About Ferrite multi-pole magnetic ring

About Ferrite Multi-Pole Magnetic Rings

Ferrite multi-pole magnetic rings are relatively easy to produce. An ordinary axial multi-pole ferrite magnetic ring can be manufactured as long as a corresponding multi-pole magnetizing fixture is available. These are basic magnet production principles. However, during the actual production process, the quality of ferrite multi-pole magnetic rings is often influenced by various external factors.

We know that magnets come in various performance grades, and each grade exhibits differences in magnetic properties. The most significant variation between grades lies in their magnetism. Even magnets of the same specification may show differences in magnetic performance due to variations in grade. One of the most apparent distinctions is in surface magnetism. However, long-term observations show that surface magnetism alone cannot fully determine a magnet's overall performance.

For instance, consider two ferrite disc magnets: a D10×5MM Y30 ferrite magnet and a D20×5MM Y30 ferrite magnet. The surface magnetism of the D10×5MM magnet is higher than that of the D20×5MM magnet. However, the pulling force of the D20×5MM magnet is greater than that of the D10×5MM magnet. What does this mean? The same principle applies to ferrite multi-pole magnetic rings. For example, compare two Y30 ferrite multi-pole magnetic rings: D50×20×5MM and D50×30×5MM. The surface magnetism of the D50×30×5MM ring is slightly higher, but the torque test indicates that the D50×20×5MM ring has stronger torque. This is because the magnetic area of the D50×20×5MM ring is larger, resulting in a greater suction area.

How to Evaluate the Performance of a Ferrite Multi-Pole Magnetic Ring

The performance of a ferrite multi-pole magnetic ring cannot be determined by surface magnetism alone. Surface magnetism does not provide a complete picture of the magnet's performance, as these rings are inherently magnetically polarized. The surface magnetism of the same product may vary depending on the number of magnetized poles.

To accurately assess the quality of a ferrite multi-pole magnetic ring, a full performance test must be conducted rather than relying solely on surface magnetism measurements.