Siemens EK 726 Series Manuale di Servizio Pagina 20

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TECHNICAL DESCRIPTION
MICROMASTER
MICROMASTER Vector
MIDIMASTER Vector
SIEMENS DA 64 – 2002/2003
Version D 2/6
2.1.12 MICRO/MIDIMASTER Vector (sensorless vector control)
This control type is preferably used for single drives with asynchronous motors where the requirements placed on the dynamic
response range from low to high, and for speed control ranges up to 1:10. It is suitable for most industrial applications, for example,
extruders, packaging machines, industrial washing machines, lifts and cranes.
·
·
·
·
·
·
¦
Ramp-up/
ramp-down
generator
I
Start
*
d
n
*/d
t
+
+
+
+
M
Acc.
I
µ
*
n controller
+
f
slip
f > f
s
f < f
s
EMF computer
for pre-control
I
µ
controller
M*
¯
I
W
*
I W *
M*
IW
controller
+
+
+
+
Coord
trans-
former
V
*
V
d
-
correction
g
atin
g
unit
VSt
α
Gating
unit
+
+
f
f
°
Motor model
with vecto
r
transf ormation
Drive inverter
V
I
Load
control
Effective for f > f
s
Iw
ist
I
ist
n calculated
M
·
n*
-
2.1.13 Torque and speed response
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