Is there a formula to calculate the distribution of magnetic field strength in space for a 4mm diameter (3mm) magnet?

一沙一世

Is there a formula to calculate the distribution of magnetic field strength in space for a 4mm diameter (3mm) magnet? [Copy link]

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Is there a calculation formula for the distribution of the magnetic field strength of a 4mm diameter 3mm samarium cobalt magnet in space?

maychang

『Diameter 4mm Baidu 3mm SmCo Magnet』

I don’t know what “Baidu 3mm” means.

maychang

No matter what "Baidu 3mm" means, the magnetic field distribution of any permanent magnet cannot be calculated because we don't know how the initial magnetization of the permanent magnet is distributed.

For example, for a cylindrical permanent magnet, its magnetic poles (where the magnetic lines of force enter and exit the magnet) can be on the two end faces of the cylinder, or on a certain diameter of the cylinder. If it is a rectangular parallelepiped, the magnetic poles may appear on any of the three axes of the rectangular parallelepiped. For a ring shape, the magnetic poles may appear on the two end faces, or on the outer and inner circumferences of the ring.

一沙一世

maychang posted on 2022-6-22 09:21 "Diameter 4mm Baidu 3mm Samarium Cobalt Magnet" I don't know what "Baidu 3mm" means.

Wrong, it's thickness.

chunyang

It is impossible to predict and calculate, because the magnetization process is unknown. Even if it is known, it is not enough, because the material is not as simple as its components, and there are also the effects of time and environmental parameters.

Gen_X

If it is not magnetized, it may be zero.