Siemens SIMOTICS L-1FN3 Configuration Manual page 63

If the primary section precision cooler is not used, the temperatures on the surface of the
motor may exceed 100 °C.
Secondary section cooling / thermal insulation of the secondary section
The secondary section cooling dissipates 5% to 8% of the total power loss of the motor
under rated conditions.
The standard cooling circuit for the secondary sections comprises heatsink profiles and two
combi distributors as secondary section end pieces.
Secondary section cooling is required in the following circumstances:
● Applications with high heat loss entries in the secondary sections
● Applications, where the machine bed does not ensure that heat is dissipated through the
contact surface to the secondary sections
NOTICE
Secondary section cooling is required for large motors
For motors of sizes 1FN3600 and 1FN3900, secondary section cooling is imperative for the
proper function of the motors. The large amount of heat transferred from the primary
section to the secondary sections cannot be dissipated to the machine bed via the
secondary sections' contact surfaces.
• Ensure that secondary section cooling is used for these large motors.
Secondary section cooling components
You usually require heatsink profiles and secondary section end pieces for cooling the
secondary sections of motors in the 1FN3 product family.
1FN3 linear motors
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
Mechanical properties
3.1 Cooling
61