11.6.5.2 Pt1000 temperature sensor
STOBER synchronous servo motors are available in versions with a Pt1000 temperature sensor. The Pt1000
is a temperature-dependent resistor that has a resistance curve with a linear relationship with temperature.
As a result, the Pt1000 allows for measurements of the winding temperature. These measurements are lim-
ited to one phase of the motor winding, however. In order to adequately protect the motor from exceeding
the maximum permitted winding temperature, use a i²t model in the drive controller to monitor the winding
temperature.
Pt1000 temperature sensors can also be used with the One Cable Solution.
Avoid exceeding the specified measurement current so that the measured values are not falsified due to
self-heating of the temperature sensor.
Feature Description
Measurement current (constant) 2 mA
Resistance R for ϑ = 0 °C 1000 Ω
Resistance R for ϑ = 80 °C 1300 Ω
Resistance R for ϑ = 150 °C 1570 Ω
Fig.3: Pt1000 temperature sensor characteristic curve
11.6.6 Cooling
A synchronous servo motor in the standard version is cooled by convection cooling (IC 410 in accordance
with EN 60034-6). Optionally, forced ventilation can be used to cool the motor.
11.6.6.1 Forced ventilation
STOBER synchronous servo motors offer the option of being cooled with forced ventilation in order to in-
crease performance data while maintaining the same size. Retrofitting with a forced ventilation unit is also
possible in order to optimize the drive at a later date. When retrofitting, check whether the conductor cross-
section of the power cable of the motor must be increased. Also take into account the dimensions of the
forced ventilation unit.
The performance data for motors with forced ventilation can be found in the chapter Selection tables and
the dimensions in the chapter Dimensional drawings.
11.6 Product description 11 EZsynchronous servo motors
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