Hi,
does anyone built a halbach array? How does it works? My doubt is at the sides there are flux or they are blocked too? To help you know what i`m talking about see the image attached. In the red arrows we have magentic flux? is increased or blocked?
(https://overunityarchives.com/proxy.php?request=http%3A%2F%2Fmembers.lycos.co.uk%2Faugustoa%2Fhalbachflux.jpg&hash=d6e3b31fabcbabb8b860efda211dbf8c48132534)
thanks
Augusto Arnold
aarnold, There is some flux but it will be very weak. Halbach arrays don't "block" flux, they just concentrate it in certain areas.
Quote from: aarnold on January 03, 2008, 08:05:36 PM
Hi,
does anyone built a halbach array? How does it works? My doubt is at the sides there are flux or they are blocked too? To help you know what i`m talking about see the image attached. In the red arrows we have magentic flux? is increased or blocked?
thanks
Augusto Arnold
Quote from: aarnold on January 03, 2008, 08:05:36 PM
Hi,
does anyone built a halbach array? How does it works? My doubt is at the sides there are flux or they are blocked too? To help you know what i`m talking about see the image attached. In the red arrows we have magentic flux? is increased or blocked?
Augusto Arnold
Aarnold
I did some playing with halbach arrays a few years ago ...
As far as I can see they just concentrate the magnetic flux ......... it is interesting most of the flux is on one side .
They are pretty easy to build
All you need are some square magnets. some super glue . and some alumimum tape to make it a little more durable.
Simply glue the magnets together each one rotated 90 degrees more than the last
Another thing that seems interesting is that if you make a bunch of halbach arrays lay them side by side but rotate each one 90 degrees you get a large halbach array . on its face it has same poles on both sides and 2 rows of " pockets " of the opposite pole
Hi Rotorhead and One,
thanks for your replies. Certainly I'll do some tests .. Do you know how stronger the magnetized side increases ? I'll buy some neos cubes to play with... then I'll post some pictures in the forum just to registrate it.
thanks again
Augusto Arnold
Quote from: aarnold on January 07, 2008, 01:24:03 PM
Hi Rotorhead and One,
thanks for your replies. Certainly I'll do some tests .. Do you know how stronger the magnetized side increases ? I'll buy some neos cubes to play with... then I'll post some pictures in the forum just to registrate it.
thanks again
Augusto Arnold
Aarnold I don't know what % of the magnetic flux is focused on one side .. ... I would guess that it is somewhere around 80% ........ I was impressed when I first saw it .
If you want to try a rather big project with halbach arrays try making a stator from a ring of halbach arrays then for the rotor make an electromagnet version of the halbach array ......I am pretty sure that if you reverse polarity on the 2nd and 4th magnets the array will " flip "
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I don't mean to get picky here ...........but my login name here needs to have a small o .... one with a capital O is another person
gary