Siemens SINAMICS DCM Manual página 820

1U1 1V1 1W1
To Ia sensing
[6850]
To line voltage sensing
[6950]
X177.29
Thyristor
u AI 2
bridge
±10 V
X177.30
A
Effective gain
1C 1D
<1> Only effective if p51854 = 1, 2.
The following applies for p51854 = 0 1 or 2:
The device must be restarted.
<2> Only effective for series circuit with diode bridge (p51800 = 35, 45) and
device-internal armature voltage sensing (p51854 = 0).
1 2
DO: DC_CTRL
Field circuit control - Armature voltage/EMF actual value sensing
Cont in DC cct
p50098 (0)
Line contactor
1
r53081.0
1
0
Va_sens AI V_ref
10.000...2000.000 [V]
10 V = 100 %
p51855 (10.000)
<1>
1 ms
A
Conversion to
volts
D
1,2
Conversion to
volts 0
D
Va_sens config
0...2
p51854 (0)
2
0
0,1
3 4
Ia act 1 cyc [%]
r52114
[6851.6]
0.000...4000.000 [Ÿ]
p50110[D] (0.000)
Ia_convert U diode
50.00...100.00 [%]
p51798 (85.00)
U
a slave
Arm I_incr [A/s]
[6850.7] r52104
<2> 0.000...1000000.000 [mH]
0 V
p50111[D] (0.000)
+
0
Mean value
+
between
1
2 firing pulses
Ua act [V]
r50038
Ua scan_values [V]
r52951[0] [6950.3]
RMS value over
6 cycles
V_supp rated val
Armature 1U1/1V1/1W1
10...2000 [Vrms]
p50078[0] (400)
1.35
Average value
5
fp_6902_13_eng.vsd
02.10.18 V01.05.00
Ia act 6 cyc [%] Mot P supp avg [%]
r52109
[6851.6]
Ra
EMF act abs avg [%]
i
a
10 ms
EMF act [V]
r50037
–
+
–
La
Ua act signed [%]
P_act ohm load [%]
Ia_act rms [%]
r52126
[6851.5]
6 7
Function diagram
SINAMICS DCM
250 μs
r52307
r52286
[6900.2]
EMF act avg [%]
r52287
[6810.1]
[6852.2]
[8046.1]
EMF act sign [%]
r52123
[6852.4]
Ua act abs [%]
r52291
r52292
[6851.6]
r52124
Ua_act rms [%]
r52127
U_out 1C/1D [%]
r52297
8
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