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“A” Group: Standard Functions
Configuring
Drive Parameters
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.
A45
V
1
00%
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%