International Journal of Applied Electromagnetics and Mechanics - Volume 46, issue 2

Authors: Di Barba, Paolo | Wiak, Słwomir

Article Type: Editorial

Abstract: Preface to the Selected Papers from ISEF-2013 special issue.

DOI: 10.3233/JAE-141940

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 325-325, 2014

Authors: Cvetkovski, Goga | Petkovska, Lidija

Article Type: Research Article

Abstract: The minimization of the torque ripple in permanent magnet synchronous motors (PMSM) is generally achieved by a special motor design which in the design process involves a variation of many geometrical motor parameters. In this paper a new approach is introduced where genetic algorithm is used as an optimization tool where the maximum value of the cogging torque is used as an objective function. Therefore a proper mathematical presentation of the cogging torque for the analyzed …synchronous motor is developed. Finally the initial motor and the optimized motor model are modeled in FEMM software which is based on finite element method. The cogging torque is analytically and numerically calculated and the results for both models are presented. Show more

Keywords: Permanent magnet synchronous motor, optimization, genetic algorithm, cogging torque, finite element method

DOI: 10.3233/JAE-141941

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 327-334, 2014

Authors: Di Barba, P. | Savini, A. | Wiak, S.

Article Type: Research Article

Abstract: Optimizing against sensitivity is a major issue in optimal design of electromagnetic devices. In the paper, the optimal shape design problem against sensitivity is formulated in terms of Paretian optimality, trading off design criterion and sensitivity with respect to large-scale variations in the design space; a cost-effective evaluation of sensitivity, based on evolutionary computing, is proposed. The design optimization of a magnetic MEMS is considered as the case study.

Keywords: MEMS, optimal design, evolutionary computing, finite-element analysis

DOI: 10.3233/JAE-141942

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 335-340, 2014

Authors: Dular, Patrick | Péron, Victor | Krähenbühl, Laurent | Geuzaine, Christophe

Article Type: Research Article

Abstract: The modeling of eddy currents in conductors is split into a sequence of progressive finite element subproblems. The source fields generated by the inductors alone are calculated at first via either the Biot-Savart law or finite elements. The associated reaction fields for each added conductive region, and in return for the source regions themselves when massive, are then calculated with finite element models, possibly with initial perfect conductor and/or impedance boundary conditions to be further corrected. …The resulting subproblem method allows efficient solving of parameterized analyses thanks to a proper mesh for each subproblem and the reuse of previous solutions to be locally corrected. Show more

Keywords: Eddy currents, finite element method (FEM), skin and proximity effects, subdomain method

DOI: 10.3233/JAE-141943

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 341-348, 2014

Authors: Hihat, N. | Lecointe, J.-Ph. | Ninet, O. | Duchesne, S. | Napieralska, E. | Wiak, S.

Article Type: Research Article

Abstract: This paper presents the normal permeability μ_z of different grades of electrical sheets (Grain oriented, non oriented and amorphous). A specific test bench allows determining the intrinsic static B(H) cycle. The magnetization in static mode makes it possible to suppress the eddy current influence, contrary to others classical methods. The B–H curves of different materials are provided up to the saturation and the μ_z permeability can be directly …implemented in Finite Element software applications. Show more

Keywords: Normal magnetic characterization, static characterization, soft materials

DOI: 10.3233/JAE-141944

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 349-354, 2014

Authors: Ibrahim, Mohammad | Bernard, Laurent | Pichon, Lionel | Razek, Adel

Article Type: Research Article

Abstract: A wireless charging system for electric vehicle (EV) is considered. A 3D Finite Element (FE) model of the inductive coupler is developed in order to compute the inductances and the radiated magnetic field around the system. In addition, a circuit model associated to field computation allows determining the electric behavior of the system during charging. Simulation results are then validated by comparison with experimental measurements. The developed model allows the design of the system considering the …optimization of the energy transfer and the radiated electromagnetic compatibility (EMC) compliance. Show more

Keywords: Inductive charging, FEM, EMC radiation

DOI: 10.3233/JAE-141945

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 355-360, 2014

Authors: Januszkiewicz, Łukasz | Hausman, Sławomir | Nowak, Iwona | Krucińska, Izabella

Article Type: Research Article

Abstract: In the paper a textile Vee antenna made through physical vapor deposition of metal on textile material is presented. It can accomplish a wider frequency bandwidth than that of the original Vee antenna made with the embroidering technique. Dependence of both impedance and radiation patterns of the antenna on various values of the technology parameters is investigated. The radiation pattern is examined both for free space and on-body locations.

Keywords: Textile antenna, wearable electronics, physical vapour deposition

DOI: 10.3233/JAE-141946

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 361-365, 2014

Authors: Jedryczka, Cezary | Wojciechowski, Rafal M. | Demenko, Andrzej

Article Type: Research Article

Abstract: The paper focuses on the analysis of the asynchronous torque of the line start permanent magnet synchronous motor (LSPMSM) with the asymmetrical squirrel cage winding. In order to calculate the asynchronous torque the parametrical field-circuit models of LSPMSM have been elaborated on. Further, the models have been applied to investigate the impact of squirrel cage asymmetry on the asynchronous torque. The evaluated asynchronous torque vs. rotor speed characteristic of proposed motor with asymmetrical cage has been …compared with the characteristics of reference asynchronous motor and LSPMSM with symmetrical cage winding. It has been found that deepening of chosen bars of the cage improves the starting properties of the LSPMSM. Show more

Keywords: Line start permanent magnet synchronous motor, FEM, torque analysis, starting characteristic

DOI: 10.3233/JAE-141947

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 367-373, 2014

Authors: Komeza, K. | Lefik, M. | López-Fernández, X.M.

Article Type: Research Article

Abstract: The paper describes calculations method of heat transfer coefficient for finned induction motor housing and equivalent thermal conductivity for air zones inside this housing. The method is based on Computational Fluid Dynamics (CFD). In addition, the results of thermal calculations to verify calculated values of coefficient are presented.

DOI: 10.3233/JAE-141948

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 375-380, 2014

Authors: Okamoto, Yoshifumi | Tominaga, Yusuke | Wakao, Shinji | Sato, Shuji

Article Type: Research Article

Abstract: This study derives a high performance flux barrier for an interior permanent magnet (IPM) motor using binary-based topology optimization (TO). TO has a higher degree of optimization than size or shape optimization. An IPM motor has many design parameters including the current phase angle, core shape of rotor and stator, and magnet position and shape. The flux barrier in an IPM motor plays a particularly important role, influencing several characteristics. We apply TO, using a multistep …genetic algorithm, to the rotor core in order to determine a flux barrier with the highest torque performance. Show more

Keywords: Flux barrier, genetic algorithm, IPM motor, multistep procedure, topology optimization

DOI: 10.3233/JAE-141949

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 46, no. 2, pp. 381-387, 2014