Magnet strength between 2 magnets

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Discussion Overview

The discussion centers around the expected magnetic field strength between two identical magnets, each measuring 0.6T at their surface, when positioned in close proximity. Participants explore the implications of this configuration and inquire about sourcing stronger magnets.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • Vincent inquires whether the magnetic field strength at a specified position between the two magnets would be 1.2T.
  • Some participants suggest that the expected value would be close to 0.6T, depending on the measurement details and the gap between the magnets.
  • One participant explains that if the gap is small, the magnetic field lines from the bottom magnet would enter the top magnet, resulting in a uniform field strength of 0.6T throughout the gap.
  • Vincent seeks recommendations for vendors that can supply stronger magnets, specifically those rated at 1.5T or a minimum of 1.0T.
  • Another participant notes that magnets above 1 Tesla can be problematic and highlights the strong attractive force between the magnets.
  • Suggestions are made to consider using multiple smaller magnets or electromagnets as alternatives to achieve higher magnetic strength.

Areas of Agreement / Disagreement

Participants generally agree that the magnetic field strength in the gap is likely to remain around 0.6T, but there is no consensus on the feasibility of sourcing stronger magnets or the best approach to achieve higher magnetic strength.

Contextual Notes

There are limitations regarding the assumptions made about the magnetic field behavior in the gap, as well as the specifics of the measurement conditions and the sourcing of stronger magnets.

vincenttswong
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Hi all,
I have two identical magnet which measures 0.6T when I put my gauss meter on the top surface. I configured the magnets as below:
upload_2015-4-14_7-23-0.png

I would like to know what should I expect if I measure the strength(Tesla)at the red round dot position? Would it be 1.2 tesla?

Please advise.

Thank you

Regards,
Vincent
 
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Depends on details of the surface measurement, but I would expect a value close to 0.6 T.
 
I agree, provided the gap is small, I would expect 0.6T.
Vincent, an easy visualization why is, imagine the magnetic field lines coming out of the North pole of the bottom magnet. Now, because the top magnet is of equal strength, equally as many field lines need to enter into the South pole of the top magnet. The easiest way? All field lines from the bottom magnet go straight into the top magnet. Meaning, the lines will all be parallel to each other.
That means then the magnetic field anywhere in that gap is the same, and since we know it's 0.6T at the surface of the magnets, we know its 0.6T anywhere in the gap.
 
Thank you for your prompt reply, mfb and rumborak.

Do you guys have any reliable contacts to share, to purchase 2pcs of the abovementioned magnets, but at higher strength, 1.5T, minimum 1.0T?
 
Above 1 Tesla is problematic, but there are many vendors where you can ask what they have.

You do realize that the magnets will attract each other with a force stronger than the weight of a car, right?
 
mfb, do you care to share a few contacts? I am fire fighting with this purchase issue now
 
I don't have contacts, but google finds many magnet vendors.
Where/how would you use those magnets?
 
mfb, the reason I asked for contacts is because I tried too many vendors, but none of them can produce it.
I can't share the application, my client does not allow me to leak it, sorry
 
You could try to put multiple smaller magnets together. Make sure the mechanical support is really strong.

0.6 Tesla is in the range of electromagnets, those could be an alternative.
 

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