Siemens SIMOTICS T-1FW68, Configuration Manual

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Mechanical properties
3.1 Cooling
1FW68 radial segment motors
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Configuration Manual, 08/2021, A5E51132930B AA
Note
Thermal expansion of the motor
Temperature changes in the stator and rotor can cause motor components to expand.
• You must take into account the amount of heat transferred into the machine structure
as well as the radial and axial thermal expansion of the motor when designing the
machine.
3.1.1 Cooling circuits
Cooling circuit requirements
Avoid algae growth by using suitable chemical agents and opaque water hoses or tubes.
We recommend that the cooling circuits be designed as closed systems. The maximum
permissible pressure is 10 bar.
NOTICE
Blocked and clogged cooling circuits
Cooling circuits can become blocked and clogged as a result of pollution and longer-
term deposits.
• We recommend that you use a separate cooling circuit to cool the stator segments.
• If you use the machine cooling circuits to also cool the stator segments, you must
ensure that the cooling medium fully complies with the requirements listed in this
chapter.
• Also note the maximum non-operational times of cooling circuits corresponding to the
coolant manufacturer ’ s data.
Interconnecting cooling circuits
NOTICE
Leaks associated with rigid connections
Rigid connections between the cooling circuits can lead to problems with leaks.
• Use flexible connections (hoses) when interconnecting cooling circuits.