How to harness energy from magents

[Jeff7]

If you had a magnetic drive that spins at 2k and slows down over an exended period of time due to centrifical force, then it could be creating power even when coasting just from the magnetic field created. Or you could keep it going at a steady rate buy using pulses instead of constant power.

That magnetic drive needs to be spun up to 2000rpm though. That takes energy to do. You will always get less energy out of that spinning disc than you put in, unless you figure out some way to eliminate friction.
That's all a flywheel does - you spin it up, and the energy is stored in its momentum. As you draw energy from it, it slows down. The energy gained, magnets or no magnets, is less than what you put in.

Think of the perpetual movement of waves in the ocean.

Can't. They're not perpetual, at least not in the "perpetual motion" sense. Earth receives many MANY terawatts of energy from the Sun, constantly. You get uneven heating, which leads to turbulence. You've also got heat from inside Earth, a bit from radioactive decay, and a lot just leftover from its formation.

Does moving ships back and forth through the waves make the earth slow down? Same goes for wind turbines. How comes the earth's orbit does not decay when we harness the power?

Orders of magnitude. Earth is huge, and it's made mostly of rock and metal. The thin film of water that covers part of the surface is a very small portion of that, and the human population is far less than that.

A freight train will slow down when it runs into a small swarm of 200 fruit flies.

Basically, yes, waves (really tidal forces) are slowing the Earth's rotation. This is a measurable effect, and you can also see it in the recession of the moon's orbit. Do ships and wind turbines change the Earth's rotation? Sure. But the Earth has a *lot* of angular momentum...the effect is very small.

Very large earthquakes also change the earth's rotation.

Thermodynamics and conservation of energy, they are a thing.

Yes, you know...that stuff.

Eventually, Earth's rotation will slow until we're tidally locked with the Moon, so the same side of Earth will always face the Moon.

 

[piasabird]

Barometric pressure makes wind, along with the rays of the sun.

 

[Matt1970]

He's saying that it's similar to having a big boulder on top of a hill. Yes that's potential energy, but it's in no way perpetual. Unless you've got Sisyphus to roll the rock back up perpetually.

I am not saying any of it is perpetual motion. Perpetual motion does not exist.

 

[SecurityTheatre]

If you had a magnetic drive that spins at 2k and slows down over an exended period of time due to centrifical force, then it could be creating power even when coasting just from the magnetic field created. Or you could keep it going at a steady rate buy using pulses instead of constant power.

The act of extracting energy from a magnetic field induces an opposite magnetic field. This is related to electromagnetic induction and is the reason why a turbine, when put under load, creates resistance against the rotation of the turbine.

This electromagnetic induction can be a bit complicated to understand. Check out this video: https://www.youtube.com/watch?v=KuUMUvwvML8


As a result, extracting a meaningful amount of power inherently causes the turbine to slow.

Plus, when you say "a magnetic drive", you are referring to a motor. An electric motor. This requires energy input in order to go faster. The youtube video in question in this thread has some trickery involved to accelerate it. What it is, i'm not quite sure.

When you say "pulsed", that's just equivalent to a brushless or AC motor.

None of this is magic (nor new in the last 100 years), nor does any of it "create" energy.

Think of the perpetual movement of waves in the ocean. Does moving ships back and forth through the waves make the earth slow down? Same goes for wind turbines. How comes the earth's orbit does not decay when we harness the power?

Yes, it absolutely does make the earth slow down.

It just does it at an infinitesimally small amount due to the large mass. We lose about 1.7 milliseconds per 100 years.

That spinning was created by the combined kinetic energy of septillions of tons of cosmic dust falling into a gravity well. Potential energy converted to kinetic, still not magic, nor infinite.

Besides, wind and waves (created by wind) are just basically secondary and tertiary forms of solar power. The sun creates wind and wind creates waves. The sun is powered by nuclear fusion. But I guess by that measure, Ethanol is just a 4th or 5th level derivative from solar power (via photosynthesis), and fossil fuels are just a 7th or 8th level removed from solar power (most probably being derived decayed plant and animal matter).

 

[SecurityTheatre]

He's saying that it's similar to having a big boulder on top of a hill. Yes that's potential energy, but it's in no way perpetual. Unless you've got Sisyphus to roll the rock back up perpetually.

And presuming the Sisyphus is supernatural and doesn't require any energy (nor food) to keep rolling to boulder back uphill.

 

[John.alex]

[FONT=&quot]Hi to everyone on the forum[/FONT] Good to be here, looking forward to joining in, I will help out anyone I can with anything, just ask.

 

[John.alex]

You can move a conductor through a magnet's field to induce electricity. But that's not really harnessing energy from the magnet, that's harnessing energy from the motion

 

[sci guy]

You would be better off trying to work with the Casimir Effect.

Applications[edit]

It has been suggested that the Casimir forces have application in nanotechnology,[35] in particular silicon integrated circuit technology based micro- and nanoelectromechanical systems, silicon array propulsion for space drives, and so-called Casimir oscillators.[36]
On 4 June 2013 it was reported[37] that a conglomerate of scientists from Hong Kong University of Science and Technology, University of Florida, Harvard University, Massachusetts Institute of Technology, and Oak Ridge National Laboratory have for the first time demonstrated a compact integrated silicon chip that harnesses the power of the Casimir effect.[38]

 

[Born2bwire]

You would be better off trying to work with the Casimir Effect.

The Casimir force is another conservative force. You can't get energy out of it that you didn't already put into it by assembling the system.

 

[sci guy]

The Casimir force is another conservative force. You can't get energy out of it that you didn't already put into it by assembling the system.

The universe, being a closed system, has this as its basic limitation already - you cannot get more energy from the universe than is already in it. The question would be if you can get more energy out of the built product out of it than you put into building it.

 

[SOFTengCOMPelec]

Perpetual (free) limitless energy, is VERY easy.

All you need are these two things (1 and 2) :-

1. A complete lack of understanding, about the laws of Physics and Mathematics

If you are looking for step 2, please re-read the bit where it says "Total lack of understanding of Mathematics".
1=2, because 1=won, and if you win you get TO choose a prize.
Since TO=two=2
If you think the above is nonsense, please re-read peoples explanation on how their Perpetual (free) limitless energy scheme works.

 

[Born2bwire]

The universe, being a closed system, has this as its basic limitation already - you cannot get more energy from the universe than is already in it. The question would be if you can get more energy out of the built product out of it than you put into building it.

The Casimir force is conservative, there is no energy to be gained from it. The energy that you get from the force is the energy that you get when you bring the objects into close proximity to each other. However, it is of use and consequence to those who manufacture NEMS and MEMS devices. The "power" that is referred to in the wiki quote is a metaphorical power, not physical. If you actually read the linked paper, it is a demonstration of the Casimir force using a a force measuring device built on silicon.

 

[SecurityTheatre]

The universe, being a closed system, has this as its basic limitation already - you cannot get more energy from the universe than is already in it. The question would be if you can get more energy out of the built product out of it than you put into building it.

Sure, solar panels are an example of that.

Of course, you're extracting it from the sun, primarily, not from the material itself.

Moving energy around takes... energy...