Is there any theoretical limit to the magnetic field strength of permanent magnets? (electric, material)

[MalaMan]

Is there any known theoretical limit to the magnetic field strength of permanent magnets?

Neodymium permanent magnets are becoming stronger by the years, in 2019 the highest grade of neodymium permanent magnets is N54. Other kinds of permanent magnets made from other materials are also being researched.

Given that in a system where an electromagnet made from an air core coil (electromagnet without a ferromagnetic or ferrimagnetic core) is in repulsion against a permanent magnet, the stronger is the magnetic field of the permanent magnet the stronger will be the force of repulsion between the electromagnet and the permanent magnet, with the watts of the direct current (DC) in the electromagnet being kept the same, then the only limit to the mechanical energy output that can be achieved from a rapid pulse of electricity to the air core coil is the theoretical limit to the magnetic field strength of permanent magnets...

[MalaMan]

you are my big loves

[LesLucid]

Magnetism is, to me, such an incredible mystery, a true invisible “force”. I have no answer to your question but had wondered about the ultimate strength of any magnetic field, whether things start to unravel so to speak. Here’s one of the interesting articles I found.

https://wtamu.edu/~cbaird/sq/mobile/...there-a-limit/

[rjshae]

Materials-wise, you can only cram so many atoms into a volume, so the magnetic field should have a maximum possible potential.

[turf3]

I don't really know much about the physics of magnetism, but I expect that:


1) There is in fact a theoretical maximum field strength.


2) No currently available magnets even come close to approaching that theoretical maximum.

[MalaMan]

Originally Posted by turf3

I don't really know much about the physics of magnetism, but I expect that:


1) There is in fact a theoretical maximum field strength.


2) No currently available magnets even come close to approaching that theoretical maximum.

I agree with you, so that means we have A LOT of room to improve the mechanical energy output from fast-pulse repulsion (FPR) between permanent magnets and air core coils in the next few years.

[MalaMan]

Originally Posted by MalaMan

I agree with you, so that means we have A LOT of room to improve the mechanical energy output from fast-pulse repulsion (FPR) between permanent magnets and air core coils in the next few years.

and just reminding that after improving the mechanical energy output it is possible to convert that mechanical energy to other kinds of energy, like converting it to electrical energy, for example

ooops, I didn't say anything

[MalaMan]

For the purpose of magnetic REPULSION maybe using the Meissner effect of SUPERCONDUCTORS could have better results than neodymium magnets... Superconductors would repeal the magnetic field of air core coils when the coils are turned "on", right? Superdiamagnetism...

What you think?

[MalaMan]

Originally Posted by MalaMan

For the purpose of magnetic REPULSION maybe using the Meissner effect of SUPERCONDUCTORS could have better results than neodymium magnets... Superconductors would repeal the magnetic field of air core coils when the coils are turned "on", right? Superdiamagnetism...

What you think?

I guess using superconductors would be cheaper than using neodymium magnets, at least considering the current costs of neodymium magnets

[MalaMan]

Originally Posted by MalaMan

the only limit to the mechanical energy output that can be achieved from a rapid pulse of electricity to the air core coil is the theoretical limit to the magnetic field strength of permanent magnets...

The closer the coil is from the permanent magnet, the stronger will be the repulsion, and when the coil is repealed and moves the farther it gets from the permanent magnet the weaker the repulsion will become.

That's why I guess a fast pulse with very short duration in time, but with stronger current and tension (amperes and volts), is better than a pulse with longer duration in time but weaker current and tension (amperes and volts), if the total of joules of electricity spent are the same.