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what type of motors will have curved or cupped neos
By mgormley, Section Homebrewed Electricity Posted on Fri Sep 19th, 2003 at 08:18:56 AM MST
what type of motors will have curved or cupped neos

what type of motors would have curved or cupped neos, that i can pull apart?
i will be using long bar magnets if i cant get the curved or cupped neos, for my ind conversion

what type of motors will have curved or cupped neos | 6 comments (6 topical, 0 editorial)

long bars (1.00 / 1) (#1)
by troy on Fri Sep 19th, 2003 at 09:43:00 AM MST
(User Info)

As noted by others (Rodger maybe...) the long bar magnet idea will probably work fine if the entire top face of the magnet is a single pole (N or S) and probably won't work at all if one end of the bar is N and the other end S.

Clamping/gluing magnets cheek to cheek like that can be something of a trick. You may need to glue them one at a time until the glue completely sets up for each one.

Best regards and have fun!

troy

Re: long bars (none / 0) (#5)
by Jerry on Fri Sep 19th, 2003 at 10:44:12 PM MST
(User Info) http://www.dplusv.com/Photo-03.html

Hi Richard This is the 6th time I've tryed to respond to your ? This thing won't let me respond to your ? It says I've used more than 50 words. This is 36 Jerry

Airheads Page

[ Parent ]

Re: long bars (none / 0) (#6)
by Jerry on Fri Sep 19th, 2003 at 10:59:37 PM MST
(User Info) http://www.dplusv.com/Photo-03.html

OK well lets try it again? HI Richard. I've had a thought about this curved magnet problem. There are curved ceramic magnets galor in pm motors. Many have 2 but you need 4. And ceramics are weak. This might be a little better than ceramics? Take a thick wall steel tube the same diamter as your motors armature. Since your motor is 4 pole. Cut this tube into 4 pices like a pie. cut it so there is a gap between the pices. Glue the magnets to the under side of the tubing pices then glue the magnets to the greatly redused in size armature. This would get the flux closer to the laminations and cover the pole more thouroughly. There will be a reduction in flux travel. But the 2 surfaces will be better mated together and hopefully overcome some of the square surface losses. JK TAS Jerry

Airheads Page

[ Parent ]

Re: what type motors have curved or cupped neos (none / 0) (#2)
by jubalearly on Fri Sep 19th, 2003 at 09:44:37 AM MST
(User Info)

Only permanent magnet motors, AFAIK. Disk drives are the main source. Since you want them all to match, I would just buy them @ wondermagnet.com

I wouldn't take the magnets from a PM motor that was working, since it would already be a generator. I'd find some way to use it as is, or maybe rewind it for a different voltage if it was big enough to make it worthwhile.

What kind of bar magnets would be strong enough for this application? How would you install them in the rotor?

Re: what motors will have curved or cupped neos (none / 0) (#3)
by jubalearly on Fri Sep 19th, 2003 at 09:49:48 AM MST
(User Info)

The word Re: added by the program makes this subject too long again. You will need to shorten it like troy (or I) did.

Re: what motors will have curved or cupped neos (none / 0) (#4)
by jubalearly on Fri Sep 19th, 2003 at 10:07:06 AM MST
(User Info)

I left this out of my previous post: One source for PM motors is newer automobiles. You would have to check and see which of the 12vdc motors are permanent magnet. A lot of them are, but only the bigger ones (more powerful) are interesting as possible wind generators. Wind shield wiper motors and power windows come to mind.

[ Parent ]

what type of motors will have curved or cupped neos | 6 comments (6 topical, 0 editorial)

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