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, Simulation Modeling Practice and Theory , Article in Press, 2008. Kimpián T., Augusztinovicz F. Identification of mechanical properties in brushless permanent magnet motors by means of coil impedance measurement, Proc. of ISMA

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Abstract  

Phase transformation studies carried out on Mn−Al−C permanent magnet alloy employing DSC and electrical resistivity measurements, are reported and discussed. The transformation of the hexagonal Mn−Al phase (disordered and non-magnetic) to the ferromagnetic fct phase proceeds via the formation, in at least two stages, of the ordered orthorhombic phase. The activation energy for the formation of the fct phase is ≈34.65 kcal/mol. Microstructural changes occurring at various stages of the transformation are also studied.

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Pollack Periodica
Authors: Miklós Kuczmann, Tamás Budai, Gergely Kovács, Dániel Marcsa, Gergely Friedl, Péter Prukner, Tamás Unger, and György Tomozi

57 66 Stumberger B., Hamler A., Hribernik B. Analysis of iron loss in interior permanent magnet synchronous motor over a wide-speed range of constant output power operation

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The paper presents simulation results of a two-dimensional permanent magnet synchronous motor, which were calculated by the help of the Infolytica MotorSolve and of the COMSOL Multiphysics, as well. The simulation results were compared with each other focusing on the torque, the magnetic flux density and the magnetic potential of the permanent magnet synchronous motor.

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Abstract  

The structureless background at X-ray and low energy -ray region, resulting from bremsstrahlung due to the stopping of -radiations, causes serious problems in nuclear spectroscopy. In this study, in order to reduce the background and therefore to increase the sensitivity of the nuclear analytical technique and the number of elements observable, a methodology is developed to deflect the -particles by a magnetic field. The experimental setup consists of a permanent magnet /1 kG/, Ge/Li/ solid-state detector, and multichannel analyzer.

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Abstract  

A traditional TG apparatus was modified by placing two permanent magnets producing a controlled magnetic field (TG(M): Magneto Thermogravimetry). This technique proved to be useful to study both structural relaxation and crystallisation of ferromagnetic metallic glasses. Results obtained for the amorphous alloys Fe40Ni40P14B6 and Fe62.5Co6Ni7.5Zr6Nb2Cu1B15, are reported in this paper. Structural relaxation can be evaluated by measuring changes in Curie temperature induced by thermal treatments. Crystallisation in TG(M) is detected through a change in the measured apparent mass (difference between the sample mass and magnetic force driving it upward). These results were confirmed by DSC analysis. Whether the obtained crystalline phase is ferromagnetic, it can be identified through its Curie temperature, measured by TG(M). In fact the value of 770C measured as Curie temperature of crystallised Fe62.5Co6Ni7.5Zr6Nb2Cu1B15led to conclude that the only ferromagnetic crystalline phase is a-Fe. These hypothesis was confirmed by XRD analysis, showing that the first crystallisation yields to a-Fe nanocrystals.

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construction of voice coil type linear motors, but the stator was excited by a still coil instead of permanent magnets. The structure of this prototype can be seen in Fig. 1 . Fig. 1. The first prototype Theoretical basis of this prototype was evaluation of

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] Kovacs G , Up-to-date finite element based simulation for permanent magnet , Acta Technica Jaurisnensis , Vol. 7 , No. 2 , 2014 , pp. 172 ‒ 182 . [15

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] Kuslits M. Model-based control development of permanent magnet synchronous machines (in Hungarian), Publio Kiadó, Győr , 2016 . [17

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. [6] Tanaka I. , Nitomi H. , Imanishi K. , Okamura K. , Yashiki H. Application of high-strength nonoriented electrical steel to interior permanent magnet

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