Siemens SIMOTICS S-1FK2 Configuration Manual page 71

Duty cycles with constant ON duration
For duty cycles with constant ON duration, there are specific requirements for the torque
characteristic curve as a function of the speed, for example:
M = constant, M ~ n
Figure 5-2
The drives with this load cycle typically operate at a stationary operating point.
Procedure
1. Configure a base load for the stationary operating point. The base load torque must lie below
the S1 characteristic.
2. In the event of transient overloads (e.g. during acceleration), configure an overload.
Calculate the overload current in relation to the required overload torque. The overload
torque must lie below the M_max characteristic.
In summary, the motor is configured as follows:
Figure 5-3
3. Select a motor that satisfies the requirements of S1 duty.
1FK2 Synchronous Motors for SINAMICS S120
Configuration Manual, 02/2022, A5E46927724B AD
, M ~ n or P = constant.
2
S1 duty (continuous operation)
Ü
M_max Curve of the maximum torque
S1 S1 characteristic
Motor selection for a duty cycle with constant switch-on duration
5.2 Configuring procedure
M_const_ov Curve of the overload torque
er
M_const_ba Curve of the base load torque
se
Configuration
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