Siemens SIMOTICS L-1FN3 Configuration Manual page 112

Configuration
5.2 Configuring workflow
Example
The 1FN3300-2WC00-0AA1 motor is to be run with maximum current from the cold
condition.
● I
● t
The motor can be operated for a maximum of 13 s at maximum current.
Intermittent duty S3
With intermittent duty S3, periods of load time Δt
periods of downtime Δt
then cools down again while at standstill. After a sufficient number of duty cycles with cycle
duration Δt
maximum value T
Figure 5-4
For currents I
In this respect, the cycle duration should not exceed 10% of the thermal time constant t
If a longer cycle duration is necessary, please contact your local Siemens office.
110
= 39.2 A, I = 12.6 A; this results in ν = 9.679
MAX N
= 120 s
TH
with no current feed. The motor heats up during the load time and
S
= Δt + Δt , the temperature characteristic oscillates between a constant
Spiel B S
and a constant minimum value T
o
Current and temperature characteristic for intermittent duty S3
< I ≤ I , it is not permissible that the rms current exceeds the rated current:
N M MAX
with constant current alternate with
B
; see figure below.
u
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
.
TH
1FN3 linear motors