the Otherpower.com Discussion Board || Comments need help

Front Page - [Homebrewed Electricity-- (wind) (solar) (hydro) (steam) (controls) (storage) (mechanical)] - Classifieds - Site News
Everything - Newbies - [Remote Living-- (housing) (heat) (light) (water)] - Rants & Opinion - Diaries - Our Products

need help | 34 comments (34 topical, editorial)

Re: need help (3.00 / 0) (#23)
by electrondady1 on Wed Aug 13th, 2008 at 08:58:54 AM MST
(User Info)

your video runs on my computer using quick time

it's impossible to tell what your magnet spacing is.
the space between your magnets should be about the same as the width of your mags.

what is the dia. of the wheel you have the mags mounted to .
can you detect any magnetic flux on the back side of the rim using a steel paper clip?
if so you will need to add more steel in there .

i would recommend you google search the board for "electric ed"
look for diagrams showing the relationship between coils and mags.
the center hole of your coils should be the same shape and size as your magnet.
the width of the legs of your coils should be such that when the outside of one leg is over a magnet , the inside of the other leg of the coil is over the adjacent magnet.

don't put any sort of iron filler inside the coils.

[ Parent ]

Re: need help (3.00 / 0) (#24)
by raine (draine@dyocore.com) on Wed Aug 13th, 2008 at 09:25:46 AM MST
(User Info)

all this is very helpful!

yes i was getting magnetic attraction from the back side of the rim, I will have to add more steel.
The magnets are the size of the center hole of the coil and I will NOT fill the center for now to prevent clogging.
Yes i was testing DC voltage. I will go down and pick up a strobe today.
I have noticed some alignment problems and i will re-set the coils today and be more precise in re-assembly.
Once i have a new build I will do another video to post and try a different format.
I will check out information about "electric ed"

Thank you everyone!
- d
[ Parent ]

Re: need help (3.00 / 0) (#27)
by Flux on Wed Aug 13th, 2008 at 11:40:14 AM MST
(User Info)

You can't measure the ac output of the coils with a dc meter. That is why it is going negative. You will need to use the ac range or connect your coils to a 3 phase bridge.

Flux

[ Parent ]

Re: need help (3.00 / 0) (#26)
by tecker on Wed Aug 13th, 2008 at 10:09:56 AM MST
(User Info)

I looked at the video and there's a place right after he pans away from the meter towards the end . The gaps looks very large more than 1/2 " . Use filings, black sand etc. on paper to see how much flux goes forward and how much turns . These lines can be compared to rubber bands they have to stretch and deform the shape of the wave guide around the copper going from a even round to a compressed ellipse before returning and passing current. If nothing holds the bands from the other side proximity to the copper the copper is not effected . Also the large hole makes a divot in the peak waveform :As the coil conducts slightly and back emf returns the peak before center conduction. . Add a steel ring for magnet backing that will also close the gap more mags more coils and turn the coils . The resistance is very high now so some creative connection are definitely in order to get good power. . The reluctance idea is cool but you can see how little the flux is to the steel ring to be able to affect the wheel.
Here's videolan to run the mp4
http://www.videolan.org/

[ Parent ]

Re: need help (3.00 / 0) (#28)
by dnix71 (yahoo.com 'dnix71') on Wed Aug 13th, 2008 at 05:04:16 PM MST
(User Info)

VLC will play the flv I made, too. Download it to play offline. It's 1/10 the size for people still on dialup.

[ Parent ]

Re: need help (3.00 / 0) (#29)
by dnix71 (yahoo.com 'dnix71') on Wed Aug 13th, 2008 at 05:14:02 PM MST
(User Info)

Here is a screen cap selection showing the air gap. The magnets are round and become invisible when the hub turns.

[ Parent ]

here's the new slator (3.00 / 0) (#32)
by raine (draine@dyocore.com) on Tue Sep 2nd, 2008 at 08:42:44 PM MST
(User Info)

27 coils with a 1/2" x 3/4" oval center set in resin. I'm going to test this tomorrow. my question is - do the coils have to be touching? As you can see I have about 1 1/2" space between coils. will this cause a problem?

I used a Star configuration with 21 g wiring - 150 turns.

I'll post a final test tomorrow sometime.

- d
[ Parent ]

need help | 34 comments (34 topical, 0 editorial)

Menu

� create account
� How to use the board
� FAQs
� search the board
� Google search the board
� Old Otherpower Board

Login

Make a new account

Username:

Password:

You must be a registered user to post here. It's easy and free, and the link is on the upper right side of your page.
All trademarks and copyrights on this page are owned by their respective companies. Postings are owned by the poster, but may be deleted or moved at the ADMIN's sole discretion. The Rest � 2003 Forcefield.
You can Email the board ADMIN here. PLEASE include the username you signed up with!