Table 3-27 V/F Characteristic (Parameter P1300) - Siemens MICROMASTER 420 Operating Instructions Manual

3 Functions
Fig. 3-61
There are several versions of the V/f characteristic as shown in Table 3-27.
Table 3-27
Parameter
value
0
1
2
3
144
U, M, P,
M ,
n n
U, P
Voltage control range
Operating ranges and characteristics of an induction motor when fed from a
drive inverter
V/f characteristic (parameter P1300)
Significance Use / property
Linear Standard case
character-
istic
FCC Characteristic which compensates the voltage losses of the stator
resistance for static (steady-state) or dynamic loads (flux current control
FCC). This is especially used for small motors which have a relatively high
stator resistance. Refer to Section 3.21.1.2.
Square-law This is a characteristic which
character- takes into consideration the
istic torque characteristic of the driven
load (e.g. fan / pump)
a) Square-law characteristic
2
(f characteristic)
b) Energy saving as the lower
voltage also results in lower
currents and losses.
Programm- Characteristic which takes into
able consideration the torque
character- characteristic of the motor /
istic driven load (e.g. synchronous
motor).
U, P
Rated motor
operating point
M,
Field control range
f f
n max
V
V
n
P1300 = 0
0
V
V
n
P1300 = 2
0
V
V
max
r0071
V
n
P0304
P1300 = 3
P1325
P1323
P1321
P1310
f0 f1 f2
0 Hz P1320 P1322
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
Issue 07/04
f
f
f
n
f
f
n
f
f3 f f
n max
P1324 P0310 P1082