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Mechanical properties
3.1
Cooling
3.1.1
Natural cooling
On naturally cooled motors, the heat loss is dissipated through thermal conduction, radiation
and natural convection.
Some of the heat loss is dissipated through the mounting surface of the motor. With large
motors, heat is dissipated via the base frame (steel plate).
Note the specifications on thermally non-insulated mounting and on thermally insulated
mounting.
Note
To ensure enough heat is dissipated, a minimum clearance to adjacent components of
100 mm must be kept free on three side surfaces.
● Mount the motor so that there is enough clearance around it for the power loss to be
thermally radiated.
The motor ratings apply at an ambient temperature of 40 °C (104 °F). If the ambient
temperature exceeds 40 °C (104 °F), you must adjust the torque and power of the motor
accordingly.
● Adjust the torque or the power of the motor at the converter based on the table in Chapter
"Derating factors (Page 32)."
Follow the operating instructions of the converter.
Fasten the base frame to the mounting surface thermally conductively.
Non-thermally insulated mounting
For the specified motor data, the following mounting conditions apply:
Table 3- 1
Shaft height
36 and 48
63 to 100
132
For larger mounting surfaces, the heat dissipation conditions improve.
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
Non-thermally insulated mounting conditions
Steel plate, width x height x thick-
ness in mm
120 x 100 x 40
450 x 370 x 30
550 x 380 x 35
Mounting
Base plate
surface in m
2
Width x depth
in mm
0.012
150 x 350
0.17
500 x 1500
0.21
550 x 2500
3
Surface of the
base plate
in m
2
0.053
0.75
1.38
37
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