Siemens SIMOTICS S-1FT7 - Page 40

Mechanical properties
3.1 Cooling
S-1FT7 synchronous motors
38 Configuration Manual, 09/2018, A5E45099423B AA
Thermally insulated mounting without additionally mounted components
For non-ventilated and force-ventilated motors, the static motor torque must be reduced by
between 5% and 15%. We recommend configuring the static torque of the motor using the
M
0 (60 K)
values. As the speed increases, the reduction factor rises, see figure "Effect of the
mounting conditions on the S1 characteristic curve".
Thermally insulated mounting with additionally mounted components
● Holding brake (integrated in the motor): No additional torque reduction required
● Gearbox: Torque reduction is required, see figure "Effect of the mounting conditions on
the S1 characteristic curve".
Effect of thermally insulated/non-insulated mounting without and with gearbox
A
Non-insulated mounting
1
Characteristic without mounted gearbox
2
Characteristic with mounted gearbox
B
Insulated mounting
1
Characteristic without mounted gearbox
2
Characteristic with mounted gearbox
Figure 3-1 Effect of the mounting conditions on the S1 characteristic curve