Motor components of the
,QIOXHQFHRIFRRODQWLQOHWWHPSHUDWXUH
,1RILQFXUUHQWPRWRU&RQWLQXRXV |
,QOHWWHPSHUDWXUHRIWKHPDLQFRROHULQr& |
Figure 3-3 Principal dependency of the continuous motor current on the intake temperature of water cooling in the main cooler when the rotor losses are disregarded
Heat-exchanger unit
A
The cooling power is calculated from the sum of the power losses of the connected motors. The pump power must be adjusted in accordance with the specified flow and pressure loss of the cooling circuit.
For a list of companies and addresses from whom you can obtain
Dimensioning the heat-exchanger unit
The power loss generated in the motor during continuous operation causes a heat flow, most of which is dissipated via the coolant in the cooling system. A smaller proportion of it is dissipated via the surrounding machine construction. The cooling power of the heat- exchanger unit in the cooling system must be designed in such a way that it can dissipate at least 85 - 90% of the generated power loss. If several motors are operated simultaneously on one cooling system, this value applies to the combined total power loss.
During continuous operation, the motor can only be loaded to the extent that the effective continuous torque Meff does not exceed the rated torque MN. As a result, therefore, the effective power loss cannot exceed the rated power loss PV,N.
0
⎜ HII ⎟
If the actual effective loss is impossible to predict or too complex to calculate, the total combined continuous power loss (table values) of all the motors deployed can be used instead to calculate the required cooling power.
1FW6
52 | Configuration Manual, 05/2009, |
