Radiation - Inputs

Radiation - Inputs

This panel allows describing the parameters defining the radiation phenomenon existing in the machine.

Mainly, two radiation phenomena exist in the machine:

  • From the end windings, rotor and stator ends to the frame and the end caps.

  • Between the rotor and the stator, in the airgap.
Internal cooling - Radiation design area
1 Display the axial and radial view of the machine.
2 Display the internal cooling datasheet, showing the thermal parameters defining the internal heat exchanges.
3 Radial view of the motor, where specific exchange areas can be highlighted depending of the selected input.
4 Axial view of the motor, where specific exchange areas can be highlighted depending of the selected input.
5 The section “Radiation” is selected.
6 Button to set the internal emissivity automatically by internal process
7 Selected button, to set the internal emissivities manually
8

Input related to the radiation corresponding to the selected radiation mode. In user mode, the following emissivities must be set:

  • The frame inner surface emissivity, with a default value of 0.8
  • The rotor and stator emissivity, with a default value of 0.3.

These emissivities are used for the radiation occurring in the airgap, and from the rotor end and stator end to each end space.

  • The end winding emissivity, with a default value of 0.4.

This emissivity is applied to non-potted end-windings only. The assumption is made that the potted end-windings do not radiate any power.

  • The end ring emissivity, with a default value of 0.4.
9 Button to restore default input values.
10 Button to apply inputs. Pressing the enter key twice applies inputs too.
11 Icon to export internal cooling data into *.txt or *.xls files.