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Rexroth IndraDyn A
Temperature depending on
resistance
Resistance depending on
temperature
DOK-MOTOR*-MAD/MAF****-PR03-EN-P
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.
=
⋅
T
A
w
T
:
Winding temperature of the motor in °C
w
R
:
Resistance of the temperature sensor in Ohms
KTY
-8
A:
3.039 ·10
-4
B:
-1.44 ·10
C:
0.358
D:
-143.78
Fig. 9-19:
Polynomial used for determining the temperature with a known
sensor resistance (KTY84)
=
R
KTY
T
:
Winding temperature of the motor in °C
w
R
:
Resistance of the temperature sensor in Ohms
KTY
-6
A:
1.065 ·10
B:
0.011
C:
3.93
D:
492.78
Fig. 9-20:
Polynomial used for determining the sensor resistance (KTY84) with
a known temperature
Note:
Note the correct polarity when using the sensor for
temperature measurement.
You can find further details on connecting the temperature sensors in
chapter 8, "Connection Techniques".
3
+
⋅
2
+
⋅
R
B
R
C
KTY
KTY
⋅
3
+
⋅
2
+
⋅
A
T
B
T
C
w
w
9-15
Application Notes
+
R
D
KTY
+
T
D
w
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