Technical data

Rexroth IndraDyn T Application Notes 9-7
DOK-MOTOR*-MBT********-PR03-EN-P
Furthermore, all stators are fitted with an additional temperature sensor
for temperature measurement. This sensor (in the following: sensor
temperature measurement has a nearly linear characteristic curve (see
Fig. 9-9).
Type PTC SNM.150.DK.***
Rated response temperature ϑ
NAT
150 °C
Resistor at 25°C
≈ 100-250 Ohm
Fig. 9-6: Temperature sensor motor protection
Temp. sensors Motor protection
Connection wires 5 and 6
Nominal temperature 150°C
100
1000
10000
100000
0 102030405060708090100110120130140150160170
Temperature Motor winding in °C
Resistor temperature sensor in Ohm
TEMPERATURSENSOREN MBT.XLS
Fig. 9-7: Characteristic of motor protection temperature sensors (PTC)
Type KTY84-130
Resistor at 25°C 577 Ohm
Resistor at 100°C 1000 Ohm
Continuous current at 100°C2 mA
Fig. 9-8: External sensor temperature measurement
Sensor temperat. measuring KTY84-130
Connection wires 7 (+) and 8 (-)
500
600
700
800
900
1000
1100
1200
1300
1400
1500
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170
Temperature Motor winding in °C
Resistor temperature sensor in Ohm
Fig. 9-9: Characteristic of temperature measurement sensor KTY84-130
(PTC)
A polynomial of degree 3 is sufficient for describing the resistance
characteristic of the sensor used for temperature measurement (KTY84-
130). In the following, this is specified for determining a temperature from
a given resistance and vice-versa.
Temperature sensor motor
protection
External sensor temperature
measurement