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• Modeling the Thermal Behavior of Permanent Magnet Synchronous Motors

  466-477

  Abdelhakim Lotfi

  Dániel Marcsa

  Zoltán Horváth

  Views:

  266

  The aim of this study is to present a thermal analysis of a permanent magnet synchronous machine based on finite element method. The developed model can be used to predict temperature distribution inside the studied motor during the rated operation. Electromagnetic computation is carried out with the aid of two 2D finite-element (FE) simulations on the cross-section of the PM motor. To analyse the process of heat transfer in an electrical machine, empirical correlations are used to describe the convective heat transfer from the different surfaces of the PM motor. The heat transfer coefficient is determined using dimensionless numbers and Nusselt number. After the loss calculation, the temperatures of the machine are calculated by using 3D finite element method. The results obtained by the model are compared with experimental results from testing the prototype electric motor.

• The Effect of MMS Lubrication on Surface Roughness During Machining

  452-457

  Attila Kári-Horváth

  Tamás Pataki

  Zoltán Szakál

  Views:

  205

  I display this paper the chipping front metal of cutting allocated geometric, considering particular the friction. I catch the attention energy's balance sheet someday metal of cutting, open one new direction the manufacture technology. I display this new direction's metal of cutting condition. but built I delineate his paper final division this new policy searching programme, consumed trial instruments as well as the evaluation's mode.

• The Mechanical Properties of 3D Printed CuZn28 Brass Specimens with Different Orientations

  253-259

  Zoltán Szakál

  Attila Kári-Horváth

  Tamás Pataki

  Miklós Odrobina

  Views:

  404

  In this paper, the properties of CuZn28 brass raw material were presented. The 3D printed metal specimens are made from this material with different orientations. Their mechanical properties (tensile strength, yield strength) and elongation were investigated according to MSZ EN 6892-1: 2012 standard. The strength of the different printing directions is analyzed and it is determined which printing direction is the most favourable. Finally, the effect of the different printing directions upon the structure of the material is studied.