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NdFeb Magnets Used To Make
Sep 29, 2017

NdFeb Magnets Used to make

NdFeB magnets material production of about 1/2 used to manufacture a variety of magnet motor. Many types of magnet motors, according to AC and DC classification, permanent magnet motor can be divided into 10 kinds of motor names. Permanent magnet synchronous motor, permanent magnet synchronous motor, permanent magnet synchronous motor, permanent magnet synchronous motor, permanent magnet synchronous motor, permanent magnet synchronous motor, permanent magnet synchronous motor, permanent magnet synchronous motor, permanent magnet synchronous motor , Permanent magnet dc motor, permanent magnet stepper motor, permanent magnet brushless motor, piezoelectric motor, Hall motor, limited angle motor, voice coil motor, the use of these motors see Table 20-2. The capacity of the motor is as small as several decibels, ranging from hundreds of kilowatts, and is widely used in modern science and technology and national economy and life. Permanent magnet motor and non-permanent magnet motor compared to the advantages of no need to field winding or exciter, than the high power, small size, light weight, power saving, saving copper and other colored metal. The emergence of the permanent magnetism of the rare earth permanent magnet-rare earth iron-based permanent magnet material has promoted the development of permanent magnet motor: permanent magnet intelligent motor has the advantages of saving resources, high efficiency, small volume and low noise. As the third generation of rare earth NdFeB permanent magnet magnetic properties, so the production of the motor with high power, high efficiency, smaller size, lighter quality, no excitation loss and so on. The application of neodymium-iron-boron magnetic materials mainly uses the magnetic field of Hg, which is proportional to the square root of the maximum magnetic energy product (BH) ™ of the permanent magnet material, so that the available (BH) ™ Continue to improve to explain the development of NdFeB permanent magnet materials.

Progress of Maximum Magnetic Energy Product (BH) ™ for Permanent Magnetic Materials in the Past Century. It can be seen that in the 20th century, every 10 years or so, (BH) ™ leap-style development. From the beginning of the 20th century 15kJ / m3 to the early 90s 400kJ / m3, the average per 10I high 40kJ / m3, of which the last two (BH) ™ jump the maximum value of the 20th century, 70 years from about 100W / m3 increase To 260kJ / m3, and 80 years from Si 260kJ / m3 increased to 400kJ / m3, 10 years to make a high 140kJ / m3

In recent years, people are very concerned about the last three years from the 20th century to the beginning of the 21st century 10 to 20 years, the death from 400W / m3 increased to 500 ~ 600kJ / m3? Some scholars believe that the Mai is very small. A magnetic energy product of a material to a certain extent after the saturation, or; against a platform, in order to have a new leap, the need for a new material. The balance of rare earth elements can ease the shortage of praseodymium neodymium, but also to a certain extent affect the price of metal praseodymium neodymium. A rare earth production enterprises if La, Ce, Gd a large backlog, or the price is very low, it is not conducive to praseodymium neodymium price stability or price. Therefore, it is necessary to increase the amount of rare earth lanthanum, cerium and gadolinium.

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