Electromagnet vs Neodymium magnet

Thread Starter

pctechtv

Joined Aug 10, 2016
21
Is the result that you can get from an electromagnet always the same thing as a magnet that is not electro? What I mean is; I have a powerful magnet that I use to pick up metal parts, could the same thing be configured with an electromagnet. Or a better way to ask this is the magnetic field given off by an electromagnet the same exact as a non-electromagnet? I do not know much about this, so any help is welcome? Not knowing that much about magnets I don’t know if I should mention that the non-electromagnet I am working with is neodymium. Thanks
 
Not sure of what you're asking. However, in an electromagnet, the magnetic field can be quickly changed by controlling the amount of electric current in the winding. The magnetic field of the magnet is constant.
 

mcgyvr

Joined Oct 15, 2009
5,394
Yes its possible to replicate the forces/effects of a regular magnet with an electromagnet.
The physical size of the electromagnet may be quite different though.
 

mcgyvr

Joined Oct 15, 2009
5,394
Well.. it really depends on the forces we are talking about here, how the electro will be powered/designed and cooled,etc...
For a project like small metal objects I would guess your electromagnet would be a bit larger...
 

crutschow

Joined Mar 14, 2008
38,526
Or a better way to ask this is the magnetic field given off by an electromagnet the same exact as a non-electromagnet?
Both magnetic fields are the same.
There's no way to differentiate them by examining the fields.

The do have some really strong permanent magnet lifting devices that can be turned on and off by mechanically moving the magnet inside so it cancels the external field when you want it to release its load.
 

mcgyvr

Joined Oct 15, 2009
5,394
Both magnetic fields are the same.
There's no way to differentiate them by examining the fields.

The do have some really strong permanent magnet lifting devices that can be turned on and off by mechanically moving the magnet inside so it cancels the external field when you want it to release its load.
Yep.. Very common on dial indicator bases to allow you to just stick it to a metal surface to indicate off then turn the knob to release the magnetic force and easily move it somewhere else..
 

jpanhalt

Joined Jan 18, 2008
11,087
The magnetic field with superconducting magnets, e.g., as used in NMR's, cannot yet be duplicated by any permanent magnet. Thus, electromagnets can be stronger.
 
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