Section 5: Configuration of the frequency converter
U/Umax
U/Umax
100%
100%
f/fn
f/fn
P
ar
.
1.
52
U/f linear
U/f square-law
a)
b)
F1
F0
U0
U1
100%
P
ar
.
1.
50
Par. 1.51
Par. 1.53
Pic. 5.3. Linear and square-law characteristics (a),
shaping the U/f characteristic (b)
In the "U/f square-law" operating mode, the characteristics are limited to the
initial points U0, f0.
5.5. Operation in vector mode
Vector sensorless operation mode is available on the AFC200 frequency
converter. In order for the converter to operate in this mode, it is necessary to
run an identification run beforehand.
Caution!
Incorrect entry of the nominal motor data described in section 4.2 may
destroy the motor during the identification run.
In order to start the identification run procedure, set par. 1.10 "ID run" to "1",
confirm with the button
and wait a few seconds - the duration of the
identification run is signaled by the green "RUN" LED. After its termination,
par. 1.20 "Operating mode" should be set to "3" -vector. After each motor
change, the identification procedure must be repeated.
Caution:
1. In vector mode, the U/f characteristics shaping parameters described in
section 5.4 are inactive.
2. The frequency converter must be in scalar mode when performing "ID Run"
(par. 1.20 = 0).
30
TWERD Power Electronics