Overunity and Magnet motors why I fear it won't work

[Automan]

To both replies above:
I know magnets can operate for long time but how long? Not forever. Magnets in your hard drive will go flat, so will the ones on your fridge door, its just a matter of time. If you suspend one magnet over another and it floats on top it is only a matter of time before it comes closer and closer until it contacts the bottom magnet. You can't ignore this fact just because it is a long period of time. Long period of time doesn't mean forever. My question was about energy required by a magnet to gain its properties and energy that can potentialy be produced by a magnet until it looses its properties.

They don't call them "permanent" magnets for nothing.

A magnet used for work (north poles against north poles) will last about 5,000 years before degrading.
There is a formula of some sort of nuclear decay that is used.
excess heat, and/or disrupting the molecular aliegnment will kill a permanent magnet. Otherwize they are very tough (but brittle)

Your magnet on the fridge door or hard drive should not go flat unless it's not made of the proper rare earth materials.

Cheap magnets obviously will loose their properties.

[Liberty]

I have the sneaking suspicion that a magnet motor even if self-sustaining will never be an overunity machine. If magnets lasted forever this would have been a different story. I hope someone with the necessary knowledge will reply to clear this for me and everyone else. To me a magnet is like a battery. You create it and you charge it. It takes then some time for the magnet to return to its original state with its original properties i.e. no magnetic flux. Just like a battery it will go "flat". If you leave it sitting in the cupboard it will take a very long time. If you use it to do some work it will take shorter time to go flat. The question I want answered is: How much energy is required to create a magnet with particular properties? If this magnet was then used to create electrical energy for example in a device which was self-sustaining and 100% efficient, will the magnet manage to create that same amount of energy before it goes flat? It seems like a logical idea that the magnet will only produce as much energy in its lifetime as was used to create it, and that is if it is used in a machine that is 100% efficient. I am unsure about this and wish someone knew the answer.

Here is the web link that has a short description of the motor that I made mostly out of permanent magnets.  It is: http://www.airlancomputer.com/page8.html

Liberty

[TEguy]

Automan I don't want to be a pain but if a magnet has a life expectancy of 5000 years then it is not exactly permanent is it. They are called permanent not because they last forever but because you can't switch magnetic field off. It is not important whether the magnet will outlive me or not. The important question as I stated before is whether the magnet can produce as much energy in its lifetime as it required to make it. I have been doing some digging around in my spare time but no definate answer yet one way or the other.

[JackH]

Hello TEguy,

All I can say is check out a dc motor.  Chances are it will have permanent magnets for the fields.   

I have an old wheel chare motor that is very old, maybe 30 years.  The permanent magnets are still good as new.   Hard to tell how many hours this thing has on it.   If you think permanent magnets will go dead, how due you explain this. The magnets in this motor can be replaced for around $10.00.  I think there has been more than $10.00 worth of use out of them.

Permanent magnets will last for severial life times if used correctly and not overly abused.  Rare earth magnets are, I am told will last for severial thousend years.   

Later,,,,,JackH

[TEguy]

JackH
A DC motor uses DC to power it - not magnets. The magnet helps in converting the electrical energy to mechanical. Furthermore 30 years is a very short time in comparison to magnet lifetime. I guess the only way to be sure is to build a motor that uses permanent magnets as its energy source and nothing else. Then it can be determined how much energy can be generated with this motor and if it makes sense using it. Since noone has yet built a proper device we just don't know.