Material Types of Multi-Pole Magnetic Rings

Multi-pole magnetic ring is a kind of ring magnet widely used in the field of motors. The characteristic of multi-pole magnetic ring is that there are many magnetic poles on one magnet, which is usually achieved by using professional magnetizing equipment. Through technological innovation, the stability and assembly problems of the user end are solved. It has become the first choice for servo motors such as power tools and EPS power steering motors.

Multi-pole magnetic rings can be divided into neodymium iron boron multi-pole magnet rings, ferrite multi-pole magnetic rings, rubber magnetic multi-pole magnet rings, and samarium cobalt multi-pole magnet rings according to different materials. Among them, the first three are more common on the market.

Among the above multi-pole magnetic ring materials, the one with the strongest magnetic force is the multi-pole magnetic ring made of NdFeB magnet material. NdFeB magnet is known as the "king of magnets" among magnets. It has a very high remanence and is mainly used in high-performance permanent magnet motors and sensors. In addition, according to different processes, NdFeB multi-pole magnetic rings are divided into sintered NdFeB multi-pole rings and bonded NdFeB multi-pole magnetic rings. The cost of rubber magnetic multi-pole rings and ferrite multi-pole magnetic rings is relatively low, but the magnetic force will be relatively weak.

The most widely used products at present are circular magnetic grids, water pump motors, sweepers, etc. The multi-pole magnetic ring made of samarium cobalt material is the most temperature-resistant multi-pole magnetic ring. The maximum temperature of this material can reach 350 degrees. It is the best magnet used in high-temperature environments. As for the number of poles of the multi-pole magnetic ring, it is also customized according to customer requirements. The highest number of magnetization levels can reach hundreds of poles or even more.

The application of multi-pole magnetic rings is not limited to high-performance permanent magnet motors and sensors, but also includes automobiles, CNC machine tools, household appliances, computers, robots and other fields, showing its important role in the development of automation, precision and permanent magnet motor design, manufacturing technology and control technology.