GENERATOR- YOU DO THE IN/OUT POWER MATH

[DeepCut]

Did a little experiment today.

With induction, the flux path crossing the coil wire at 90 deg gives maximum induction.

Looking at how Tom's device is setup, nearly fifty percent of the wire is around the ends of the magnet, where i assume there is  lot less flux crossing the wire and therefore wasted wire/electricity.

Here's a pic where i've outlined what i think are areas of waste :

http://qvision.pwp.blueyonder.co.uk/wastedwire.bmp

So i thought, if i wind wire around a circular strip that is the same width as the magnet then ALL of the wire gets a full flux effect and therefore more energy output. Another edded benefit would be that, because the strip's width is small compared to the circumference of the coil-former in the above setup then you get more turns for a given length of wire therefore more induction.

Here's a picture of the new winding/magnet assembly :

http://qvision.pwp.blueyonder.co.uk/tightwind.bmp

So, having made the new assembly and unwound/rewound some wire (3.5 hours !) i hooked it up to the multimeter and ran it.

I got 0.032 VDC

What's wrong with my theory, it sounded good in my head !


Thanks,

Gary.

[TinselKoala]

Well...it's an old thread, but you brought it up in another thread...so...did you ever figure it out?

The links to the images appear to be dead, but from your words I think you are thinking correctly...but your coil seems to be behaving more like a "CEMF cancelling" or noninductive or "bifilar hairpin" wound coil....are your windings strictly in the same direction, or did you reverse direction halfway through?

That's just my guess, if you have indeed designed the magnetic circuit properly. The point is to get the maximum _rate of change_ of the perpendicular component ... E=-d(phi)/dt. Has your new geometry somehow reduced the rate at which the field changes across the conductors, even though you have improved the magnetic coupling?
Just another wild guess.

[DeepCut]

Maybe it has reduced the change rate because the flux is always moving through the coil i dunno, but the magnetic poles are alternating coz it's diametric so ...

i upped a new pic, i no longer have the frame but you can see the concept :

http://qvision.pwp.blueyonder.co.uk/tightwind.jpg


Gary.

[TinselKoala]

The magnet is the shiny thing inside the white cylinder, and the dark stick is its axle, about which it rotates? (a rosewood chopstick?)
I can't quite tell from the picture, but if the magnet is polled on the ends, facing towards and away from the viewer, then that's the problem: you are rotating the magnet around its axis, so the flux in the coil core isn't changing, no matter how fast you rotate the magnet. You should turn the magnet 90 degrees to the axle, so the core piece is swept first by the N pole and then by the S pole as the magnet is spun. Then the flux in the core will be changing at the maximum rate and the voltage should go up. Even better would be to bend the core around further into a good "C" and have the magnet spinning in the gap, bringing its poles alternately near each of the ends of the "C".

[DeepCut]

I said in the post the magnet is diametrically magnetised, along the length of the cylinder.

So my thinking was that if the wire is wrapped around a rectangular strip and that strip was then bent around the path of the magnet, you would be maximising the induction.

I think the wire i used was too thick and there were not enough turns on there, i may take another look at that sometime.

*EDIT ADD*

Ye the magnet is the shiny thing inside the white plumbers pipe section. The axle is made from carbon rod.

*/EDIT ADD*


Gary.