Siemens EK 726 Series Manual de servicio Pagina 19

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TECHNICAL DESCRIPTION
MICROMASTER
MICROMASTER Vector
MIDIMASTER Vector
SIEMENS DA 64 – 2002/2003
2/5 Version D
2.1.10 MICROMASTER and MICRO/MIDIMASTER Vector (in the V/Hz mode)
V/Hz control for single and multi-motor drives with asynchronous motors where there are no special requirements placed on
dynamic response. This is the case, for example, for pumps and fans and basic drives for slides.
n*
Ramp-up/
ramp-down
generator
V/Hz characteristic
V
f
V*
V
d-
correction
V
d
V
st
f
Gating
unit
Open/close
Current
sensing
I
M
Inom (P083)
H/W
current
trip
Drive inverter
2.1.11 MICRO/MIDIMASTER Vector (in the FCC mode)
n*
Ramp-up/
ramp-down
generator
+
-
+
_
I
ist
Current
limiting
control
V
f
V/Hz characteristic
+
+
Effective for
f > f
s
Slip
compensation
Effective for f < f
s
FCC
V
m
V*
+
_
V
d
V
d
correction
Current
sensing
V
st
f
Gating
unit
M
I
V/Hz control without speed sensing
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