How does the magnetic field change when ring magnets of different sizes are placed in a ring magnet? Will its magnetic field strength and field uniformity be improved compared to a single magnet? Our expectation is that the difference between the middle magnetic field and the edge magnetic field is within 100Gs. We did a test ,first, we get the magnetic field distribution on the surface of the D50*20 axially magnetized cylindrical magnet, as shown in Figure 1:
Figure 1 Changes of magnetic field on the surface of D50X20 cylindrical magnet
Figure 2 Changes of magnetic field on the surface of D50X20+D40X20+D30X20 cylindrical magnet
Figure3 Changes of magnetic field on the surface of D50X20+D40X20+D30X20+D20X20 cylindrical magnet
Figure4 Changes of magnetic field on the surface ofD50X20+D40X20+D30X20+D20X20+D10X20cylindrical magnet
Figure5 D50X20+D40X20+D30X20+D20X20+D10X20+D5X20 cylindrical magnet
Figure6 D50X20+D40X20+D30X20+D20X20+D10X20+D5X20+D2X20+D1X20
Figure7 D50X20+D40X20+D30X20+D20X20+D10X20+D5X20+D2X20+D1X20+D0.5X20+D0.1X20
Figure 8 Comparison of magnetic fields on the surface as rings of different sizes placed inside a D50*20ring
Figure 9 Comparison of edge magnetic fields on the surface as rings of different sizes placed in a D50*20 ring
From figure8，we can see ,the central surface magnetic field does not match our expectations (the difference between the middle magnetic field and the edge magnetic field is within 100Gs)
Figure 9 shows that the magnetic field at the edge increases as the number of rings increases, with a maximum of close to 14000Gs, while the magnetic field at the edge of the D50*20 cylinder is close to 8000Gs.
To sum up, this method cannot improve the magnetic field in the center of the cylinder, that is, it cannot reduce the gap between the central magnetic field and the edge magnetic field.But increasing the edge magnetic field is beneficial to improving the Pull force of the suction assembly.How to improve the magnetic field intensity at the center of the axially magnetized cylinder surface ,we still need to continue optimizing of the magnet combination.
Post time: Oct-30-2023
