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Electromagnet using permanent magnets Answered

Hi All,

I'm attempting to make a very small strong electromagnet using permanent rare earth magnets. I want to boost the magnetic field and increase the magnetic force. The magnets are 10mm in length by 5mm in radius. I have 0.4mm2 enamelled solenoid wire for the winding.
My questions are,
Is it possible to increase the force of a permenent  magnet?
Will the induced flux into the magnet compile the force or will the EMF have to be greater to see an effect?
Will paralleling two windings make the EMF stronger?
As the magnets are small I have limited room to wrap windings so is there a more effective method?

Any help would be great!


Discussions

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From a quick glance at the article it seems this is possible. It isn't generally preferred as the permanent magnet will attract even after current is cut off which is undesirable for most applications.
Just make sure to keep the fields of both permanent magnet and electro magnet aligned. Else those permanent magnets could become not so permanent... :)

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Toga_Dan

3 years ago

interesting idea. it shouldnt take too much effort to test.

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mpilchfamily

3 years ago

Don't try to use a magnet as the core of an electro magnet. The magnetic field created by the wire will be fighting that of the rare earth magnet. Either use the strongest rare earth magnet you can find or make a vary powerful electro magnet that can handle a lot of power. But there is only so far you can get with either method when size is an issue.

Limitations in magnetic strength in a small package in one thing holding us back from real world suits like Iron Man's. Long lasting, vary powerful and easily portable power supplies are another.

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Downunder35m

3 years ago

Y_ou either use a strong electromagnet or permanent magnet, you don't mix them.
If you need a very strong eletromagnet with a small footprint check those for milling machines.