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2.6.5
Cooling
2.6.5.1
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. From large
motors, heat is dissipated via the base frame (steel plate).
The motor ratings apply in 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, see Chapter "Derating factors (Page 27)".
2.6.5.2
Forced ventilation
This cooling method is achieved using a separate ventilation unit with a fan that is driven
independently of the motor.
Operate the fan only with normal ambient air.
The direction of air flow is from the non-drive end (NDE) to the drive end (DE).
Deposits of contaminated air can impair the heat dissipation of the motor or block the cooling
duct and overheat the motor.
Maintain the minimum clearance between the air intake and discharge openings and
adjacent components (see the "Minimum clearance" diagram).
s
Figure 2-7
1FK7 G2 synchronous motors
Operating Instructions, 05/2021, A5E50907562B AA
A minimum clearance of 30 mm applies for SH 80
Minimum clearance s
Description of the motors
2.6 Mounting and options
43
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