Siemens S120 Manual Do Utilizador
Motor components of the built-in motor and options
3.3 Cooling
During continuous operation, the motor can only be loaded to the extent that the effective
continuous torque M
eff
does not exceed the rated torque M
N
. As a result, therefore, the
effective power loss cannot exceed the rated power loss P
V,N
.
⎟
⎜
0
HII
If the actual effective loss is impossible to predict or too complex to calculate, the total
combined continuous power loss (table values) of all the motors deployed can be used
instead to calculate the required cooling power.
In this case, the resulting discrepancy vis-à-vis the actual effective power loss may mean
In this case, the resulting discrepancy vis-à-vis the actual effective power loss may mean
that the cooling system is overdimensioned.
The cooling system must be sufficiently powerful to ensure the required coolant pressure
The cooling system must be sufficiently powerful to ensure the required coolant pressure
even at the maximum volume flow rate.
3.3.2
Coolant
Provision of the cooling medium
The customer must provide the cooling medium. Only water with anti-corrosion agent should
be used as the cooling medium.
WARNING
Oil must not be used as a coolant because it is incompatible with materials used in motors
with a cooling jacket and may cause O-rings to corrode. In motors with integrated cooling,
oil can corrode the hoses of the cooling system inside the motor.
Reason for the use of water with an anti-corrosion agent
The use of untreated water may lead to considerable damage and malfunctions due to water
hardness deposits, the formation of algae and slime, as well as corrosion, for example:
● Worsening of the heat transfer
● Higher pressure losses due to reductions in cross-sectional area
● Blockage of nozzles, valves, heat exchangers and cooling ducts
For this reason, water as a cooling medium must contain an anti-corrosion agent that reliably
● Worsening of the heat transfer
● Higher pressure losses due to reductions in cross-sectional area
● Blockage of nozzles, valves, heat exchangers and cooling ducts
For this reason, water as a cooling medium must contain an anti-corrosion agent that reliably
prevents deposits and corrosion even under extreme conditions.
1FW6 Built-in torque motors
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Configuration Manual, 05/2009, 6SN1197-0AE00-0BP3