Selection Of The Primary Sections - Siemens SIMOTICS L-1FN3 Configuration Manual

Configuration
5.2 Configuring workflow
Calculation of the effective force of the duty cycle
In addition to the peak force, the required effective force of the duty cycle of the motor is
decisive for its dimensioning. The
is calculated from the square mean of the motor force over the entire time Δt
sequence of motion and must not exceed the rated force F
When the motor force is constant over sections, this simplifies the integral for the sum, as
shown in the following figure:
Figure 5-8
The equations stated above apply to calculation of the effective forces. For more precise
calculations, the forces must be replaced by the corresponding currents and the rms current
determined. Here the effects of the motor saturation must be taken into account.
5.2.4

Selection of the primary sections

Requirements relating to the primary section
Whether a primary section can fulfill the requirements from the duty cycle, depends on the
following items:
● Rated force F
value of the effective force of the duty cycle F
● The primary section should have approximately 10% control reserve over the required
peak load force F
oscillate.
114
maximum
Effective force of the duty cycle with motor force constant over sections
of the primary section must be greater than or equal to the calculated
N
, in order to avoid undesired limitation effects when control circuits
L,MAX
effective force of the duty cycle of the motor F
:
N
.
eff
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
eff
of a
ges
1FN3 linear motors