Search for dissertations about: "NdFeB"

Showing result 1 - 5 of 6 swedish dissertations containing the word NdFeB.

  2. 1. Permanent Magnet Machines with Air Gap Windings and Integrated Teeth Windings

    Author : Mikael C D Alatalo; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; permanent magnets; NdFeB; special windings; iron powder; synchronous machines;

    Abstract : The thesis deals with axial and radial flux permanent magnet machines with air gap windings and an integrated teeth winding. The aim is to develop a machine that produces a high torque per unit volume with as low losses as possible. READ MORE

  4. 2. Rare Earth Metal–Free Permanent Magnet Generators

    Author : Petter Eklund; Sandra Eriksson; Leijon Mats; Sonja Lundmark; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : Permanent magnet (PM) synchronous generators (SGs) are used in renewable energy production. The preferred PM material is neodymium-iron-boron (NdFeB), which has very high performance and, until recently, low cost. READ MORE

  5. 3. On the System Optimization of Magnetic Circuit with Alternative Permanent Magnets and its Demagnetization

    Author : Jonathan Sjölund; Sandra Eriksson; Leijon Mats; Sami Ruoho; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Permanent magnet machines; Finite element method; ferrite permanent magnets; linear machines; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : Permanent magnet (PM) machines are often associated with the usage of rare earth magnets, due to their high energy density. One such rare earth magnet is the neodymium-iron-boron (NdFeB), which is mainly produced in China. Due to the global scarcity of the rare earth magnets, much interest is put into utilizing other permanent magnet materials. READ MORE

  6. 4. Hydrometallurgical Treatment of Neodymium Magnet Waste

    Author : Marino Gergoric; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; recycling; rare-earth elements; leaching; Keywords: neodymium magnets; solvent extraction;

    Abstract : Recent decades have seen a considerable increase in the usage of rare-earth elements (REEs) in modern technologies and green energy sources. Recycling of REEs out of end-of-life products and E-scrap has become an alternative to mining them out of primary ores due to their supply risk in some countries and the development towards circular economies. READ MORE

  7. 5. Demagnetization Studies on Permanent Magnets : Comparing FEM Simulations with Experiments

    Author : Stefan Sjökvist; Sandra Eriksson; Hans Bernhoff; Mårten Grabbe; Uppsala universitet; []
    Keywords : Permanent magnet; demagnetization; simulation; FEM; Comsol Multiphysics; VAWT; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : In a world where money often is the main controlling factor, everything that can be tends to be more and more optimized. Regarding electrical machines, developers have always had the goal to make them better. READ MORE