Supply of rotational energy to a levitated magnet by applying alternating transverse magnetic field

Toshihiko Sugiura; Yoshitaka Matsuzaki

doi:10.1109/TASC.2005.849628

Supply of rotational energy to a levitated magnet by applying alternating transverse magnetic field

Toshihiko Sugiura, Yoshitaka Matsuzaki

Department of Mechanical Engineering

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

Abstract

This research investigates generation of spin torque acting on a permanent magnet, freely levitated above a high-T_c superconductor, under alternating transverse magnetic field. Numerical results of 6-d.o.f. motion show that the magnet increases its velocity of rotation around its cylindrical axis and finally obtains steady-state rotation. This velocity depends on the frequency of the input coil current. A simplified 2-d.o.f. system with only essential terms was introduced in order to discuss the mechanism of nonlinear coupling which generates spinning in alternating magnetic field. Experimental results were in good agreement with numerical ones. These results show possibility of supplying rotational energy to a levitating magnet by applying alternating magnetic field.

Original language	English
Pages (from-to)	2269-2272
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2 PART II
DOIs	https://doi.org/10.1109/TASC.2005.849628
Publication status	Published - 2005 Jun

Keywords

Electromagnetic forces
Nonlinear coupling
Rotor dynamics
Superconducting levitation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TASC.2005.849628

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abstract = "This research investigates generation of spin torque acting on a permanent magnet, freely levitated above a high-Tc superconductor, under alternating transverse magnetic field. Numerical results of 6-d.o.f. motion show that the magnet increases its velocity of rotation around its cylindrical axis and finally obtains steady-state rotation. This velocity depends on the frequency of the input coil current. A simplified 2-d.o.f. system with only essential terms was introduced in order to discuss the mechanism of nonlinear coupling which generates spinning in alternating magnetic field. Experimental results were in good agreement with numerical ones. These results show possibility of supplying rotational energy to a levitating magnet by applying alternating magnetic field.",

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AB - This research investigates generation of spin torque acting on a permanent magnet, freely levitated above a high-Tc superconductor, under alternating transverse magnetic field. Numerical results of 6-d.o.f. motion show that the magnet increases its velocity of rotation around its cylindrical axis and finally obtains steady-state rotation. This velocity depends on the frequency of the input coil current. A simplified 2-d.o.f. system with only essential terms was introduced in order to discuss the mechanism of nonlinear coupling which generates spinning in alternating magnetic field. Experimental results were in good agreement with numerical ones. These results show possibility of supplying rotational energy to a levitating magnet by applying alternating magnetic field.

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Supply of rotational energy to a levitated magnet by applying alternating transverse magnetic field

Abstract

Keywords

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