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Application notes
9.7.8
Operation without liquid cooling
9.7.9
Rotor temperature
Bosch Rexroth AG R911298798_Edition 08
Fig. 9-15:
Combination of series and parallel connection
Theoretically, an operation of MBT motors without any liquid coolant is possi‐
ble. Without liquid cooling, however, the performance data available is re‐
duced considerably.
●
For operation without liquid cooling, only motors of frame size 130 "cool‐
ing type N" (natural convection) and frame size 530C "cooling type S"
(surface cooling) are approved.
Operation without liquid coolant is only allowed with an applica‐
tion test and explicit approval by Bosch Rexroth. Without verifica‐
tion and approval, this operating mode is not intended and ex‐
cludes any warranty.
If required, please contact the responsible Bosch Rexroth regional office.
Please refer to the appendix for the addresses.
The max. permissible rotor temperature during motor operation is +100 °C. If
this temperature limit can be exceeded, e.g. if heat enters the motor via parts
attached on the rotor, the user has to provide additional cooling of these
parts.
MBT High Synchronous Torque Motors
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