In recent years, sintered NdFeb radiation (multi-level) magnetic ring is the new direction development of sintered NdFeb permanent magnetic materials. Mainly used in high-performance permanent magnet motors and sensors, with high precision, smooth operation and low noise advantages. It is recommended for high speed, high precision control motors. It has been widely used in the high-speed drive motor, servo motor and other industrial equipment automation, digital, intelligent equipment and other fields. With the automation and precision of equipment and the development of production technology and control technology in permanent magnet motor design, The sintered NdFeb multi-level radiation magnetic ring used in high-performance permanent magnet servo motor has broad application prospects in automobile, CNC machine tools, household appliances, computers, robots and other fields. Therefore, Xinfeng magnetic materials company in the field of sintered NdFeb radiation multi-level magnetic ring has achieved preliminary good results and development.
The existing permanent magnet motor usually uses magnetized sintered NdFeb tile splicing ring. Due to the limitation of processing accuracy such as tile magnet angle, the dynamic balance of splicing magnetic ring is poor, and the transition zone between magnetic poles is large, which makes the motor produce noise and vibration. In order to make the motor rotor have a better dynamic balance, the magnet installed in the rotor needs to be polished, otherwise it will directly affect the performance of the motor. The magnetic tile has been magnetized before installation, which increases the difficulty of grinding and leads to a significant increase in installation cost.
Sintered NdFeb radiation (multi-level) magnetic ring overcomes the shortcoming of spliced magnetic ring, and can replace the traditional tile shape. And such permanent magnet has the high processing accuracy and can be directly magnetized into multi-level on internal and external surfaces and easy to install. Because of the small transition zone between poles and good dynamic balance, the noise and vibration of the motor are reduced and the performance of the permanent magnet motor is improved. And the efficiency of the motor can be effectively improved due to the complete radiation orientation.
NdFeb radiation (multi-level) magnetic ring according to the production method can be divided into: bonded NdFeb radiation (multi-level) magnetic ring, hot extrusion NdFeb radiation (multi-level) magnetic ring, powder metallurgy sintered NdFeb radiation (multi-level) magnetic ring. Advantages of bonded NdFeb radiation (multi-level) magnetic ring: no magnetic field limit and simple molding; disadvantages: Low performance with expensive price. Advantages of hot extrusion NdFeb radiation (multi-level) magnetic ring: no magnetic field limit, more suitable for the preparation of radiation ring; disadvantages: high cost. Advantages of powder metallurgy sintered Ndfeb radiation (multi-level) magnetic ring: excellent magnetic properties, low cost; disadvantages: easy cracking deformation, difficult design in high radiation orientation magnetic field.
With the continuous optimization and improvement in process of our sintered NdFeb radiation (multi-level) magnetic ring, the design and orientation of magnetic field will be further developed and optimized in the rare earth magnets.
Post time: Nov-15-2016