Keywords
the Helmholtz wave equation
FEM-analysis
high-speed electrical machine втрати від вихрових струмів
хвильове рівняння Гельмгольца
FEM-аналіз
високошвидкісна електрична машина
How to Cite
Abstract
An analytical solution of the Helmholtz equation for a conducting half-space in two-dimensional formulation is presented. The received spatial distribution of the magnetic vector potential is used for calculation of the current density and acquisition of dependencies, which allow to calculate the eddy current losses in the salient-pole rotor with exterior arrangement of permanent magnets. Two-dimensional FEM-model salient pole electrical machine with permanent magnet excitation was used to verify these results. The versions of calculating losses in the rotor for machines with halfclosed and open slots on the stator are compared. Reasonable accuracy of the offered analytical method is showed. The inexpediency of using open stator slots in high-speed machines with permanent magnets is confirmed, the recommendations about the choice of the type of stator windings are made. References 10, figures 5.
References
Aglen O. Loss calculation and thermal analysis of a high-speed generator // Proc. of IEMDC. – 2003. – Pp. 1117-1125.
Amara, Yacine, Pascal Reghem, and Georges Barakat. Analytical prediction of eddy-current loss in armature windings of permanent magnet brushless AC machines // Magnetics. IEEE Transactions on 46.8 – 2010. – Pp. 3481-3484.
Dajaku, Gurakuq, and Dieter Gerling. Eddy current loss minimization in rotor magnets of PM machines using highefficiency 12-teeth/10-slots winding topology // International Conference on. IEEE "Electrical Machines and Systems" (ICEMS), 2011.
Gieras J.F., Wang G.R., Kamper M.J. Axial Flux Permanent Magnet Brushless Machine. – Kluwer Academic Publishers, 2004. – 340 p.
Han, Seok-Hee, Thomas M. Jahns, and Z. Q. Zhu. Analysis of rotor core eddy-current losses in interior permanentmagnet synchronous machines // Industry Applications, IEEE Transactions on 46.1. – 2010. – Pp. 196-205.
Li, Jian, et al. Effects of MMF harmonics on rotor eddy-current losses for inner-rotor fractional slot axial flux permanent magnet synchronous machines // Magnetics, IEEE Transactions on 48.2. – 2012. – Pp. 839-842.
Makarchuk A. Eddy currents losses in a rotor of the high-speed generator with the permanent magnet excitation // Tekhnichna Elektrodynamika. – 2013. – No 1. – Pp. 56–61. (Ukr)
Niu, Shuangxia, K. T. Chau, and J. Z. Jiang. Analysis of eddy-current loss in a double-stator cup-rotor PM machine // Magnetics, IEEE Transactions on 44.11. – 2008. – Pp. 4401-4404.
Wang, Jiabin, et al. Rotor eddy-current loss in permanent-magnet brushless AC machines // Magnetics, IEEE Transactions on 46.7. – 2010. – Pp. 2701-2707.
Yamazaki, Katsumi, and Yu Fukushima. Effect of eddy-current loss reduction by magnet segmentation in synchronous motors with concentrated windings // Industry Applications, IEEE Transactions on 47.2. – 2011. – Pp. 779-788.
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