /
SRW Display
Description
–FE
(CE)
–FU
(UL)
–FR
(Jpn)
Units
A_41 Torque boost method
selection
Two options:
00 ...Manual torque boost
01 ...Automatic torque boost
✘
00
00
00
—
V-Boost Mode 0
A_42 Manual torque boost
value
Can boost starting torque
between 0 and 99% above
normal V/f curve, from 0 to
1/2 base frequency
✔
11
11
11
—
V-Boost code 11
A_43 Manual torque boost
frequency adjustment
Sets the frequency of the V/f
breakpoint A in graph (top of
previous page) for torque boost
✔
10.0
10.0
10.0
%
V-Boost F 10.0%
A_44 V/f characteristic curve
selection
Two available V/f curves;
three select codes:
00 ...Constant torque
01 ...Reduced torque
✘
00
00
00
—
CONTROL SLV
A_45 V/f gain setting
Sets voltage gain of the inverter
from 50 to 100%
✔
100
100
100
%
V-Gain 100%
