105
F5.00
V/F curve setting
0~5
0
This group of parameters are used to define motor V/F
setting mode to cater for different load characteristic.
Five fixed curves and one user-defined curve can be
selected according to the setting of F5.00.
0: linear curve
Linear curve is suitable for common constant
torque type load, output voltage and output
frequency are in linear relation, as straight line 0
showed in Fig. F5-1.
1: decreasing torque curve 1(power of 1.3)
Decreasing torque curve 1, output voltage value is
output frequency value to the power of 1.3, as curve 1
showed in Fig. F5-1.
2: decreasing torque curve 2(power of 1.5)
Decreasing torque curve 2, output voltage value is
output frequency value to the power of 1.5, as curve 2
showed in Fig. F5-1.
3: decreasing torque curve 3(power of 1.7)
Decreasing toque curve 3, output voltage value is
output frequency value to the power of 1.7, as curve 3
showed in Fig. F5-1.
4: square curve
Square curve is suitable for square torque type
load such as draught fan and water pump to achieve
the optimum energy-saving effect. Output voltage
value is output frequency value to the second power,
as curve 4 showed in Fig. F5-1.
Fig. F5-1 V/F Curve
5: user-defined V/F curve (determined by
F5.01~F5.06)
When set F5.00 as 5, users can customize V/F
curve
via
F5.01~F5.06,
by
adding
(V1,F1),
(V2,F2),(V3,F3), origin, and max. freq. point to form a
broken line,so as to meet special load characteristic.
The curve is as showed in Fig. F5-2.
F5.01
V/F frequency value F1
0.00~frequency value F2
12.50
F5.02
V/F voltage value V1
0.0~voltage value V2
25.0%
F5.03
V/F frequency value F2
