Function modules
8.12 Moment of inertia estimator
Drive functions
584
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Determining the load torque
The load torque must first be determined to determine the moment of inertia.
Phases with constant speed not equal to zero are required to determine the load torque (e.g.
friction force). For small speed changes, the converter calculates the load torque M
L
from the
actual motor torque. The following conditions must be satisfied to do this:
●
Speed ≥ p1226
●
Acceleration setpoint < 8 1/s
2
●
Acceleration · moment of inertia (r1493) < 0.9 · p1560.
After determining the load torque, the moment of inertia can be determined in the
acceleration phases. If the source of p1502 has a 1 signal, the moment of inertia is not
estimated.
The accuracy of the moment of inertia estimation increases as the acceleration rate
increases. The start value of the moment of inertia estimator is the parameterized moment of
inertia (J = p0341
·
p0342
+
p1498).
Содержание SINAMICS S120
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Страница 24: ...Contents Drive functions 24 Function Manual 11 2017 6SL3097 4AB00 0BP5 ...
Страница 202: ...Servo control 4 21 Voltage precontrol Drive functions 202 Function Manual 11 2017 6SL3097 4AB00 0BP5 ...
Страница 296: ...Vector control 5 23 Asynchronous pulse frequency Drive functions 296 Function Manual 11 2017 6SL3097 4AB00 0BP5 ...
Страница 312: ...V f control vector control 6 5 Vdc control Drive functions 312 Function Manual 11 2017 6SL3097 4AB00 0BP5 ...
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Страница 1044: ...Appendix A 2 Documentation overview Drive functions 1044 Function Manual 11 2017 6SL3097 4AB00 0BP5 A 2 Documentation overview ...
Страница 1082: ...Appendix A 7 Functions of SINAMICS S120 Combi Drive functions 1082 Function Manual 11 2017 6SL3097 4AB00 0BP5 ...
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