Electromagnetic Force and Torque in High- Tc Superconducting Levitation and Rotational Motion of its Levitated Body

Toshihiko Sugiura; Tsuyoshi Tanaka; Masashi Hibino; Masatsugu Yoshizawa

doi:10.1299/kikaic.66.1489

Electromagnetic Force and Torque in High- T_c Superconducting Levitation and Rotational Motion of its Levitated Body

Toshihiko Sugiura, Tsuyoshi Tanaka, Masashi Hibino, Masatsugu Yoshizawa

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

This research deals with evaluation of electromagnetic force and torque acting on a permanent magnet (PM) above a high-T_c superconductor (HTSC) and discusses dynamics of a spinning PM freely levitated above a HTSC. Force and torque were evaluated experimentally as functions of both displacement and tilting angle of the PM. Experimental results show that the force and torque acting on the PM are almost equivalent to ones acting on a rotor supported by an overhung shaft with a frictionless bearing. By theoretical analysis based on the above evaluation of the force and torque, dynamical behavior of a spinning PM was examined. Predicted whirling and precession of the PM were observed in experiments of rotation.

Original language	English
Pages (from-to)	1489-1494
Number of pages	6
Journal	Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume	66
Issue number	645
DOIs	https://doi.org/10.1299/kikaic.66.1489
Publication status	Published - 2000

Keywords

Critical Speed
Eccentricity
High- Tc Superconductor
Magnetic Stiffness
Precession
Superconducting Bearing
Whirl

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

Access to Document

10.1299/kikaic.66.1489

Cite this

Electromagnetic Force and Torque in High- T_c Superconducting Levitation and Rotational Motion of its Levitated Body. / Sugiura, Toshihiko; Tanaka, Tsuyoshi; Hibino, Masashi et al.
In: Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, Vol. 66, No. 645, 2000, p. 1489-1494.

Research output: Contribution to journal › Article › peer-review

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