Siemens Simotics M-1FE1 Series, Руководство по настройке

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Motor components, characteristics and options
4.1 Motor components
SIMOTICS M-1FE1 synchronous built-in motors
64
Configuration Manual, 09/2019, A5E47872980B AA
4.1.3.4 Cooling powers to be dissipated (power loss)
You can determine the cooling power to be dissipated based on:
● Reading off the power loss at rated power for
n
max
or
n
N
in the table "Cooling powers
to be dissipated".
● Using the calculation tool.
The power loss can be calculated within the shaded area of the subsequent diagram
for any load state and speed. P and n must lie within the shaded area. The general
conditions
③
and
④
must be complied with.
①
Cooling power to be dissipated at rated speed
②
Cooling power to be dissipated at maximum speed
③
For
n
<
n
N
, the following applies:
P
≤
P
N
x
n
/
n
V
④
For
n
N
<
n
<
n
max
, the following applies:
P
≤
P
N
Figure 4-4 Calculating the power loss
You can calculate the power loss using the following program: Tool to calculate the
total power loss ( https://support.industry.siemens.com/cs/ww/de/view/109771175 )
The intermediate values of the cooling power can be interpolated linearly in the ratio
to the speed.
The cooling power to be dissipated depends on the rated power
P
N
of the motor. If the
motor is operated with reduced power, then the cooling power to be dissipated
decreases in an approximately linear relationship.