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Forum Index : Windmills : Selenoid alternator

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gj4533

Newbie

Joined: 28/12/2008
Location: United States
Posts: 19
Posted: 02:00am 02 Jan 2009
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Would this be something woth looking into ?

The magnets are already inside the coils and you could add as many coils as you can fit. I know I could make the mechanics work but would the coils be more efficient than the normal sweeping across magnet faces?
Gary
G.Johnston
 
oztules

Guru

Joined: 26/07/2007
Location: Australia
Posts: 1686
Posted: 04:43am 02 Jan 2009
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in a word ...no.

Village idiot...or... just another hack out of his depth
 
AllanS
Regular Member

Joined: 05/06/2006
Location:
Posts: 67
Posted: 08:21am 02 Jan 2009
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  oztules said   in a word ...no.


Kill joy!

I reckon friction between the zig-zag guide (sinusoidal would be better) and the many rollers would gobble up too much power.

 
KiwiJohn
Guru

Joined: 01/12/2005
Location: New Zealand
Posts: 691
Posted: 08:35am 02 Jan 2009
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Gary although the mechanical arrangement is rather novel I am afraid it is a poor design for a generator.

Design of a permanent magnet generator is all about arranging a magnetic field so that the lines of flux are cut by the conductors of the moving coil. So (I think) you want the lines of flux to cross the conductors as near as possible to right angles and for the flux to be as near as possible passing through a magnetic permeable material such as soft iron and passing through air as little as possible.
 
Tinker

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Joined: 07/11/2007
Location: Australia
Posts: 1904
Posted: 12:10pm 02 Jan 2009
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  KiwiJohn said   Gary although the mechanical arrangement is rather novel I am afraid it is a poor design for a generator.

Design of a permanent magnet generator is all about arranging a magnetic field so that the lines of flux are cut by the conductors of the moving coil. So (I think) you want the lines of flux to cross the conductors as near as possible to right angles and for the flux to be as near as possible passing through a magnetic permeable material such as soft iron and passing through air as little as possible.


Whether there are moving coils or moving magnets (or both moving in OPPOSITE direction), does not matter.
As long as there is a right angle movement between the coil end (NOT the sides or the inside!)and the flux , the faster the better.
If I remember correctly, air conducts magnetic flux about 10,000 times worse than soft iron so keep the air gap to the absolute practical minimum.
Tinker
Klaus
 
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