A new bearing structure for a single-axis controlled repulsive type magnetic bearing with motor function

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

Article type: Research Article

Authors: Ohji, Takahisa^{a; *} | Sugiura, Ken^a | Amei, Kenji^a | Sakui, Masaaki^a

Affiliations: [a] Graduate School of Science and Engineering for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan

Correspondence: [*] Corresponding author. Tel.: +81 0 76 6983; Fax: +81 0 76 445 6983; E-mail: ohji@eng.u-toyama.ac.jp

Abstract: This paper reports novel magnetic bearing structures with the function of a bearingless motor (BeLM) and a repulsive type magnetic bearing (RTMB). The structures consist of circular arc permanent magnets for field poles and cylindrical permanent magnets for magnetic bearings. Two types of permanent magnet configurations suitable for an ultra high-speed motor are proposed in this paper. From measurement results of magnetic flux density distributions, it was verified that a magnetic pole composition using Halbach array leads to good coexistence of both BeLM and RTMB.

Keywords: Magnetic bearing, permanent magnet, bearing less motor, repulsive type magnetic bearing

DOI: 10.3233/JAE-2007-879

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 49-53, 2007