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7-15
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
Example of the operating characteristic curve of a stepper motor:
Torque increase from boost
Torque drop from PWM
Maximum permissible
operating torque
Start/Stop
SS (J = 0)
(
)
M
M1
M2
3
1,8
0
M0
M
Load
M
b1
M
b2
5
3,4
0,6
J
[Nm]
[kg
@
cm
2
]
f
max
e.g. 500 increments/revolution
J
Load
n
f [Hz]
10
100 f1 f0
1 000
f
eg
10 000
12
120
1 200
n [1/min]
[1/min]
3
0
Fig. 7-5
Operating Characteristic Curve of the Stepper Motor
When you evaluate this example characteristic in accordance with the algo-
rithm in Figure 7-6, you determine the following machine data:
MD54 = 100 Hz
Start/Stop frequency f
ss
MD55 = 3 000 Hz
Frequency value
f
eg
MD57 = 218 000 Hz/s
Acceleration 1 (f
v
f
eg
)
MD58 = 109 000 Hz/s
Acceleration 2 (f >
f
eg
)
MD59 = 0
Deceleration 1 = acceleration 1
MD60 = 0
Deceleration 1 = acceleration
Operating Charac-
teristic Curve
Determining the
Machine Data
Starting up the FM 453
Summary of Contents for SIMATIC FM 453
Page 6: ...vi FM 453 Servo Drive Step Drive Positioning Module C79000 G7076 C453 01 Preface ...
Page 14: ...xiv FM 453 Servo Drive Step Drive Positioning Module C79000 G7076 C453 01 Table of Contents ...
Page 378: ...Index 6 FM 453 Servo Drive Step Drive Positioning Module C79000 G7076 C453 01 Index ...