International Journal of Applied Electromagnetics and Mechanics - Volume 19, issue 1-4

Authors: Noguchi, So | Matsubayashi, Yutaka | Yamashita, Hideo | Cingoski, Vlatko

Article Type: Research Article

Abstract: This paper describes an interactive visualization system with force feedback device in 3D electromagnetics. Previously, we developed the interactive system that can not only visualize some kinds of field distribution, but make a user feel the magnetic force in 2D electromagnetics simultaneously. The aim of the previous system is mainly educational because physical behavior in 2D electromagnetics is simpler than that of 3D. However, the 3D interactive visualization system with force feedback is required for …design, education and so on, since the realistic model is necessarily used. Therefore, we have developed the 3D interactive visualization system with force feedback device. Show more

Keywords: interactive visualization system, force feedback, virtual reality

DOI: 10.3233/JAE-2004-595

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 385-390, 2004

Authors: Mansouri, Ali | Njeh, Anis | Makni, Zaatar | Trabelsi, Hafedh | Masmoudi, Ahmed | Elantably, Ahmed

Article Type: Research Article

Abstract: The paper is aimed at a 3D finite element analysis (FEA) based investigation of the effects of the influent design parameters of a claw pole transverse flux permanent magnet motor (TFPM) on its torque production capability. As far as the three axially-arranged phases of the claw pole TFPM are acting independently (there is no rotating field in a chaired air gap), the present study is reduced to the case of a single phase concept. It has been …clearly shown that the claw pole TFPM could exhibit a high output torque if its sizing is accurately achieved. Show more

Keywords: transverse flux permanent magnet machine, claw pole concept, torque production capability, finite element analysis

DOI: 10.3233/JAE-2004-596

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 391-394, 2004

Authors: Iannotti, Vincenzo | Hison, Cornelia | Lanotte, Luciano | Luponio, Carlo | Ausanio, Giovanni | Luponio, Cesare | D'Agostino, Amleto | Germano, Roberto

Article Type: Research Article

Abstract: An elastic magnet in bar shape, consisting of permanently magnetized Sm_2 Co_7 micro-particles, was produced. The longitudinal strain and/or force amounts given by this novel material under the action of a longitudinal magnetic field are here investigated in order to evaluate the potential applications in very ductile actuator systems.

Keywords: novel elastic magnet, actuation properties

DOI: 10.3233/JAE-2004-597

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 395-398, 2004

Authors: Rebican, Mihai | Yusa, Noritaka | Chen, Zhenmao | Miya, Kenzo | Uchimoto, Tetsuya | Takagi, Toshiyuki

Article Type: Research Article

Abstract: This paper proposes an algorithm for multiple cracks reconstruction from ECT signals by means of a simulated annealing parallelized on a supercomputer. The algorithm takes not only the profiles of cracks but also the number of cracks as unknown, which is a very important feature from the practical point of view. A fast forward code using a database is upgraded for the rapid computation of the ECT signals of a differential mutual induction probe due to …multiple cracks. The algorithm is applied to the reconstruction of the multiple cracks of a JSAEM round-robin test geometry. The reconstruction result using a simulated signal proves the validity of the proposed approach. Show more

Keywords: eddy current testing, reconstruction, simulated annealing, multiple cracks, parallel computing

DOI: 10.3233/JAE-2004-598

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 399-404, 2004

Authors: Taniguchi, Tetsuki | Nakamura, Kazunori | Yamada, Sotoshi | Iwahara, Masayoshi

Article Type: Research Article

Abstract: This paper presents a novel procedure for eddy-current image processing based on defect-orientations. First, nonlinear filtering technique is used to eliminate the noise and offset component in the ECT signals keeping the shape of defect-origined signals. Then the direction finding and the pattern matching methods are carried out to find the position of the defect with a specific direction. Based on the derived information, the classification of defects and image synthesis are carried out. Through an …application to images derived from samples having defects in various orientations, the effectiveness of the proposed method is verified. Show more

Keywords: eddy-current testing, nondestructive evaluation, image processing, nonlinear filtering

DOI: 10.3233/JAE-2004-599

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 405-408, 2004

Authors: Tsuchida, Yuji | Enokizono, Masato

Article Type: Research Article

Abstract: This paper presents a strain evaluation of mild steel plates by attractors constructed from Barkhausen noise. The strain of magnetic materials affects the magnetic domain. Hence the strain can be evaluated by Barkhausen noise. Barkhausen noise from magnetic materials is a very complicated non-linear wave. Thus Barkhausen noise is examined before and after the tensile stress by attractors to make clear the chaotic behaviour to use it for the strain evaluation.

Keywords: barkhausen noise, chaos, strain evaluation, tensile test

DOI: 10.3233/JAE-2004-600

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 409-413, 2004

Authors: Skowronek, Konrad | Szymkowiak, Piotr | Walczak, Piotr

Article Type: Research Article

Abstract: The evaluation of loss of information in system of magnetic and mechanic forces field coupling was presented in the paper. The calculation of loss of information was introduced as an example as well as the set of simplifying assumptions in the system model. The application of presented analysis was also mentioned.

Keywords: information, fault indication, stochastic process, electromagnetic-mechanical system

DOI: 10.3233/JAE-2004-601

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 415-420, 2004

Authors: Taskaev, S.V. | Buchelnikov, V.D. | Vasil'EV, A.N. | Takagi, T.

Article Type: Research Article

Abstract: In this work the stress-temperature phase diagrams of a cubic ferromagnet with positive constant anisotropy and an external elastic stress along [001] axis are investigated.

Keywords: ferromagnet, phase transition, martensitic transformation, shape-memory effect

DOI: 10.3233/JAE-2004-602

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 421-425, 2004

Authors: Sebestyén, Imre | Pavo, József | Gyimóthy, Szabolcs | Bíró, Oszkár

Article Type: Research Article

Abstract: A method for the approximate prediction of the power loss of a nonlinear ferromagnetic laminated iron core is presented. The calculation is made in two subsequent steps. In the first step, the approximate magnetization of the material is predicted assuming a bulk nonlinear material with anisotropic electric conductivity. In the second step the nonlinear materials of the ferromagnetic sheets are replaced with linear ones whose permeability is spatially inhomogeneous. The actual permeability distributions are determined …based on the nonlinear B-H curve of the material and the magnetic field values obtained from the first calculation. In this paper the applicability of the method is demonstrated through calculations made by FEM studying a benchmark arrangement. Show more

Keywords: eddy current losses, laminated core, inhomogeneous permeability

DOI: 10.3233/JAE-2004-603

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 427-431, 2004

Authors: Matsutomo, Shinya | Noguchi, So | Yamashita, Hideo | Tanimoto, Shigeya

Article Type: Research Article

Abstract: Permanent magnet motors have been widely used. In recent years, from the point of view of energy saving, it is required to improve the efficiency of permanent magnet motors by applying an optimal design method. In this paper, we propose an adjusting technique of the supply voltage of permanent magnet motor when carrying out the optimal design by adopting voltage driven finite element method and genetic algorithm. In calculation for the optimal design, it is difficult …to keep a desirable balance of the supply voltage and the induced electromotive force. By using the proposed method, the supply voltage is appropriately decided to generate the rated torque. Owing to adopting this adjusting technique, the computation time for the optimal design can be reduced and the solution can escape from local minima because the needless computations can be drastically reduced. Show more

Keywords: finite element method, genetic algorithm, optimal design, permanent magnet motor

DOI: 10.3233/JAE-2004-604

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 433-436, 2004