Technical data

9-6 Application Notes Rexroth IndraDyn T
DOK-MOTOR*-MBT********-PR03-EN-P
Note: The coolant inlet temperature must be set in a temperature
range of +10°C - +40°C and may be only max. 5°C under the
existing ambient temperature to avoid condensation.
Operation without Liquid Coolant
Theoretically, operation of IndraDyn T motors without any liquid coolant is
possible.
Therefore, please heed the following notes and restrictions:
• Only the motors of size 130 "Cooling type N" (natural convection) and
size 530C “Cooling type S“ (surface ventilation) have been released for
operation without liquid cooling.
• Without liquid cooling, only significantly reduced performance data are
available. Except for MST130, these are not listed in this
documentation.
• Operation without liquid coolant is permissible only with an
application test and explicit permission by Bosch Rexroth. This
mode of operation is not proper without such a test and
permission; it violates any kind of guarantee.
If required, please contact the responsible Bosch Rexroth branch. You
can find the addresses in the Appendix.
Rotor Temperature
The maximum permitted rotor temperature when operating the motor is
+100°C. If this temperature must be exceeded, e.g. if parts attached to
the rotor lead to heating of the motor, the user must provide additional
cooling of these parts.
9.6 Motor Temperature Overview
CAUTION
Failure in the machine or damage by improper
use of the sensors!
⇒ The PTC sensors are not safety devices and are not
suited for integration in safety systems to protect
persons or machines.
⇒ The PTC sensors are neither designed nor suitable
for acquisition of the housing, rotor or bearing
temperature. Additional requirements of the
temperature monitor must be implemented by the
machine manufacturer.
⇒ The motor is protected from a thermal load only if
temperature sensor SNM.150.DK is connected to the
drive control device.
Stators of synchronous-torque motors type IndraDyn T are standardized
with integrated temperature sensors to protect the motor. Every motor
phase contains one of three serially switched ceramic PTCs, so that
thermal control of the motor in every operation phase is ensured. These
thermistors (in the following: thermistor motor protection) have a switching
character (see Fig. 9-7) and are evaluated on all Rexroth control devices.