Speed-Dependent Current Setpoint Filter; Machine Data; Description - Siemens SINUMERIK 840C Installation Instructions Manual

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08.96
12.33.4
A speed-dependent current setpoint filter (torque setpoint smoothing) allows the user to reduce
the speed ripple at higher speeds (MSD + FDD).
12.33.4.1
MD 1245:
MD 1246:
12.33.4.2
If the threshold value is set to 0, then the filter remains active as a low-pass over the entire
speed range. When other values are set, the settings in
MD 1245:
MD 1246:
are used to calculate two switchover speeds:
n
upper
n
lower
The low-pass function is activated then the absolute actual speed value exceeds the value
n
upper
actual speed value drops below n
If the hysteresis is set to zero, then the two switchover speeds are identical.
Note
The speed threshold is effective only when filter 2 is configured as a low pass. This machine
data has no effect on the closed-loop control.
Filter type
(2nd current setpoint filter)
Fig. 12-8
© Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
More user manuals on

Speed-dependent current setpoint filter

Machine data

Threshold speed-dependent torque setpoint smoothing
Hysteresis speed-dependent torque setpoint smoothing

Description

Threshold speed-dependent torque setpoint smoothing and
Hysteresis speed-dependent torque setpoint smoothing
=
n
+ n
threshold
hysteresis
=
n
– n
threshold
hysteresis
(In
I n
). Vice versa, the low-pass function is deactivated when the absolute
act
upper
Bypass
Speed n
n
upper
n
threshold
n
lower
Threshold of speed-dependent torque setpoint smoothing
ManualsBase.com
12.33.4 Speed-dependent current setpoint filter
=
MD 1245 + MD 1246
=
MD 1245 – MD 1246
(In
I < n
).
lower
act
lower
Low pass
6FC5197- AA50
12 Functional Descriptions
Bypass
MD 1246
MD 1245
MD 1246
12–347

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