China permanent magnet manufacturer: www.rizinia.com

Is there a magnetic force in the inner circle of the magnetic ring with multi poles in the radial direction?

Today’s topic: is there a magnetic force in the inner circle of a radial ring?
Recently, a customer just asked this question, so today I went to the sample display cabinet and took several multipolar magnetic rings for measurement.
Sample 1 is filled with 8-pole ferrite.

   1532325573839608 - Is there a magnetic force in the inner circle of the magnetic ring with multi poles in the radial direction?

The figure below shows the measured surface magnetic force of ferrite.

   1532325590668125 - Is there a magnetic force in the inner circle of the magnetic ring with multi poles in the radial direction?

The results measured by Japanese Gauss meter show that the external magnetic field is about 1800gs and the internal magnetic field is about 130gs.
The second sample is filled with 4-pole bonded NdFeB in radial direction.

  1532325608450770 - Is there a magnetic force in the inner circle of the magnetic ring with multi poles in the radial direction?

The following figure shows the measured Gauss size of the outer surface of the bonded NdFeB filled multipolar magnetic ring.

   1532325620872294 - Is there a magnetic force in the inner circle of the magnetic ring with multi poles in the radial direction?

The results measured by Japanese Gauss meter show that the inner surface magnetism is about 1400GS and the outer surface magnetism is about 220GS.
According to the actual test, the inner circle of the ring with radial external multipole magnetization also has magnetic force, but it is very small. At present, there is also a radial ring, which can achieve internal and external monopole magnetization.

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