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radial alt.
By electrondady1, Section Newbies Posted on Sat Mar 10th, 2007 at 03:40:54 PM MST
leg lengh versus frequency

i'm looking at 16 magnets . 1"x1.5"x.5 "
i could lay them out on a 10" rotor and build a single rotor axial alt
and for comparison purposes, using a stationary return path.
i was thinking two phase, with 32 overlapping coils.
as an alternative,
it would be possible to do a single rotor radial alt.
placing the mags on the inside of a 4"pipe
i have in mind a four pole layout with the poles consisting of 4 magnets each.
sticking with the two phase idea, i would require only 8 overlapping coils.
right away i can see an advantage in reduced resistance. as i am eliminating the ends(non productive copper) from 12 coils while retaining the productive copper.
there would be the same amount of magnetic flux crossing the coils.
but the frequency per rpm would be reduced from 16 to 4.
over all i think there might be an increase in current but a reduction in voltage.
any thoughts?

radial alt. | 11 comments (11 topical, 0 editorial)

Re: radial alt. (3.00 / 0) (#1)
by vawtman (vawtman(at)charter(dot)net) on Sat Mar 10th, 2007 at 03:53:04 PM MST
(User Info)

Edaddy if you decide to try a radial design,ive got some 1x1.5x5/16ths arc segment neos.Maybe to sell.Should work well on the 4in diameter.

Re: radial alt. (3.00 / 0) (#2)
by electrondady1 on Sat Mar 10th, 2007 at 06:50:11 PM MST
(User Info)

that's a very generous offer v'man and i may take you up on it when i get a little further along.
this idea has been running around in my head for a while.
it's kind of the opposite of a motor conversion.
the coils would be attached to a central stationary shaft and the mags to a rotating outer casing.

[ Parent ]

Re: radial alt. (3.00 / 0) (#3)
by vawtman (vawtman(at)charter(dot)net) on Sat Mar 10th, 2007 at 07:49:30 PM MST
(User Info)

Ive had the same thoughts, vawts can do weird things.Although impossible to some can be done.
The problem would be the rpms you could drive it at without major gearing.Mounting to keep the airgap constant is all in the back of our minds.Hang in there.

I once thought i could somehow wind an elongated dc motor.

Well its all in fun at least to me.

[ Parent ]

Re: radial alt. (3.00 / 0) (#4)
by TomW on Sat Mar 10th, 2007 at 08:02:20 PM MST
(User Info)

vman;

Zubbly and I discussed using motor conversions wound for low rpm cut in as top and bottom bearings for a vawt. Get low rpm alts and solid bearings in one device. Multitasking at its best.

Just thought I would toss that out.

Cheers.

TomW

"Education consists mainly of what we have unlearned."--Mark Twain
[ Parent ]

Re: radial alt. (3.00 / 0) (#5)
by vawtman (vawtman(at)charter(dot)net) on Sun Mar 11th, 2007 at 02:23:16 PM MST
(User Info)

Tom you mean to tell me you guys didnt finish that yet.Kidding

I remember trying to figure a method to attach the tower.

[ Parent ]

Re: radial alt. (3.00 / 0) (#6)
by TomW on Sun Mar 11th, 2007 at 03:32:36 PM MST
(User Info)

vman;

Nope never even started it. We toss around ideas and see what sticks to the wall. Still looking for a good project to use some of zubbly's flux spray.

The tower could just be upper, lower conversion with the wing in between on a couple H's on its side type frame guyed well from top

My building days are probably past. No energy to spare for much beyond getting by after the heart attacks a couple years back.

Anyway I still can think up bizarre ideas just not much on the implementation these days.

Cheers.

TomW

"Education consists mainly of what we have unlearned."--Mark Twain
[ Parent ]

Re: radial alt. (3.00 / 0) (#7)
by vawtman (vawtman(at)charter(dot)net) on Sun Mar 11th, 2007 at 04:48:39 PM MST
(User Info)

Tom, Could maybe be done.

Bizarre ideas are good for the heart.Maybe flux spray also:>)

Take care and remember i was just kidding.

Edaddy any thoughts of trying something like this? Hmmm
.

[ Parent ]

Re: radial alt. (3.00 / 0) (#8)
by electrondady1 on Mon Mar 12th, 2007 at 06:30:16 AM MST
(User Info)

tom,can i post a .tif file?
i made a little drawing of what i had in mind and scaned it . but for some reason its formed into some thing called a tif instead of a jpeg what ever, it seems huge

[ Parent ]

Re: radial alt. (3.00 / 0) (#9)
by TomW on Mon Mar 12th, 2007 at 07:24:05 AM MST
(User Info)

electrondaddy;

I wouldn't post it direct into your comment but upload it to your files and I will post a direct link to it if you don't know how.

.tif are pretty big. Is it the one called "Scan0001_Small.tif" ??

If so the direct link to it is:

http://www.otherpower.com/images/scimages/2793/Scan0001_Small.tif

Cheers.

TomW

"Education consists mainly of what we have unlearned."--Mark Twain
[ Parent ]

Re: radial alt. (3.00 / 0) (#10)
by wdyasq on Mon Mar 12th, 2007 at 06:47:10 PM MST
(User Info)

electrondady1,

If you want to save and use this you are welcome to. I took it from ~1.6MB to 53kb. It took more time to transfer files than to make it smaller.

I will remove this file from my upload space in the near future - when I am cleaning out old stuffs.

Ron
Adventure is just bad planning." -- Roald Amundsen
[ Parent ]

Re: radial alt. (3.00 / 0) (#11)
by electrondady1 on Wed Mar 14th, 2007 at 06:24:21 AM MST
(User Info)

thanks very much for making it smaller and changing it to a jpeg.
i suppose i will need to learn how to do this if i want to post a drawing.
i have been a bit distracted this week
the timing chain went on the mighty astro van, so i have been up to my elbows in v6 motor.

experimenting with vawts led me in the direction of large diameter rotors
with lots of poles/coils.
if i give in and use a belt drive i can make the alt turn at any speed i want .
so the mags are placed on the inside of the rotor , they will stay inplace no matter how fast i spin them.

[ Parent ]

radial alt. | 11 comments (11 topical, 0 editorial)

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