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12 Functional Descriptions 08.96
12.33.1 Introduction
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Function generator
for FFT analysis
(speed controller)
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Filter 1
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Filter 2
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611D:
Speed feedforward
control setpoint
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Speed
setpoint filter
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Speed
setpoint limitation
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Speed
controller P gain
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611D:
Weight compensation/
feedforward control torque
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Torque setpoint
limitation
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Torque setpoint
limitation
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Speed controller
reset time
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Integrator
feedback
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Speed actual value
monitoring
torque setpoint
limitation = 0
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Torque- to-cross-
current conversion
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Current setpoint filter
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Current setpoint limitation
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MSD field control
FDD field setpoint =0
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Ust
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Ust
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Filter 4
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Filter 3
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Filter 2
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Filter 1
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iq
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set
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set
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act
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ENC
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U
dq
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U
RST
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Function generator
for FFT analysis
(current controller)
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Current control
loop
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Speed control loop
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611D:
Filters 1-4 in current
controller
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n
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set
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&
Fig. 12-1 Overview of speed and current control loops
12–332
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)