How to select sintered ferrite magnet shapes by magnetic force distribution?

One of the more commonly used tile-shaped sintered ferrite magnets, which has a curved shape resembling a roof tile. Its magnetic distribution is particularly interesting, not uniform, but along that curved surface, the magnetic field strength varies in a gradient. Simply put, magnetic field lines will "focus" from the inner curved surface (usually concave) to the outer curved surface (convex), similar to the beam of a flashlight, forming a relatively concentrated working air gap. So you see it in the speakers of old-fashioned speakers or some motors because it can provide a more directional magnetic field.

Next, let‘s take a look at the ring-shaped sintered ferrite magnet, also known as the magnetic ring. Its magnetic distribution can be said to be the most ‘inward‘. The magnetic field is almost completely enclosed inside the ring, and the magnetic leakage from the outside is very weak. You can imagine it as a otaku who keeps magnetic field lines circulating in his own home. Because of this characteristic, it is very suitable for making inductive magnetic cores and anti-interference magnetic rings, quietly doing its own work without easily interfering with adjacent electronic components.

Finally, there are square (or flat square) sintered ferrite magnets. Its magnetic distribution is relatively "regular" and symmetrical. The two most flat surfaces (usually the North and South Poles) have the strongest magnetic fields and are evenly distributed, with weaker edges. This shape is like a sturdy engineer, providing a stable and uniform magnetic field platform, so it often appears in Hall sensors, magnetic suction cups, or some teaching demonstration tools.

It can be seen from this that tile-shaped magnets are good at generating "focused" magnetic fields, toroidal magnets have the characteristic of "cohesive circulation", and square magnets can provide a "uniform and stable" magnetic force distribution. Engineers will match the most suitable magnetic components for different electrical appliances and motors based on their specific requirements, in combination with the unique magnetic field distribution characteristics of various magnets. The selection of the shape of the magnet is not arbitrary but is based on the precise adaptation to the application scenarios of the magnetic field space.

Expert in customized sintered ferrite magnet solutions, whether it is tile shaped, square shaped, ring shaped or irregular, Tecmag will reply to all inquiries within 24 hours: info@tecomag.net