Coolant - Siemens SIMOTICS T-1FW6 Configuration Manual

Mechanical properties
4.1 Cooling
The cooling power is calculated from the sum of the power losses of the connected motors.
Adapt the pump power to the specified flow and pressure loss of the cooling circuit.
For a list of companies from whom you can obtain heat exchanger units, see the appendix.
Dimensioning the heat-exchanger unit
The power loss generated in the motor during continuous operation causes a thermal flow to
take place. The surrounding machine assembly dissipates a small percentage of this thermal
flow. The cooling system coolant dissipates the majority of this thermal flow. The cooling system
must dissipate 85 % to 90 % of the power loss that occurs. Appropriately dimension the cooling
system rating.
If you operate several motors simultaneously on one cooling system, then the cooling system
must be able to dissipate the sum of the individual power losses.
In continuous operation, only load the motor so that the continuous rms torque of the duty
cycle M
for the operating point in the M‑n diagram to be above the characteristic for S1 duty. As a
consequence, the maximum rms power loss P
If you cannot determine the actual rms power loss P
power losses P
listed in the data sheets. Dimension the cooling system based on the sum of the rated power
losses determined P
If the sum of the rated power losses P
will lead to an overdimensioning of the cooling system.
The cooling system must be sufficiently powerful to ensure the required coolant pressure
even at the maximum volume flow rate.
4.1.2

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.
62
does not exceed the rated torque M
eff
M
eff
 
of all the motors to be used. The rated power losses P
V,N
.
V,N
. In continuous operation, it is not permissible
N
only reaches the rated power loss P
V
then alternatively you can add the rated
V
is greater than the actual rms power loss P
V,N
Configuration Manual, 09/2022, A5E52220645B AA
.
V,N
of the motors are
V,N
, then this
V
1FW6 Built-in torque motors