92 Chapter 7 - Parameters Description
User Manual
P.060 = 2 (Quadratic )
The Quadratic characteristic is useful when a pump or fan has to be controlled (load where the torque is
proportional to the speed squared).
The factory setting, when this ratio is selected, provides a setting of
P.063
equal to the 0,25% the Max output
voltage, at a frequency equal to 50% of
P.062
.
P.061
P.062
(F.020)
V
F
(P.061 x 0.25)
P.062
2
P.120
Figure 7.6.6: Quadratic V/F shape
P.061 Max out voltage
(Maximum output voltage)
Maximum value of the voltage applied to the motor (normally set as the nameplate, see figure 7.6.3).
P.062 Base frequency
Rated frequency of the motor (given on the nameplate, see figure 7.6.3).
It represents the working frequency of the drive, at which the Max out voltage is associated (
P.061
).
P.063 V/f interm volt
(V/f intermediate voltage)
Intermediate "voltage" value of the V/F characteristic selected.
P.064 V/f interm freq
(V/f intermediate frequency)
Intermediate "frequency " value of the V/F characteristic selected.
N
OTE
!
When custom V/f shape is selected (
P.060
= 0):
P.064
parameter represents the return point of the output voltage, on the linear characteristic of V/f
ratio (see figure 7.6.4).
Code
Name
[Code] & Function.
Default
MIN
MAX
Unit
Variation
IPA
P.060
V/f shape
[0] Custom
1
0
2
412
[1] Linear
[2] Quadratic
P.061
Max out voltage
(**)
50
(**)
V
1
413
P.062
Base frequency
(**)
25
500
Hz
0.1
414
P.063
V/f interm volt
(**)
0
P.061
V
415
P.064
V/f interm freq
(**)
1
P.062
Hz
0.1
416
Ouput Frequency Limit
P.080 Max output freq
(Maximun output frequency)
It is the maximum level of the output frequency, expressed as percentage of
Max ref freq (F.020)
.
