Fieldlines.com || Wind

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

Wind
By kenl, Section Mechanical Posted on Sun Feb 05, 2006 at 05:29:27 PM MST
Tread mill motor

I picked up a tread mill motor yesterday. The rating is 90v dc, 5.4a @4200 rpm. Its a PM motor so I guess my question would be could I get better power out of it if I halved the magnets so I had more poles? The best I can do right now as is with 2 poles is 13v @ 2a using a 1800 rpm drill. kenny

Wind | 3 comments (3 topical)

Re: Wind (3.00 / 0) (#1)
by johnlm on Sun Feb 05, 2006 at 11:03:13 AM MST

Im not exactly sure what you mean by "halved the magnets" but it sounds as if you are thinking of trying to go from 2 poles to 4 poles by doubling the number of magnets (by cutting them in half?). I suspect the layout of the armature and windings are made to correlate to the size of the 2 magnet poles you have now so adding two magnets (of opposite polarity to get 4 poles total) where you have one magnet of of one polarity now would only cancel out the effect on the winding made to cover one larger magnet pole- you would have a N and a S pole covering a winding at the same time. I would think if you tried increasing the poles to 4 instead of two you would have to rewind the armature to get the proper winding size (and teeth of the laminates) to match the new (1/2 the original) magnet width.

John

Re: Wind (3.00 / 0) (#2)
by Flux on Sun Feb 05, 2006 at 11:57:29 AM MST

Yes and move one brush holder 90 deg and wave wind it or add 2 more brushes at right angles if you keep lap winding.

No, sorry you cant do things like that with dc motors. All you could usefully do is rewind it for lower speed with more turns.
Flux

[ Parent ]

Re: Wind (3.00 / 0) (#3)
by kenl on Sun May 07, 2006 at 04:55:33 PM MST

Found a motor like that flux. Its wound 90 degrees and has 4 brushes wired 180 degrees across for each phase. Puts out 24 volts. Found some brushes but can't seem to find any holders for them. Bahhhh!! Oh yeah has four mags also set like I was doing. So I guess I'll see if I'm any good at rewinding the 1st one. John, howed you figure out what I was asking? reread my post and even confused me :)

Wind | 3 comments (3 topical)

Menu

· create account
· How to use the board
· FAQs
· search the board
· Google search the board

Login

Make a new account

Username:

Password:

Total Views

101 Scoop users have viewed this posting.

Related Links

· magnet
· Also by kenl

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 © 2009 Forcefield.
You can Email the board ADMIN here. PLEASE include the username you signed up with!