Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Why did I think of that?

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.

user:
pass:
register,


                   

Geomagnetic Motor

might as well define it.
 
(0)
  [vote for,
against]

An electric motor that uses the Earth's magnetic field as field magnets.

When externally powered, the brushes would have to be lined up with the Earth's magnetic field in order to operate with any semblance of efficiency.

The application of a spintop such as <link> would probably be the most interesting due to its one-piece design: it uses a self-contained solar cell for power, and a crude gaussmeter to sense when to energize its armatures. Note that it must be started manually in order to energize the gaussmeter.

(still working on a descriptive name: there's an existing "Geomagnetic Motor" on the web which looks a bit scammy... haven't checked it out in any detail yet: broken English gives me a headache)

FlyingToaster, Jan 10 2011

One of the few applications Solar_20Powered_20G...Motion_22_20Spintop
[FlyingToaster, Jan 10 2011, last modified Jan 11 2011]

Very fast spinning rotor very_20fast_20spinning_20rotor
See main idea and look down for my comment about using Earth's magnetic fiield [Ling, Jan 11 2011]


Please log in.
If you're not logged in, you can see what this page looks like, but you will not be able to add anything.



Annotation:







       // brushes //   

       I'm pretty sure you'd want this to be brushless.
RayfordSteele, Jan 10 2011
  

       Brushless DC uses permanent magnets as rotors, and coils on the outside, ie: it's an "inside out" brush model. The top <linked> uses a solar cell which is on the rotor so there's no brush.
FlyingToaster, Jan 11 2011
  

       Using solar cells gives some kind of directional information (at least "up and down").   

       See link
Ling, Jan 11 2011
  

       Obviously great minds do think alike :)   

       Have you given any more thought to that ?
FlyingToaster, Jan 11 2011
  

       This is not just a compass, then?
Ian Tindale, Jan 11 2011
  

       A coil-magnetometer is a compass of sorts. This is a coil-magnetometer operating in reverse.   

       You'd want(/need) to line up the brushes with the Earth's magnetic field so you switch polarity on the armatures at the right time.
FlyingToaster, Jan 11 2011
  

       FT, //Have you given any more thought to that ?//   

       After I blasted the workshop with shrapnel? I must admit, each time I pick some out of my body, the thought crosses my mind.
Ling, Jan 12 2011
  


 

back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle