Wide Application Of NdFeB Magnets In The Auto Motive Industry

Neodymium iron boron magnets are widely used in medical, industrial and all areas of life activities; especially in the automotive industry field they are widely applied.

With the development of economy, the automobile becomes more and more popular, and now there is an annual output of 59000000 cars in the whole world, while the automobile industry is one of the fields where the neodymium iron boron magnets are applied widely. In each car, generally there has 30 parts using neodymium iron boron magnet, while the use of micro motor number can be as high as 70 in some luxury cars, to complete a variety of control action of the cars. According to the current average using number, we can predict the need of motors will increase from eight hundred million to sixteen hundred million, and each car would need 102 grams of neodymium iron boron magnet.

As the development direction of miniaturization, lightweight and high performance, there will be higher request for the neodymium iron boron magnets used in the car, which will speed up the development of neodymium iron boron magnet, especially the bonded NdFeB permanent magnet.

  

Something About Neodymium Iron Boron Magnet

Application of the magnet is not uncommon in daily life, this paper introduces some knowledge about neodymium iron boron magnets.


First of all, many people may wonder how long the magnetism of neodymium iron boron magnet can last. About this question, neodymium iron boron magnet has high coercive force, so generally, in the natural environment and the general conditions of magnetic field there would not be demagnetization or changes of magnetism. Assuming the environment is appropriate, even after a long time of use, the loss of magnetism will not be great. So in practical application, we often ignore the factor of time effect on the magnetic properties. But if working in harsh environments for a long time, the magnet can appear demagnetization as well.

So, what is the main influence factor of neodymium iron boron magnet’s magnetism? It is the environmental temperature. Since the sintered NdFeB is very sensitive to temperature, the instantaneous maximum temperature and sustained maximum temperature of environment may lead to different degrees of magnet demagnetization, including reversible and irreversible demagnetization, and recoverable and unrecoverable demagnetization.