Description
3.4 Design
3.4.4.2
Technical features of temperature sensors
Technical features of PTC temperature sensors
Every PTC temperature has a "quasi-switching" characteristic. The resistance suddenly increases
in the vicinity of the response threshold (nominal response temperature ϑ
PTC temperature sensors have a low thermal capacity - and have good thermal contact
with the motor winding. As a consequence, the temperature sensors and the system quickly
respond to inadmissibly high motor winding temperatures.
Table 3-9
Name
Type
Response threshold
(nominal response temperature ϑ
Resistance when cold R (20 °C) in the PTC triplet
and in the individual PTC temperature sensor
54
Technical data of the PTC temperature sensors
)
NAT
Description
PTC triplet acc. to DIN 44082
Individual PTC temperature sensor according to
DIN 44081
150 °C ± 5 K
130 °C ± 5 K
80 °C ± 5 K
See characteristic
at -20 °C < T < ϑ
-20 K
NAT
R ≤ 3 x 250 Ω + 1 x 250 Ω
R ≤ 1000 Ω
Operating Instructions, 09/2022, A5E52220812B AA
).
NAT
1FW6 built-in torque motors