Perpetual Motion

[frankthompson]

I had another perpetual motion idea, and this time I made a 5 minute website about it.

http://www.freewebs.com/frankthompson

Could somebody please tell me why this won't work?

[aommaster]

Hmmm... the digram is not really clear. But, are you trying to say that the magnets on the side will attract the magnets on the whell, thus spinning it forward? In that case, then, the magnets would not really work, as the positive pole of the magnets would meet first with the positive pole of the magnets on the wheel, thus repelling it.

[frankthompson]

When you spin the wheel counter-clockwise, each magnet on the wheel should go past a magnet with bismuth around it. When the wheel magnet is past the other magnet, the positive sides of the magnets will be able to "see" each other clearly and will repel.

[aommaster]

each magnet on the wheel should go past a magnet with bismuth around it

 

That's won't happen because as the wheel is going to pass the magnet with Bismuth, they would repel each other, stopping the wheel.

[swansont]

What is the purpose of the Bi? Magnetic shielding?

 

Magnetic fields have zero divergence. What this means is that in any region of space, there will be as many flux lines entering as leaving. The lines always loop around and close in on themselves, so you can't shield one pole they way I think you want. You will concentrate the flux lines in a high-permeability material, but they leave the material, too.

 

Also: Magnetic forces do no work.

[Guest DJSinVenTor]

Howsabout trying this with electromagnets around the outside... With an alternating current passing through the electro magnets.

[drz]

because then you need to supply energy to make it work. If your supply of energy comes from an outside source, it isn't perpetual motion.

 

Even, if for some reason you could get a wheel spinning via magnets (Which I think has been done) you could not really draw any energy from it.

 

Hook up a pulley to your wheel, which turns an alternator. As you demand more and more energy from the alternator, it opposes the input motion from your magnet wheel more and more. Eventually, it will sieze up as the energy of the wheel will be determined by the strenght of the magnets, which can not be adjusted.

 

Perpetual motion is not possible. Accept it people. Does this mean free energy (as in, money) is not possible? Not at all. It is just a matter of enough people putting their heads together to work with the resources at our disposal. You want to make energy, figure out how to build a really effiecent mini hydro station, or windmill. Maybe you can use a solar oven to boil water into steam, which in turn spins a turbine.

 

And burning wood is still quite viable. Especially if you have alot availible. Take it from someone who has wasted alot of time on PM, its all been said, its all been tried, and none of it works.

[Rasori]

Is perpetual motion not possible, or just not possible with friction and/or gravity? (I'm thinking friction has more of a role than gravity, but that's not necessarily true. I never really thought about perpetual motion before...)

[drz]

True that you could get a wheel spinning faster, and more stable with frictionless bearings and no (or little) gravity. But as soon as you start using the energy of that spinning wheel to move electrons (make electricity) it exerts an opposite force against the rotation of the wheel. This will stop the wheel, unless something maintains the wheels rotation.

 

Quests for PM brought us the Flywheel, which is used on any IC engine, several industrial machines, pottery wheels. With a little input energy, you can get the wheel spinning. However, we have not found a way to keep the wheel spinning without maintaining some amount of input.

 

Lookup FES (Flywheel Energy Storage)