Radial Ring Magnets for high-end Power tools

Sintered neodymium iron boron radiation (multi-pole) magnetic rings are a new product developed in recent years and another new direction for the development of sintered neodymium iron boron permanent magnetic materials. Mainly used in high-performance permanent magnet motors and sensors, it has the advantages of high accuracy, smooth operation, and low noise, making it the preferred choice for high speed and high-precision control of motors.

The surface magnetic curve of sintered neodymium iron boron multipole magnetic ring (as shown in the figure below) is distributed in a sine wave shape, and its ultra-high surface magnetic field can greatly improve the efficiency of the motor. Without reducing efficiency, the motor can be further lightweight and miniaturized. Sintered neodymium iron boron radiation (multipole) magnetic rings overcome the drawbacks of splicing magnetic rings and can replace traditional tile shaped blocks.

Sintered neodymium iron boron multipole magnetic rings have advantages such as ultra-high surface magnetic field, simplified assembly, stable magnetic circuit, higher mechanical accuracy, assembly with non-conductive magnetic shaft rods, without reducing magnetic performance, and achieving efficient utilization of permanent magnet materials.

1.How to design and select the most cost-effective magnet that meets customer needs?

Magnets are classified into different grades based on their ability to withstand temperature; According to different usage requirements, the same brand is divided into different performance levels, and different performance levels correspond to different performance parameters. In general, designing and selecting the most cost-effective magnet requires the customer to provide the following relevant information,

▶ Application fields of magnets
▶ Material grade and performance parameters of the magnet (such as Br/Hcj/Hcb/BHmax, etc.)
▶ The working environment of the magnet, such as the normal working temperature of the rotor and the maximum possible working temperature
▶ The installation method of the magnet on the rotor, such as whether the magnet is surface mounted or slot mounted?
▶ Machining dimensions and tolerance requirements for magnets
▶ Types of magnetic coating and anti-corrosion requirements
▶ Requirements for on-site testing of magnets (such as performance testing, coating salt spray testing, PCT/HAST, etc.)