Development of magnetic levitation synchronous motor with high-Tc superconducting bearing

Issue title: Selected Papers from the 15th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2011)

Article type: Research Article

Authors: Murakami, Iwanori^{a; *} | Kobayashi, Yusuke^a | Gyoda, Masashi^a | Ando, Yoshinori^a | Yamada, Kou^a

Affiliations: [a] Department of Mechanical System Engineering, Gunma University, Kiryu, Japan

Correspondence: [*] Corresponding author: Iwanori Murakami, Department of Mechanical System Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, 376-8515, Japan. Tel.: +81 0277 30 1564; E-mail: murakami@gunma-u.ac.jp

Abstract: In this study, we propose a new magnetic levitation synchronous motor with a high-Tc superconducting bearing. The levitation rotor obtains the levitation force by the magnetic attraction and the restoring force (axially and radially to the shaft) from a superconducting bearing. The levitation rotor to which the magnetic flux concentration method is applied has a large magnetic field outside of the rotor. Because the superconducting bearing constrains this concentrated magnetic flux, the rotor obtains a large restoring force. In addition, a superconducting bearing with a small bulk can be realized. We stabilized the rotor using this method and confirmed that this motor passed the resonance and that its speed increased to approximately 3500 [rpm] without control.

Keywords: Synchronous motor, magnetic levitation, superconducting bearing

DOI: 10.3233/JAE-2012-1448

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 97-103, 2012