Use of magnets to create power?

In summary, members of the forum discussed the possibility of creating a propulsion or power generator using only fixed magnets, but concluded that it is not feasible due to the lack of usable energy in permanent magnets. They also advised against pursuing perpetual motion as it goes against the laws of physics. The use of magnets in electric motors was also explained, with the reminder that magnets are not an energy source but merely a tool to transfer energy. The conversation ended with a discussion on the process of magnetizing materials and the limited amount of energy that can be extracted from magnets.
  • #1
bogus313
2
0
Hi

i have just joined and this is my first post.I was hoping to find out if anyone has(using only fixed magnets) created a propulsion or any kind of power generator.I have a few ideas that id like to try, although there probably fundamentally flawed, if no one else has achieved it. All and any advice would be greatly recieved.
 
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  • #2
Magnets are used to transfer power from power plants to homes and business all the time. But a fixed magnet won't do much.

To supply power you need an input of power, or energy. There isn't much usable energy in a permanent magnet at all.
 
  • #3
bogus313 said:
Hi

i have just joined and this is my first post.I was hoping to find out if anyone has(using only fixed magnets) created a propulsion or any kind of power generator.I have a few ideas that id like to try, although there probably fundamentally flawed, if no one else has achieved it. All and any advice would be greatly recieved.

The thing to understand is that a permanent magnet is not emanating any kind of energy, nor is the field changing or in motion. It's actually as static a phenomenon as a brick.

Magnets seem to emanate a kind of "force field" that should represent energy, but the fact is it doesn't. It won't repel another magnet, for example, unless some outside force first pushes the other magnet into range. This is no different than compressing a spring, or lifting a brick against gravity and dropping it. The outside force is the one supplying the energy.

Regardless, people have been trying to create motors powered exclusively by permanant magnets since they were discovered (I've read claims going back to the 1200's anyway). No one has succeeded for the same reason the brick powered motor has never worked.

Electric motors work by magnetic fields because, being electrically generated, they can be switched on and off, or from one polarity to the other quickly and conveniently, and it is that constant changing of the field that you need to create continuous motion. You can't substitute permanent magnets with their static fields for the 'changing field' coils in a motor and expect to get any motion out of it.

On the other hand, if you think you've found a way around any principle that seems to be in the way, I'd encourage you to try to make a working embodiment. You'll either 1.) succeed, or 2.) learn something.
 
  • #4
thank you for your help.I realized a few mistakes id made last night.I know that magnets don't expel energy and it was my wording that was the problem.i was thinking along the lines of 2/3 permanent magnets(maybe 1 electromagnet powered by the output after the initial input). I was hoping to use their constant expulsion/retraction with a self feeding loop which after reaching a certain speed would create a constant surplus of energy.Yes i know perpetual motion isn't supposed to be workable on Earth but I am hoping i might of spied a way o do it.
 
  • #5
You most assuredly have not. I advise you to simply turn away from even attempting that road, as it will do nothing but lead to failure. Many thousands of amateurs, and even a few professionals, have been down it before simply because they don't know enough about how it works to see that it won't work. Since perpetual motion machines are against the rules for discussing, I advise you to do a google search for sites explaining why perpetual motion doesn't work.
 
  • #6
bogus313 said:
thank you for your help.I realized a few mistakes id made last night.I know that magnets don't expel energy and it was my wording that was the problem.i was thinking along the lines of 2/3 permanent magnets(maybe 1 electromagnet powered by the output after the initial input). I was hoping to use their constant expulsion/retraction with a self feeding loop which after reaching a certain speed would create a constant surplus of energy.Yes i know perpetual motion isn't supposed to be workable on Earth but I am hoping i might of spied a way o do it.

Somewhere in all this, though, you are still making the assumption that magnets are an energy source. Otherwise, you couldn't be concluding there's a way to have a surplus.

I'm thinking what you may not realize is that it takes more energy to push a magnet relative to a coil when you are drawing electricity from the coil than when you aren't. The harder it is to push, the more electricity you get. Generating electricity pushes back on the magnet and slows it down. The electricity isn't ever coming from the magnet, it comes from the energy it takes to push the magnet. The magnet is just a tool that reaches into the wire so you can push the electrons around.
 
  • #7
To bounce off of what zoobyshoe said, think of the magnets as a way to apply a force without having to physically touch something. So they are glorified sticks. You can hit a rock with a stick but it isn't the stick itself that's generating any energy, it is merely transferring it from you to the rock. Without someone behind the stick to make it work, it will never hit the rock.
 
  • #8
bogus313 said:
Yes i know perpetual motion isn't supposed to be workable on Earth but I am hoping i might of spied a way o do it.
We won't help you with this. It is a waste of your time and ours. Thread locked.
 
  • #9
There's a magnet factory near my home. I enjoy watching them make permanent magnets which they do by placing the megnetic material inside a big coil and applying tremendous current.

I suppose that process does some work on the magnet, aligning all those dipoles.
And that energy might be stored in the magnetic field of the magnet.
The most energy you could extract from a magnet would be however much work had been done in magnetizing it, when you de-magnetize it
which isn't a lot.
And you won't won't recover even that much.

There's an experiment decribed in freshman physics books
one wraps two coils of several turns each around a bar of iron,
connects an amplifier and speaker to one,
and applies a very slowly increasing DC current to the other.
The speaker will give "clicks" as magnetism increases. The magnetic realignment of atoms in the iron isn't entirely smooth but proceeds in a "grainy" manner, and the second coil detects those sudden little upward ticks of magnetic flux. .

Give it a try
and read up on magnetism.

In fact I am going to recommend Jack M Janicke's "Magnetic Measurements Handbook" it is best layman's introduction i have ever seen .
I got so interested i built his Fluxgate Magnetometer.
 

1. How do magnets create power?

Magnets create power through the principles of electromagnetism. When a magnet is moved through a magnetic field, it creates a flow of electrons which can be harnessed as electrical energy.

2. What types of magnets are used to create power?

The most commonly used magnets for creating power are permanent magnets and electromagnets. Permanent magnets are made from materials such as iron, nickel, and cobalt and have a consistent magnetic field. Electromagnets are created by passing an electric current through a wire, and their strength can be controlled by adjusting the current.

3. How is the power generated by magnets converted into usable electricity?

The power generated by magnets is converted into usable electricity through the use of generators. Generators contain coils of wire that rotate within a magnetic field, creating an electric current. This current can then be transformed to the appropriate voltage and frequency for use in homes and businesses.

4. What are the advantages of using magnets for power generation?

There are several advantages to using magnets for power generation. They are a renewable resource, as they do not require fuel to create power. They also have a long lifespan and require minimal maintenance. Additionally, magnetic power generation does not produce greenhouse gas emissions, making it a more environmentally friendly option.

5. Are there any limitations to using magnets for power generation?

While there are many benefits to using magnets for power generation, there are also some limitations. One limitation is that the strength of the magnetic field may weaken over time, reducing the efficiency of the power generation. Additionally, the initial cost of setting up a magnet power generation system can be high, although it may be offset by the long-term cost savings.

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