REXROTH IndraDyn A Series, Project Planning Manual

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Rexroth IndraDyn A Application Notes
9-11
Inlet Temperature of Coolant
IndraDyn A motors have been designed acc. to DIN EN 60034-1 for
operation with coolant temperature of +10...+40°C. This temperature
range must be observed at all times. With higher coolant temperatures,
the reduction of the available torque is increased. Because of high
temperature gradients, lower coolant temperatures can lead to destruction
of the motor.
Note:
Install systems in the cooling circuit to monitor flow, pressure,
and temperature.
Setting the inlet temperature of the coolant must be carried out observing
the specified temperature range and taking into account the existing
ambient temperature.
The lower threshold of the recommended coolant inlet temperature may
be limited depending on the existing ambient temperature. To avoid
condensation, the lowest allowable coolant temperature may be max. 5°C
below the existing ambient temperature.
Example 1:
Permissible range of coolant inlet temperature: +10... +40°C
Ambient tempe20°C
Coolant inlet temperature to be set: +15... +40°C
Example 2:
Permissible range of coolant inlet temperature: +10... +40°C
Ambient tempe30°C
Coolant inlet temperature to be set: +25... +40°C
Setting the Inlet Temperature