China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Radial magnets are cylindrical, toroidal, or arc-shaped magnets, the direction of its magnetization is distributed along the radial direction, radial magnetization of the magnet due to its unique magnetic field distribution characteristics, in some applications to improve efficiency and precision, how to play the best use of radial magnets, the following editorial for you to provide a number of methods and recommendations.
Optimize the magnetic circuit;
The position of radial magnets in a system is closely related to the design of the magnetic circuit, and a reasonable magnetic circuit design can fully utilize the advantages of radial magnets. In motor or sensor applications, the size of the air gap between the radial magnet and the sensing element (e.g., Hall sensor or coil) directly affects the flux transfer efficiency. In order to minimize flux losses, the air gap should be designed to be as small as possible while ensuring the stability of the mechanical structure.
Typical Radial Magnets - Radial Sintered NdFeB Arc Magnets
Selection of high-performance magnet materials;
Use rare-earth NdFeB high-performance rare-earth permanent magnet materials, and choose the appropriate material grade according to the operating temperature, such as N45SH, N48UH, etc.
Selection of high permeability materials;
Choose high permeability materials (e.g., soft iron) as the backing plate, optimize the thickness of the backing plate, and enhance the magnetic field strength.
Choose a corrosion-resistant coating;
Nickel plating (NiCuNi 3-layer) is one of the commonly used anti-corrosion coatings with good corrosion resistance and mechanical strength for most environments. For applications that require a higher level of protection, epoxy resin coatings are recommended, which provide better protection against water and corrosion, especially in wet or chemically aggressive environments.
The performance of radial magnets is often closely related to other components in the system, such as the rotor and stator material and shape of the motor. To maximize the benefits of radial magnets, they need to work well with other components. For example, in motor design, the stator should be designed to match the magnetic field distribution of the magnet to ensure maximum flux transfer efficiency.
Related Radial Magnet Selection;
Radially magnetized ring magnets
The following article may be useful to you;
What is a radial magnets? What should I consider when buying?