Siemens SINAMICS G115D

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6SHHG
6HWSRLQW
6SHHG
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Function
From the actual speed, the actual motor torque and the frictional torque of the load, the
converter calculates the total moment of inertia of the load and motor.
6SHHG
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When using the moment of inertia estimator, we recommend that you also activate the
friction characteristic.
Friction characteristic (Page297)
How does the converter calculate the load torque?
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0
6SHHG
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At low speeds, the converter calculates the load torque M
L
from the actual motor torque.
The calculation takes place under the following conditions:
• Speed ≥ p1226
• Acceleration setpoint < 8 1/s
2
(≙ speed change 480rpm per s)
• Acceleration × moment of inertia (r1493) < 0.9 × p1560
How does the converter calculate the moment of inertia?
Advanced commissioning
7.20Motor control
SINAMICS G115D Wall Mounted distributed drive
300 Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA