Siemens SIMOTICS S-1FK2 Series Configuration Manual page 56

Configuration
5.2 Configuring procedure
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:
M_max
S1
Figure 5-3
3. Select a motor that satisfies the requirements of S1 duty.
❒
54
, M ~ n or P = constant.
2
S1 duty (continuous operation)
Curve of the maximum torque
S1 characteristic
Motor selection for a duty cycle with constant switch-on duration
M_const_over Curve of the overload torque
M_const_base Curve of the base load torque
1FK2 synchronous motors for SINAMICS S120
Configuration Manual, 06/2019, A5E46927724B AB