Coolant - Siemens SIMOTICS T-1FW6 Operating Instructions Manual

Description
3.4 Design
The rated motor data refer to operation at a coolant inlet temperature of 35 °C. If the
intake temperature is different, then the continuous motor current changes as shown in the
following diagram.
Note
For a cooler intake temperature of < 35 °C, the possible continuous motor current is greater I
I is the current (rms value) of the stator at torque M
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Larger cable cross-sections may be required. This means that you must take into account the
rated current of the cables.
The following diagram shows the principle dependency of the relevant continuous motor
current on the intake temperature of the cooling water in the main cooler. The rotor losses
are omitted as negligible.
Figure 3-5
3.4.3.2

Coolant

Providing the coolant
The customer must provide the coolant. The motors are designed for water cooling. The water
must comply with the requirements corresponding to the corrosion protection agent.
Note
Power derating when using oil as coolant
If you are using oil as coolant, then this can reduce the power loss dissipated by the cooler.
Appropriately reduce the motor power. Contact your local sales partner if you have any
questions.
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Influence of the coolant inlet temperature
and speed n = 1 r/min.
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1FW6 external rotor built-in torque motors
Operating Instructions, 03/2023, A5E49196960B AC
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