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Motor components of the built-in motor and options
3.3 Cooling
Temp–F
Temp–F supplies an analog signal that is proportional to the temperature and for a
symmetrical current load of the three-phase windings provides information about the average
motor temperature.
Note
The temperature sensor (Temp–F) only senses the winding temperature between two
The temperature sensor (Temp–F) only senses the winding temperature between two
phases or in one phase in the stator. However, the phases in the synchronous motor are
loaded to different degrees depending on the particular operating mode, so that in the worst
case, the phases that have not been measured have the higher temperatures.
3.3
Cooling
The heat loss generated by the stator winding must be dissipated by a water-cooling system.
For this purpose, the machine manufacturer must connect the cooling duct to a cooling
circuit in a heat-exchanger unit. For characteristic curves indicating a rise in temperature and
drop in pressure of the cooling medium between the inlet and return flow circuit in the cooler
as a function of the volume flow rate, see "Technical data and characteristics".
In certain operating statuses (e.g. at high speeds or in S1 mode), the rotor can heat up
In certain operating statuses (e.g. at high speeds or in S1 mode), the rotor can heat up
further due to iron loss. The rated motor torques specified in the data sheets (see "Technical
data and characteristics") are valid during operation with water cooling with an inlet
temperature of 35 °C 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
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.
Note
Depending on the load and operating mode, the average temperature in the stator and rotor
Depending on the load and operating mode, the average temperature in the stator and rotor
can reach 120°C. Different temperature conditions in the stator and rotor can cause the
motor components to expand. The amount of heat transferred into the machine construction
as well as the radial and axial thermal expansion of the motor must be taken into account in
the design.
1FW6 Built-in torque motors
Configuration Manual, 05/2009, 6SN1197-0AD00-0BP7
Configuration Manual, 05/2009, 6SN1197-0AD00-0BP7
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