A new analytical approach to determine slotting based eddy current losses in permanent magnets of PMSM taking into account axial and circumferential segmentation

Author:

Bode Cornelius,Canders Wolf-Rüdiger,Henke Markus

Abstract

Purpose – The purpose of this paper is to calculate slotting-based eddy currents in permanent magnet excited synchronous machine (PMSM) taking into account axial and circumferential segmentation of magnets. Design/methodology/approach – An analytical approach to calculate eddy current losses in PM caused by slotting harmonics of PMSM is presented. The eddy current reaction field is taken into account as well as axial and circumferential segmentation of the magnets. Findings – The analytical model provides results comparable to 3D-FEM calculations even at high frequencies at reduced computation costs. To generalize the results the magnetic Reynold’s number is introduced. Originality/value – Taking into account the axial and circumferential segmentation in the PDE; the approach is much more accurate compared to known approaches; accuracy is comparable to 3D-FEA.

Publisher

Emerald

Subject

Applied Mathematics,Electrical and Electronic Engineering,Computational Theory and Mathematics,Computer Science Applications

Reference10 articles.

1. Bode, C. and Canders, W.-R. (2010), “Advanced calculation of eddy current losses in PMSM with tooth windings”, 2010 XIX International Conference on Electrical Machines (ICEM), IEEE, Rome, pp. 1-6.

2. Bode, C. , May, H. and Canders, W.-R. (2011a), “New topology for high force linear actuator with tooth windings”, Paper No. PS I-11, Proc. International Symposium on Linear Drives for Industry Applications, LDIA11, Eindhoven, July 3-6.

3. Bode, C. , May, H. and Canders, W.-R. (2011b), “Optimized reduction of parasitic eddy current losses in high speed permanent magnet motors based on 2D and 3D field calculations”, Paper PS i 1.6, Proc. XV International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering, Funchal (Madeira), September 1-3.

4. Boules, N. (1981), “Impact of slot harmonics on losses of high-speed permanent magnet machines with a magnet retaining ring”, Electric Machines and Electromechanics , Vol. 6 No. 6, pp. 527-539.

5. Mirzaei, M. , Binder, A. , Funieru, B. and Susic, M. (2012), “Analytical calculations of induced eddy current losses in the magnets of surface mounted PM machines with consideration of circumferential and axial segmentation effects”, IEEE Transactions on Magnetics , Vol. 48 No. 12, pp. 4831-4841.

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