Mechanical Properties; Cooling - Siemens SIMOTICS T-1FW6 Series Configuration Manual

Mechanical properties

3.1

Cooling

The power loss generated by the stator winding must be dissipated. To achieve this, the
stator is equipped with cooling ribs to increase the overall surface area.
For natural cooling, the rated torque M
with respect to its surroundings. For instance, this is influenced by the following factors:
● Thermal contact to the machine
● Temperature difference to the environment
● Flow velocity of the cooling air
● Increased surface area as a result of the cooling ribs
When very unfavorably installed under certain circumstances, heat cannot be dissipated
through the peripheral motor surface. This can result in a reduction of the S1 characteristic.
In certain operating statuses (e.g. at high speeds or in S1 mode), the rotor temperature can
increase due to iron loss.
The rotor power loss is specified in the "Technical data and characteristics" chapter in the
"Rotor power loss with respect to speed" characteristics.
The rated motor torques specified in the data sheets (see "Technical data and
characteristics") are valid for natural cooling and a rotor flange temperature of max. 60 °C.
To ensure that these conditions are maintained, additional measures may have to be taken
to cool the rotor.
NOTICE
Demagnetization of the rotor magnets
If the heat from the rotor cannot be sufficiently dissipated via the flange, this can cause the
rotor to heat up excessively in the upper speed range in S1 mode, which could
demagnetize the magnets.
• Ensure that the rotor does not exceed the maximum temperature of 120 °C.
Naturally cooled 1FW6 built-in torque motors
Configuration Manual, 07/2017, 6SN1197-0AE01-0BP3
depends on the thermal conductivity of the motor
N
3
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