SIEMENS
11/8
Siemens MD 50.1 · 2015
Motor options
Mechanical design
Degrees of protection
11
■
Overview
Note:
The degree of protection only applies to the electrical equipment
(motor, brake, encoder). Depending on the application area,
the applicable measures must be applied to the gearbox.
Available degrees of protection
■
Overview
The motors have radial-flow fans, which cool regardless of
the direction of rotation of the motor (cooling method IC 411,
IEC 60034-6). The air flows from the non-drive end (NDE) to
the drive end (DE).
■
Self ventilation
The motor fan can either be a standard fan, metal fan, or
high inertia fan.
Fan design
Standard fan
As standard, the motors are equipped with a plastic fan.
This can be used for the entire standard ambient temperature
range.
Metal fan
As an alternative to the standard plastic fans, aluminum fans are
available for the motors.
Metal fans are used for specific environmental conditions, e.g.:
•
If there are solid or dirt particles, such as wood chips,
textile fibers in the cooling air
•
Special motor designs for increased ambient temperatures
exceeding +60 °C
High inertia fan
When required, 4-pole motors up to size 132 can be equipped
with a high inertia fan.
High inertia fans as additional inertia are finely balanced accord-
ing to DIN ISO 1940. Applications typically involve drives for
travel gear, conveying equipment or generally to support soft
starting and/or soft braking for line operation.
A high inertia fan increases the moment of inertia of the motor
according to the table below.
Degree of protection
Motor options that can be mounted
Order code
IP55
No restrictions
K01
IP56
1)
Possible in conjunction with external fan, incremental encoder and absolute encoder
K02
IP65
1)
Possible in conjunction with a brake, backstop, external fan, incremental encoder,
absolute encoder, resolver, and motor plug
K03
1)
Not possible for worm geared motors S
Motor size
Fan
Material
Order code
Fan
Fan cover
63 ... 90
Standard fan
Plastic
Sheet metal
Metal fan
Aluminum
Sheet metal
M21
High inertia fan
Steel core with plastic fan blades
Sheet metal
M22
100 ... 132
Standard fan
Plastic
Sheet metal
Metal fan
Aluminum
Sheet metal
M21
High inertia fan
Cast iron
Sheet metal
M22
160
Standard fan
Plastic
Sheet metal
Metal fan
Aluminum
Sheet metal
M21
180 ... 250
Standard fan
Plastic
Plastic / sheet metal
1)
Metal fan
Steel
Plastic / sheet metal
1)
M21
1)
The fan cover is made of sheet metal for motors with brake
Order code:
Metal fan
M21
Order code:
High inertia fan
1)
M22
1)
Not possible for worm geared motors S
Motor size
J
Z
m
fan
10
-4
kgm
2
kg
71
17.1
1.38
80
27.9
1.75
90S/90L
54.0
2.55
100L
116.0
3.30
112M
230.0
5.30
132S/132M/132ZM
562.0
9.10
Cooling and ventilation
© Siemens AG 2015