High-density permanent magnet machines

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Ikariga, Atsushi^{a; *} | Shimoji, Hiroyasu^a | Todaka, Takashi^a | Enokizono, Masato^a

Affiliations: [a] Faculty of Engineering, Oita University, 700 Dannoharu, Oita 870-1192, Japan

Correspondence: [*] Corresponding author. Tel./Fax: +81 97 554 7823; E-mail: ikariga@cc.oita-u.ac.jp

Abstract: This paper presents a novel permanent-magnet rotor for surface permanent magnet synchronous motors (SPMSM). In order to achieve larger power of SPMSM in limited volume as small as possible, use of a high-magnetic flux condition in designing is investigated. To generate higher magnetic flux density in the air-gap, a new segment type permanent-magnet rotor is proposed. The magnetic characteristics are analysed in detail with the 2-D finite element method, and the calculated results are compared with the experimental results of the prototype machine. The results show that the peak flux density is doubled and the back-EMF becomes a nearly sinusoidal waveform.

Keywords: SPMSM (surface permanent magnet synchronous motor), pole-oriented anisotropic magnet, Halbach

DOI: 10.3233/JAE-2007-836

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 19-23, 2007