A new driving method for superconducting levitated stepping motor

Author

Komori, Mochimitsu ; Nomura, Shin-Ichiro

Author_Institution

Dept. of Mech. Syst. Eng., Kyushu Inst. of Technol., Fukuoka, Japan

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

2243

Lastpage

2246

Abstract

A magnetically levitated stepping motor using high T_c superconductor has been studied. The levitated stepping motor consists of a cylindrical rotor with superconductors and a stator with eight electromagnets. The rotor measures 10 mm in diameter, 46 mm in length, and 18 g in mass. The superconductors of the rotor are field-cooled in liquid nitrogen with various field-cooling currents. The levitated rotor is driven by an four-phase excitation with various driving currents. The rotation angle by each step is 45 deg. The rotor spins for every step as the excitation phase shifts. This paper discusses the dynamics of the motor driven by a new driving method.

Keywords

high-temperature superconductors; magnetic flux; magnetic levitation; motor drives; stepping motors; superconducting machines; torque; 18 g; 46 mm; 5 mm; cylindrical rotor; electromagnets; field-cooled rotor superconductors; four-phase excitation; high T_c superconductor; levitated rotor; liquid nitrogen cooling; magnetically levitated stepping motor; motor dynamics; stator; superconducting levitated stepping motor; Electromagnetic measurements; Electromagnets; Length measurement; Magnetic field measurement; Magnetic levitation; Microcomputers; Permanent magnet motors; Rotors; Stators; Superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.813056

Filename

1212066