Motor Description
1.6 Cooling
1PH7/1-21
Siemens AG, 2004. All rights reserved
Induction Motors, 1PH7 (APH7S) – 05.04 Edition
1.6 Cooling
Note
1PH7 main spindle motors are force-ventilated. When mounting the motors, it
must be ensured that the motor can be well ventilated. This is especially true when
mounting the motors in enclosures. It is not permissible that the hot discharged air
is drawn in again.
!
Caution
Temperatures of over 100 °C can occur at the surface of the motor.
Mounting a fan and minimum clearance to the customers mounted parts and
components
The fan is axially mounted at the NDE.
The minimum clearance to the customer’s mounted parts and components and the
air discharge opening as well as the minimum clearance S between the air intake
and air discharge openings and adjacent components must be observed and main-
tained (refer to Table 1-4).
Table 1-4 Minimum clearances
Shaft height
[mm]
Clearance to the customer’s
mounted parts and compo-
nents [mm]
Clearance S [mm]
100 30 30
132 60 60
160 80 80
180 100 80
225 100 80
For air-cooled motors, the cooling ducts, through which the ambient air flows,
should be regularly cleaned depending on the degree of pollution at the mounting
location. These air ducts can be cleaned, e.g. using dry, oil-free compressed air.
For totally-enclosed fan-cooled motors, the inside of the motor can be cleaned
during standard service/maintenance intervals.
Air flow direction
Standard: from DE to NDE
Option: from NDE to DE (not for core types)
for SH 180 and SH 225, the motor length changes (dimension drawing)
Air discharge
SH 100 to 160: axial
SH 180 and 225: radial to the right (when viewing the DE); the fan can be
rotated through 4 x 90°
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