Analysis of Effects of Magnetic Slot Wedges on Characteristics of Permanent Magnet Synchronous Machine

Authors: B. Ladghem Chikouche

Abstract:

The influence of slot wedges permeability on the electromagnetic performance of three-phase permanent magnet synchronous machine is investigated in this paper. It is shown that the back-EMF waveform, electromagnetic torque and electromagnetic torque ripple are all significantly affected by slot wedges permeability. The paper presents an accurate analytical subdomain model and confirmed by finite-element analyses.

Keywords: Exact analytical calculation, finite-element method, magnetic field distribution, permanent magnet machines performance, stator slot wedges permeability.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1124047

References:

[1] H. Mikami, K. Ide, K. Arai, M. Takahashi, and K. Kajiwara, “Dynamic harmonic field analysis of a cage type induction motor when magnetic slot wedges are applied,” IEEE Trans. Energy Convers., Vol. 12, no. 4, pp. 337–343, Apr. 1997.
[2] R.A. Hanna, W. Hiscock, and P. Klinowski, “Failure analysis of three slow-speed induction motors for reciprocating load application,” IEEE Trans. on Ind. Appl., Vol. 43, no. 2, pp. 429-435, Mar./Apr. 2007.
[3] R.: Li, H, "Improvements in energy efficiency of induction motors by the use of magnetic wedges," Petroleum and Chemical Industry Conference (PCIC), 2011 Record of Conference Papers Industry Applications Society 58th Annual IEEE, vol., no., pp. I-6, 19-21 Sept 2011.
[4] A. Tessarolo. A, F. Luise, M. Bortolozzi, M. Mezzarobba, “New Magnetic Wedge Design for Enhancing the Performance of Open-Slot Electric Machines,” IEEE Conference Publications in Electrical Systems for Aircraft, Railway and Ship Propulsion (ESARS), 2012
[5] S. Wang, Z. Zhao, L. Yuan, B. Wang, “Investigation and Analysis of the Influence of Magnetic Wedges on High Voltage Motors Performance,” IEEE Vehicle Power and Propulsion Conference (VPPC), September 3-5, 2008, Harbin, China.
[6] G. D. Donato, F. G. Capponi and F. Caricchi, “On the Use of Magnetic Wedges in Axial Flux Permanent Magnet Machines,” IEEE Trans. on Ind. Elect, Vol. 60, no. 11, November 2013.
[7] M. Dems, K. Komęza, J. K. Sykulski, “Analysis of effects of magnetic slot wedges on characteristics of large induction motor,” In Proceedings of the 15th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering (ISEF '11), Funchal, Portugal, September 2011.