Gaur egungo eta etorkizuneko teknologien garapenean giltzarri dira material magnetikoak. NdFeB imanak trantsizio energetikorako garrantzitsuak dira, sorgailu motor elektrikoetan erabiltzen eta. Aparailu elektroniko askok ere, ordenagailuak edo smartphoneak adibidez, dituzte barnean. Kritikoak diren elementu kimikoak dituzten arren, lur arraroak kobaltoa kasu, hauek gaur egun merkatu handiena du...

In recent years, under the background of global low-carbon development, production NdFeB magnets has increased dramatically. With end magnet life, a large number discarded products will be produced in future. At same time, 6–73% industrial waste manufacturing process magnets. The rare earth content (about 30 wt.%) these scraps is generally higher than that raw ore, and recovery elements from th...

We present the results of a systematic investigation into how coercivity and maximum energy product NdFeB permanent magnets are affected by magnetic geometric microscopic properties. The based on numerical micromagnetic simulations carried out with open source framework MagTense. considered artificially generated realistic microstructures for which we can control number crystal grains as well t...

The note describes measurement of NdFeB permanent magnet (PM) material demagnetization induced by high-energy electron radiation. In experiments we compared N40 and N40SH grades from Stanford Magnets Company, which have different intrinsic coercive forces. Dimensions of the tested PM blocks were close to those that will be used for ERL undulator construction. It was found that depending on dire...

NdFeB permanent magnets (PMs) are widely used in high performance electrical machines, but their relatively high conductivity subjects them to eddy current losses that can lead to magnetization loss. The Finite Element (FE) method is generally used to quantify the eddy current loss of PMs, but it remains quite difficult to validate the accuracy of the results with complex devices. In this paper...

This paper reports the fabrication and characterization of fully-integrated, fully-batch-microfabricated electromagnetic vibrational energy harvesters. The 4 – 15 mm structures utilize embedded NdFeB powder micromagnet technology, and represent some of the smallest magnetic energy harvesters demonstrated to date. Of three different designs, the best performing demonstrated 13.2 μVrms at the dev...