Siemens SIMOTICS T-1FW68, Configuration Manual

Page: 133 / 194

Technical data and characteristics
6.1 Explanations
1FW68 radial segment motors
Configuration Manual, 08/2021, A5E51132930B AA
131
Cooler data
Q
MAX
Maximum thermal power that is dissipated by the cooler when the stator
segment is utilized up to the rated torque M
N
and at rated temperature T
N
.
MIN
Recommended minimum volume flow rate in the cooler to achieve the rated
torque M
N
.
Δ T The temperature increase of the cooling medium between the intake and return
flow circuit of the cooler at the operating point Q
MAX
and
MIN
can be estimated
using the following formula:
average density of water: ρ = 1000 kg/m 3
average specific thermal capacity of water: c
p
= 4.18 ∙ 10 3 J/(kg K)
Temperature change with respect to the intake temperature: Δ T
H
in K
volume flow: in m
3
/s
Figure 6-2 Sample characteristic "Temperature increase of the coolant between the intake and
return of the cooler"
Δ p Pressure drop of the cooling medium between the intake and return of the
cooler for flow rate
MIN
.
Figure 6-3 Sample characteristic: "Pressure losses in the cooler with respect to the flow rate"