12 Functional Descriptions 08.96
12.33.1 Introduction
Current
setpoint
limitation
Function
generator for
FFT analysis
(current
controller)

MSD field control

FDD field setpoint =0

Ust
–
d Ust
–
q
T S R
I
d
I
q
n
–
set
ENC
M
U
dq
U
RST
n
–
act iq
–
set
Filter 1
PT2:
MD 1202
MD 1203
Bandstop:
MD 1211
MD 1212
MD 1213
MD 1104
MD 1105
MD 1103
MD 1238
Field controller
MD 1120
MD 1121
a,bd,q
RST
a,b
I
R
I
S
Fig. 12-3 Overview of current control loop12–334
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SINUMERIK 840C (IA)