Cooling Powers To Be Dissipated (Power Loss) - Siemens SIMOTICS M-1FE1 Configuration Manual

Motor components, characteristics and options
4.1 Motor components
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
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
①
②
③
④
Figure 4-4
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
motor is operated with reduced power, then the cooling power to be dissipated
decreases in an approximately linear relationship.
64
③ ④
and must be complied with.
Cooling power to be dissipated at rated speed
Cooling power to be dissipated at maximum speed
n n
For < , the following applies:
N
n n n
For < < , the following applies:
N max
Calculating the power loss
n n
or in the table "Cooling powers
max N
P P n n
≤ x /
N V
P P
≤
N
SIMOTICS M-1FE1 synchronous built-in motors
Configuration Manual, 09/2019, A5E47872980B AA
P
of the motor. If the
N