SIEMENS
6/9
Siemens MD 50.8 · 2017
Motor options
Mechanical design
Degrees of protection
6
■
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 in frame sizes 71 to 132 can be
equipped with a high inertia fan.
High inertia fans as an additional inertia are finely balanced
according to ISO 1940. Typical applications are drives for
traveling gear, conveying equipment, or in general for
supporting soft starting and/or soft braking in 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
IP65
Possible in conjunction with a brake, backstop, separately driven fan, incremental encoder,
absolute encoder, resolver, and motor plug.
K03
Motor frame size
Fan
Material
Order code
Fan
Fan cover
63 ... 90
Standard fan
Plastic
Sheet metal
-
Metal fan
Aluminum
M21
High inertia fan
Steel core with plastic fan
blades
M22
100 ... 132
Standard fan
Plastic
Sheet metal
-
Metal fan
Aluminum
M21
High inertia fan
Cast iron
M22
Order code:
Metal fan
M21
Order code:
High inertia fan
M22
Motor frame size
J
Z
m
fan
10
-4
kgm
2
kg
71
17.1
1.38
80
27.9
1.75
90
54.0
2.55
100
116.0
3.30
112
230.0
5.30
132
562.0
9.10
Cooling and ventilation
© Siemens AG 2017