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Magnetic Couplings
03-21
/ 2025
The circular Halbeck array is a special shaped magnet structure designed by combining multiple magnets with the same shape but different magnetization directions to form a circular magnet, in order to enhance the uniformity and stability of the working surface or central magnetic field. The permanent magnet motor using Halbach array structure has an air gap magnetic field that is closer to a sine distribution than traditional permanent magnet motors. With the same amount of permanent magnet material used, the air gap magnetic density of Halbach permanent magnet motors is higher and the iron loss is smaller. In addition, Halbach ring arrays are widely used in permanent magnet bearings, magnetic refrigeration equipment, and magnetic resonance equipment.
03-19
/ 2025
Neodymium iron boron, as the third-generation rare earth permanent magnet material, has been widely used due to its excellent magnetic properties. However, neodymium iron boron magnets also have disadvantages such as low Curie temperature, high temperature coefficient of coercivity, and poor chemical stability. In addition, the huge consumption of praseodymium, neodymium, dysprosium, and terbium rare earth resources has raised concerns about environmental damage and the sustainability of rare earth resource protection. Therefore, while continuously improving the performance of neodymium iron boron permanent magnet materials, magnetic material practitioners are also actively developing other new types of permanent magnet materials.
02-26
/ 2025
Behind the stunning visual effects of 'Ne Zha: The Birth of the Demon Child', a silent magnetic revolution is quietly unfolding. From the particle effects of Huntianling to the quantized rendering of Nezha's out of body spirit, from the dynamic simulation of mountains and rivers to the physical modeling of Aobing Ice Dragon scales, the technical principles related to magnets are deeply integrated into every aspect of special effects production in digital form. This magnetic application that spans the physical world and digital space is redefining the technological boundaries of the animated film industry.
02-07
/ 2025
The measuring tool for magnetic fields usually uses a Gaussian meter, also known as a Tesla meter. The following figure shows the widely used Japanese KANETEC Gaussian meter.
01-21
/ 2025
In recent years, the magnet industry has shown a rapid development trend worldwide, with technological advancements, widespread applications, and sustained market demand making it an important component of the industrial and technological fields.
01-17
/ 2025
In the field of electromagnetics, in addition to using the general SI international system units, CGS Gaussian system units are also used. This sometimes requires unit conversion for friends who come into contact with magnetic materials, and the conversion calculation between these two unit systems is very complex. For the convenience of everyone, we have systematically summarized the units in electromagnetics and the conversion relationships between different unit systems. You are welcome to collect them for future reference.
01-15
/ 2025
The generation of magnetic fields can be divided into two aspects: one is based on the motion current (electromagnetic induction), and the other is based on the spin of the fundamental particles that make up matter. The first type is the magnetic effect of electric current, which is familiar to us. After a wire is electrified, free electrons move in a directional manner to generate a magnetic field. The second type is the magnetic field generated by the substance itself, which is the main topic we will introduce today.
01-10
/ 2025
At present, most mainstream permanent magnet brushless motors use surface mounted or embedded magnetic tiles to form a circular magnetic circuit. However, the splicing magnetic ring has disadvantages such as high precision requirements for magnetic tile processing, difficult assembly, poor smooth transition of magnetic poles, and severe motor noise. Moreover, this structure requires a frame structure made of soft magnetic materials to fix the magnetic tiles, which affects assembly efficiency.
01-08
/ 2025
In recent years, the price fluctuations of rare earth raw materials such as praseodymium neodymium have been significant, causing great difficulties and constraints in terms of cost for neodymium iron boron production enterprises and end application enterprises. Cerium Ce and praseodymium neodymium PrNd, both rare earth elements, have similar structural characteristics and are extremely abundant in the Earth's crust. When used in neodymium iron boron magnets to replace Pr and Nd, it can not only effectively achieve the balanced utilization of rare earth resources, but also significantly reduce the production cost of sintered neodymium iron boron. At present, almost all neodymium iron boron production enterprises in China have been involved in the development and production of cerium magnets. The annual output of new cerium magnets has reached about 50000 tons, and the scale is constantly expanding.
01-05
/ 2025
The application of magnets is often based on the principle of repulsion between the same poles and attraction between opposite poles, or the adsorption of ferromagnetic substances by magnets, such as various magnetic attraction devices, magnetic connection structures, magnetic separation equipment, magnetic transmission equipment, etc.
01-03
/ 2025
The usage scenarios of neodymium iron boron permanent magnets can be roughly divided into adsorption, repulsion, induction, electromagnetic conversion, etc. The requirements for magnetic fields vary in different application scenarios.
12-30
/ 2024
The rusting of magnets is a complex process that involves multiple factors. The following are the main reasons for magnet rust: