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[bistander]

Are you sure about that?
I think that in the center of a magnet or electromagnet, the most "concentrated" magnetic flux (Bm), since on its pole face, the magnetic induction is B = 1/2Bm

Hi rakarskiy, where did you come up with 1/2 flux density on pole face vs middle?
This place has some good tools and info.
bi

[pix]

I do not know...ask Pix, He already tried it...

At the end, it is your time and your money wasted.
Good luck.


Pix

[rakarskiy]

Hi rakarskiy, where did you come up with 1/2 flux density on pole face vs middle?
This place has some good tools and info.
bi

Source:  https://www.dextermag.com

Formulas for calculating permanent magnets
Below are methods and formulas for an approximate calculation of simple magnetic systems based on permanent magnets, recommended by the British company Dexter, which are quite accessible to the understanding of an elderly lumberjack. All subsequent formulas, comments and pictures are taken directly from the company's website, although I cannot vouch for the absolute accuracy of my translation.

The calculation of the magnetic induction of axially magnetized cylindrical magnets with a radius (r) and length (l), at a point located at a distance (d) from the surface, along the axis is carried out according to the formula: (the attachment)

Example:
r=0.5", l=1", d=0.25", B r =12200 Gauss, B=2935.7 Gauss
Calculation by the boundary element method (BEM), B=2788.7 Gauss

В= Br/2   

[bistander]

Source:  https://www.dextermag.com


В= Br/2   

Thanks. I don't agree with your deduction, but this is off topic, so let it ride.
bi

[rakarskiy]

Thanks. I don't agree with your deduction, but this is off topic, so let it ride.
bi

ok, but that's not my conclusion, that's physics.
By the way, just on the topic, the rules for the formation of magnetic circuits, a magnet or an electromagnet in a magnetic circuit and magnetic inductions will be different.