The Experts below are selected from a list of 188061 Experts worldwide ranked by ideXlab platform
Kees De Kort - One of the best experts on this subject based on the ideXlab platform.
-
Rare earth Permanent Magnets
Journal of Magnetism and Magnetic Materials, 1995Co-Authors: K H J Buschow, F. H. Feijen, Kees De KortAbstract:A survey is given of the state of the art in rare earth Permanent magnet research of materials based on Nd2Fe14B. The magnetic properties of various types of interstitially modified Fe-rich rare earth intermetallics are discussed, including the possibility to apply these materials in Permanent Magnets. © 1995.
Y Sakuraba - One of the best experts on this subject based on the ideXlab platform.
-
observation of anomalous ettingshausen effect and large transverse thermoelectric conductivity in Permanent Magnets
Applied Physics Letters, 2019Co-Authors: Asuka Miura, H Sepehriamin, Keisuke Masuda, Hiroki Tsuchiura, Yoshio Miura, Ryo Iguchi, Y SakurabaAbstract:This study focuses on the potential of Permanent Magnets as thermoelectric converters. It is found that a SmCo5-type magnet exhibits a large anomalous Ettingshausen effect (AEE) at room temperature and that its charge-to-heat current conversion coefficient is more than one order of magnitude greater than that of typical ferromagnetic metals. The large AEE is an exclusive feature of the SmCo5-type magnet among various Permanent Magnets in practical use, which is independent of the conventional performance of Magnets based on static magnetic properties. The experimental results show that the large AEE originates from the intrinsic transverse thermoelectric conductivity of SmCo5. This finding makes a connection between Permanent Magnets and thermal energy engineering, providing the basis for creating “thermoelectric Permanent Magnets.”This study focuses on the potential of Permanent Magnets as thermoelectric converters. It is found that a SmCo5-type magnet exhibits a large anomalous Ettingshausen effect (AEE) at room temperature and that its charge-to-heat current conversion coefficient is more than one order of magnitude greater than that of typical ferromagnetic metals. The large AEE is an exclusive feature of the SmCo5-type magnet among various Permanent Magnets in practical use, which is independent of the conventional performance of Magnets based on static magnetic properties. The experimental results show that the large AEE originates from the intrinsic transverse thermoelectric conductivity of SmCo5. This finding makes a connection between Permanent Magnets and thermal energy engineering, providing the basis for creating “thermoelectric Permanent Magnets.”
-
observation of anomalous ettingshausen effect and large transverse thermoelectric conductivity in Permanent Magnets
arXiv: Materials Science, 2019Co-Authors: Asuka Miura, H Sepehriamin, Keisuke Masuda, Hiroki Tsuchiura, Yoshio Miura, Ryo Iguchi, Y SakurabaAbstract:This study focuses on the potential of Permanent Magnets as thermoelectric converters. It is found that a SmCo$_5$-type magnet exhibits the large anomalous Ettingshausen effect (AEE) at room temperature and that its charge-to-heat current conversion coefficient is more than one order of magnitude greater than that of typical ferromagnetic metals. The large AEE is an exclusive feature of the SmCo$_5$-type magnet among various Permanent Magnets in practical use, which is independent of the conventional performance of Magnets based on static magnetic properties. The experimental results show that the large AEE originates from the intrinsic transverse thermoelectric conductivity of SmCo$_5$. This finding makes a connection between Permanent Magnets and thermal energy engineering, providing the basis for creating "thermoelectric Permanent Magnets."
K Shirai - One of the best experts on this subject based on the ideXlab platform.
-
estimation of assist effects by additional Permanent Magnets in salient pole synchronous generators
IEEE Transactions on Industrial Electronics, 2012Co-Authors: Katsumi Yamazaki, Kazuo Shima, Tadashi Fukami, Kazuyoshi Nishioka, K ShiraiAbstract:The characteristic improvements of salient-pole synchronous generators by inserting additional Permanent Magnets are investigated from both results of finite-element analyses and experiments. First, the assist effects of the Magnets in a megavoltampere-class generator are analyzed by the finite-element method. It is clarified that the additional Permanent Magnets have the effects of reducing magnetic saturation at the rotor-pole bodies, as well as the effects of increasing the direct flux linkage of armature windings. It is also clarified that the output of the generator can be increased by more than 20% by inserting the Magnets without any increase in total machine size and decrease in efficiency. Finally, the characteristic improvements are validated by the experiment of a small prototype generator. The experimental and calculated results are found to be in good agreement.
Karen Smith Stegen - One of the best experts on this subject based on the ideXlab platform.
-
heavy rare earths Permanent Magnets and renewable energies an imminent crisis
Energy Policy, 2015Co-Authors: Karen Smith StegenAbstract:This article sounds the alarm that a significant build-out of efficient lighting and renewable energy technologies may be endangered by shortages of rare earths and rare earth Permanent Magnets. At the moment, China is the predominant supplier of both and its recent rare earth industrial policies combined with its own growing demand for rare earths have caused widespread concern. To diversify supplies, new mining—outside of China—is needed. But what many observers of the “rare earth problem” overlook is that China also dominates in (1) the processing of rare earths, particularly the less abundant heavy rare earths, and (2) the supply chains for Permanent Magnets. Heavy rare earths and Permanent Magnets are critical for many renewable energy technologies, and it will require decades to develop new non-Chinese deposits, processing capacity, and supply chains. This article clarifies several misconceptions, evaluates frequently proposed solutions, and urges policy makers outside of China to undertake measures to avert a crisis, such as greater support for research and development and for the cultivation of intellectual capital.
K H J Buschow - One of the best experts on this subject based on the ideXlab platform.
-
Rare earth Permanent Magnets
Journal of Magnetism and Magnetic Materials, 1995Co-Authors: K H J Buschow, F. H. Feijen, Kees De KortAbstract:A survey is given of the state of the art in rare earth Permanent magnet research of materials based on Nd2Fe14B. The magnetic properties of various types of interstitially modified Fe-rich rare earth intermetallics are discussed, including the possibility to apply these materials in Permanent Magnets. © 1995.
-
Characterization and Manufacturing of Permanent Magnets
Interstitial Intermetallic Alloys, 1995Co-Authors: K H J BuschowAbstract:Permanent Magnets are indispensable in modern technology. They form important components of many electromechanical and electronic components used in domestic and professional appliances. For instance, an average home contains more than fifty of such devices of which at least ten are in a standard family car. Magnetic resonance imaging used as a medical diagnostic tool is an example where large quantities of Permanent Magnets are used in professional appliances. Permanent magnet materials are furthermore essential in devices for storing energy in a static magnetic field. Major applications involve the conversion of mechanical to electrical energy and vice versa, or the exertion of a force on soft ferromagnetic objects. The applications of magnetic materials in information technology are continuously growing.
