Sintered Neodymium Magnets History and characteristics

Rare earth permanent magnet materials are metal and ferrite systems developed after the success of the third generation of permanent magnet materials. Rare earth permanent magnet materials since the advent of the 60's, has been rapid development, according to its development and application of the time sequence can be divided into four generations:

The first generation of SMCO5 Department of materials; The second generation is SM2CO17 magnet; Third generation was 80 years The successful development of the NdFeB-based magnetic material, due to its excellent performance and low price quickly in many areas replaced the SM2CO17 magnet, and soon realized the industrial production; the fourth generation of rare earth iron nitrogen RE-FE-N) and rare earth iron (RE-FE-C), are still in research and development.

NdFeB permanent magnet invention in 1983, when the electronic computer, office automation, home appliances and the popularity of miniaturization of the critical moment, the urgent need for strong magnets, NdFeB not only high magnetic properties, and low prices, it came to the magnet Has brought a revolutionary change, while the global computer, communications and other industries have been rapid development, is currently the main force of rare earth magnetic materials, is a well-deserved permanent magnet king.

Neodymium Iron Boron is hard and brittle,since the surface can easily be oxidized corrosion,the surface of NdFeB magnet must be coated.NdFeB rare earth permanent magnet material as a kind of high energy product and coercive force,while the advantages of high energy density makes NdFeB materials in modern industrial and electronic technology has been widely applied.NdFeB has the advantages of cost-effective,with good mechanical properties, it is the most powerful and advanced commercialized permanent magnets.

Application

Sintered Neodymium Iron Boron magnet has excellent magnetic properties,widely used in Electronics,MRI, VCM, DVD / CD memory, CD pickup, Electric bicycle (EB) and Electric propulsion (EAV), Energy vehicles, Hybrid car,

Loudspeakers, Magnetic Separators,Oil and Food industries, Medical Equipment,Aerospace ,Air conditioners, air compressors, Fans , Intelligent robot, Elevator and industrial fields etc.

Apply Specific Examples

1. Compared with the traditional motor, rare earth permanent magnet without iron core motor with high efficiency, light weight, small size, good control speed, reliability and other characteristics, can be widely used in wind power, electric vehicles, industrial motors, household motors And other fields. In the industrial energy-saving motor, the focus of energy-consuming industries, fans, pumps, compressors and other general equipment, about 40% of power consumption, the use of rare earth permanent magnet-free core motor drag general equipment operating system efficiency can be increased by an average of 20% 40%.

2. The efficiency of the generator can be increased to more than 85%, while to use of permanent magnet generators, and it also to do the wind turbine and the generator directly coupled, eliminating the gearbox, thereby improving reliability, reduce system noise, Maintenance cost.

3. Energy-saving appliances is also an important alternative to the future of NdFeB applications. Energy-saving motor field will produce 10 times higher than the current demand for NdFeB material. Inverter air conditioner as a result of comfort, energy saving and other characteristics, is bound to become a trend in the future. Rare earth permanent magnet motor will be widely used in air conditioners, air compressors, fans, inverter air conditioner and other energy-saving household appliances.

4. New energy vehicles will be a strategic emerging industries, is currently in the promotion and application of new energy vehicles due to permanent magnet synchronous motor energy efficiency is extremely high, both small and light weight advantages, is one of the core of new energy vehicles, Hybrid electric cars, hybrid commercial vehicles, pure electric commercial vehicles, pure electric cars, fuel cell vehicles are used permanent magnet motor, NdFeB has been fully able to meet the needs of new energy vehicles motor.

5. Wind power push permanent magnet market, direct drive permanent magnet wind turbine directly connected with the wind turbine, low speed, the number of poles, there is no gear box, the grid has a better integration, making direct drive permanent magnetic The advantages of generators in offshore wind power are obvious.