Torque Setpoint Limitation - Siemens SINAMICS S120 Function Manual

Operating Modes
Servo control
3.1.5

Torque setpoint limitation

Description
The steps required for limiting the torque setpoint are as follows:
1. Define the torque setpoint and an additional torque setpoint
2. Generate torque limits
The torque setpoint can be limited to a maximum permissible value in all four
quadrants. Different limits can be parameterized for motor and regenerative modes.
M_
set before
torque limiting
r
1509
Setpoint of torque-
generating current
I _
q
set_2
[5710.8]
:
CO Upper effective
torque limit
r
1538
[5640.8]
:
CO Lower effective
torque limit
r
1539
[5640.8]
Torque factor M2
[5718.4]
Fig. 3-9
Note
This function is effective immediately without any settings. The user can also
define further settings for limiting the torque.
3-74
Current/torque setpoint limiting
[A]
The 4 quadrants
2
Reverse,
generating
–
Reverse,
motoring
3
© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition
M_
set total
r
0079
I _
q
set
r
0077
M
+
1
Forwards,
motoring
+
n
Forwards,
generating
4