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Shaded Pole Motors

  1. Apr 6, 2015 #1

    dlgoff

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  2. jcsd
  3. Apr 7, 2015 #2

    davenn

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    hey Don

    They are something I have never heard of before ... had to google them to find out more :wink:


    Dave
     
  4. Apr 7, 2015 #3

    jim hardy

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    I knew about shaded pole motors for small fans and record players,
    A shorted turn around part of the core gives an out of phase flux which when added to main flux makes a rotating flux.
    Another piece of sinewave magic. Euler was sure one heavy dude.

    but i never saw a reversible one like described in that patent.
     
  5. Apr 7, 2015 #4

    dlgoff

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    Thanks for this piece of information. Motors certainly aren't my forte. I'll need to look into record players.
     
  6. Apr 7, 2015 #5

    jim hardy

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    They're easy to spot by the heavy copper shorted turn.

    upload_2015-4-7_13-49-58.png

    Prevalent in blower fans and small appliances.
    Current in the shorted turn lags, making an out of phase flux.


    imageevf.jpg





    Shaded_pole_detail.jpg
     
  7. Apr 7, 2015 #6

    davenn

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    That's a mouthful .... too much flux in there :wink:

    That's outstanding, Jim !!

    Have seen those copper links so often over the years and never knew their purpose

    As with Don's comment .... motors are also not my forte


    dave
     
  8. Apr 12, 2015 #7

    dlgoff

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    Yes...they...are. Thanks for educating me. I pulled this out of one of my piles. It WILL become beautiful. :oldtongue:
    tobebeautiful.jpg


    From your link (bold by me)
    Which explains the damper motors gear train.

    lowtorque.jpg
     
  9. Apr 12, 2015 #8

    jim hardy

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    That'd look cool with an old wood model airplane propeller . Engineer's fan....
     
  10. Apr 12, 2015 #9

    dlgoff

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    Good call. :bow: Any design experience as to getting "good" airflow? You know, working well is one of my design task. :oldbiggrin:
     
  11. Apr 12, 2015 #10

    jim hardy

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  12. Apr 13, 2015 #11

    dlgoff

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    Perfect. 1428967914_thumb_up.png
     
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