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criteria for inducing voltage
By electrondady1, Section Homebrewed Electricity Posted on Sun Dec 26, 2004 at 05:04:35 PM MST
merry christmass everyone

ive been google searching the board alot lately. i'm trying to understand some of the criteria that govern induction.am i right in thinking, the more poles the better , the heavyer gauge copper the better, voltage is only induce in conductors at 90 degres to the angle of rotation. here is my question at what point is the electron flow actualy induced.?? that is to say , at the point were the mag. fields intersect . or is it when the coils are over both fields. my understanding is that no voltage is induced while the coil is over one mag. field.

criteria for inducing voltage | 13 comments (13 topical)

Re: criteria for inducing voltage (3.00 / 0) (#1)
by Electric Ed on Sun Dec 26, 2004 at 10:30:41 AM MST

These sketches may help with the basics.

The induced voltage is directly proportional to the number of magnetic flux lines cut per unit of time. 100,000,000 lines cut per second = 1 volt.

Factors affecting this are -

Strength of the magnetic flux.
Total length of conductor acted on by the flux.
Speed of relative motion between flux and conductor.
Angle of cutting of flux.

Re: criteria for inducing voltage (3.00 / 0) (#2)
by Jessum Dumguy on Sun Dec 26, 2004 at 12:16:46 PM MST

Okay, Another way of asking the last part of his question.
(>or is it when the coils are over both fields.
>my understanding is that no voltage is induced
>while the coil is over one mag. field.)

I think his question is,
Does the coil produce V's and A's if only one leg of
the coil passes through the single pole (N or S) of a
single magnets lines of flux?
My understanding is that YES, It does.
It would essencially be DC but a current is induced.
The alternating poles of multiple magnets act
oppositely on the twin right angle legs of the coil passing over
opposite poles at the same time, But being a LOOP of wire it
in effect doubles the effect of the PASS through the
opposite lines of flux. ( one pole (N) causing the flow to be say
INward and the (S) to be OUTward. But being a LOOP it's really
the same dirrection in the wire).

Boy I hope thats not leaving anyone more
confussed than I am trying to articulate what I mean.
But I beleive I'm correct in this and I beleive it's
what he was sorta kinda asking. BTW Happy Hollidays all.

.

Chaos reigns within. Reflect, repent or reboot. Order shall return.
[ Parent ]

Re: criteria for inducing voltage (3.00 / 0) (#3)
by Electric Ed on Sun Dec 26, 2004 at 12:57:17 PM MST

Hi Jess,

Everything you said is true, except - "It would essencially be DC".

It would still be AC, but a lower voltage.

Re: criteria for inducing voltage (3.00 / 0) (#4)
by jacquesm on Sun Dec 26, 2004 at 01:23:14 PM MST

to clarify that a bit, it's the change in magnetic field that matters, in combination with the pole of the magnet. Those two multiply to determine the 'quadrant' that you're working in. The other 'leg' with the other pole above it is wound the other way around, and has a magnet of opposite polarity above it.

You could easily make an alternator with only 'N' side up (just leave out the south facing ones) and you'd find you have perfect AC. You could even remove half the 'legs', or all of them but one, it would still be AC.

tricky stuff !

Kudos to Ed, those are awesome drawings ! I don't think I've seen it explained any better, even in physics books.
www.greenbits.com
[ Parent ]

Re: criteria for inducing voltage (3.00 / 0) (#9)
by Jessum Dumguy on Sun Dec 26, 2004 at 10:55:09 PM MST

Hi Ed,
The quote discribed a SINGLE coil leg over
a SINGLE Magnets pole ( N or S).
It would be pulsed DC until you add a second
magnet of oposite pole or brought the
second leg of the coil into play.
Thats the idea I was shooting to relay.
But the lower voltage is true enough and relevent :)

.
Chaos reigns within. Reflect, repent or reboot. Order shall return.
[ Parent ]

Re: criteria for inducing voltage (3.00 / 0) (#10)
by wooferhound on Mon Dec 27, 2004 at 04:35:59 AM MST

Magnets passing coils make AC voltage

Troy did some work to explain this, here are some stories that Troy posted with his experiments and results. The pictures take a long time to load if you are on Dial-Up but they are worth the wait.

http://www.fieldlines.com/story/2004/10/2/11043/6778
http://www.fieldlines.com/story/2004/10/4/91631/6016
http://www.fieldlines.com/story/2004/10/4/221322/612

)}=- W o o f -={(

[ Parent ]

Re: criteria for inducing voltage (3.00 / 0) (#11)
by Electric Ed on Mon Dec 27, 2004 at 05:56:26 AM MST

Hey Jess,
Have you ever seen a coil with ONE LEG?

EE

[ Parent ]

Re: criteria for inducing voltage (3.00 / 0) (#12)
by Jessum Dumguy on Mon Dec 27, 2004 at 11:42:58 AM MST

Hi Ed,
>Have you ever seen a coil with ONE LEG?

Just the one I made yesterday to check the Facts before posting,
Kind of a D shape made out of AWG 30 of 20 or so windings, No core.
Single mag glued onto ruined CD-R disk and spun by dremel.
It pulsed DC. ( half sin ). Well until the glue gave-way. :-/
And before it starts, No I don't think it's in the least an
effeciant coil or design. The question was as I read it that
electrondady1 held the beleif that it REQUIRED a
N and a S pole to induce a current.

>or is it when the coils are over both fields.
>my understanding is that no voltage is
>induced while the coil is over one mag. field.

It's the part in the first line of quote above
about " BOTH FIELDS that I looked to address.
Two or more coil legs are not required just desired.
Thats to say,
I wouldn't want wooden wheels on my car but they'd work. ;)

.
Chaos reigns within. Reflect, repent or reboot. Order shall return.
[ Parent ]

Re: criteria for inducing voltage (3.00 / 0) (#5)
by tecker on Sun Dec 26, 2004 at 05:03:23 PM MST

here's some basics of alinment of magnet to inductor

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magfor.html

Re: criteria for inducing voltage (3.00 / 0) (#6)
by electrondady1 on Sun Dec 26, 2004 at 05:04:11 PM MST

electric ed , just the fellow i wanted to talk to. thanks for those diagrams. it was some of your projects that triggered the post. you once decribed a stator design you had made were instead of multiple wires you used a single copper rod as the leg of each coil . this method got me thinking. would it not also be posible to cast (lost wax or open mold) in copper an assembly that would act as a comlete multi coil setup. in context of what i think is called the wave form method. three zig-zag copper castings shaped like the letter c each would take the place of each phase of a three phase system. i enjoy winding coils but to get the power i need i think i'll need about 30 1000 watt genies.

Re: criteria for inducing voltage (3.00 / 0) (#7)
by Electric Ed on Sun Dec 26, 2004 at 07:05:20 PM MST

I think the projects you are referring to were done by Windstuff Ed.

EE

[ Parent ]

Re: criteria for inducing voltage (3.00 / 0) (#8)
by electrondady1 on Sun Dec 26, 2004 at 08:39:31 PM MST

i beg your pardon electric ed.!!! there is a lot going on at this forum. with multiple dans and multiple eds to keep track of,and an explosion of information to go through its difficult for a fellow to keep it all straight. you are a heavy weight in your own right. i follow your postings and comments closly. if i am not misstaken , you hail from Pince Edward Island (the best potatoes in the world) and you have done a lot of construction and research into multi magnet multi coil multi stator designs. you also posess an incredable over view on the production of electrical energy and the generosity of spirit to share your knowlege. hope thats enough butter ed. the design i'm trying to perfect has three stators and two mag disks, i utilise both sides of the mags. when using air core mags on both the inside and outside (no iron core behind outside units) i tested out at about 150% voltage over a one stator two disk configuration.volts don't seem to be a broblem to produce, its the amps/resistance i'm wresling with.

Re: tomli (3.00 / 0) (#14)
by electrondady1 on Sun Mar 06, 2005 at 10:49:08 AM MST

hello tomli. this old post is in my hot list try to post to the main poard.

criteria for inducing voltage | 13 comments (13 topical)

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