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In the paper "The study on electromagnetic compatibility of DC electric motor in HAPS" there is a description for a DC motor model structure : enter image description here

enter image description here

My problem is with imaging this model as I can't understand, and therefore, imagine this model, specifically the louvers part as it is not illustrated in the figure. Someone, please provide some pictures to illustrate this model. Thanks in advance.

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The louvers are for cooling. And what's drawn isn't what I'd call "louvers" -- I think of louvers as slots, not little bitty holes.

enter image description here

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  • \$\begingroup\$ Thank you very much , Can you please explain this statemnt "3 louvers × 8 group, interval dl of every louver in a group, 45◦ interval of the group along the circumferential" I really appreciate your help ! \$\endgroup\$
    – John adams
    Commented May 2, 2019 at 17:34
  • \$\begingroup\$ Ok I understood the statement. One more question please, what about the horizontal lines drawn in the inner cylinders ?? Are they louvers ? as he said that there exist louvers in the gap between the shell and the axis? \$\endgroup\$
    – John adams
    Commented May 2, 2019 at 18:05
  • \$\begingroup\$ I don't think they're saying there are louvers between the shell and the shaft. Rather, I think that they are modeling the assembly as having a gap between the shell and shaft. Remember, this model is meant to vastly simplify a motor into something that they can use for modeling it's RF behavior. \$\endgroup\$
    – TimWescott
    Commented May 2, 2019 at 19:23
  • \$\begingroup\$ Those horizontal lines denote that the 3D model has been sliced across the middle. They essentially mean "this area is filled with stuff". \$\endgroup\$
    – TimWescott
    Commented May 2, 2019 at 19:24

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