Lenze AC Tech M3103S Installation & Operation Manual page 55

HP
0.25 - 1
1.5 - 2
3
5
7.5
10
The diagram below illustrates how FX BOOST alters the V/Hz ratio to increase motor
torque .
The FX BOOST setting represents the amount of boost at 0 Hz (approximately 15% in the
example below), and as the output frequency approaches 30 Hz, the boost decreases to
zero . Therefore, at 30 Hz and above, the V/Hz ratio returns to its "normal" state .
100
90
80
70
60
FX BOOST
50
40
30
20
10
TORQUE
22
This parameter is used to select whether the output of the drive follows a constant or
variable V/Hz curve . The following selections are available:
CONSTANT
VARIABLE
CT / NOCMP
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
FX BOOST FACTORY DEFAULT SETTINGS
FACTORY
DEFAULT
5.30 %
4.40 %
3.60 %
3.00 %
2.70 %
2.40 %
CONSTANT V/Hz
10
20
OUTPUT FREQUENCY (Hz)
(TORQUE CURVE SELECTION)
Use for constant torque applications to optimize torque .
Use for variable torque applications to optimize energy savings .
Use for constant torque applications that require full overload
capacity at low speeds (refer to Parameter 17 - MOTOR OL) .
HP
15
20
25
30
40
50 - 60
40
30
M301L
FACTORY
DEFAULT
2.20 %
2.00 %
1.80 %
1.60 %
1.20 %
0.80 %
50 60
51