A levitated motor with superconducting magnetic bearings assisted by self-sensing AMBs

Author

Komori, Mochimitsu ; Shiraishi, Chaki

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

2189

Lastpage

2192

Abstract

This paper describes newly developed superconducting magnetic bearings (SMBs) assisted by self-sensing active magnetic bearings (AMBs). The self-sensing AMBs detect the gaps between rotor and electromagnets. The principle of the self-sensing sensors is based on a differential transformer. The sensitivity in liquid nitrogen is almost equal to that in air. The sensor is found to be useful in liquid nitrogen at 77 K (-196 °C). Moreover, the sensors are applied to the SMBs. Dynamics of the SMBs with self-sensing AMBs are discussed. From the results, it is found that the system is useful and promising.

Keywords

differential transformers; machine bearings; magnetic bearings; magnetic levitation; superconducting magnets; 77 K; differential transformer; displacement sensor; hybrid magnetic bearing; levitated motor; self-sensing active magnetic bearing; superconducting magnetic bearing; Circuits; Electromagnets; Magnetic levitation; Magnetic sensors; Nitrogen; Permanent magnet motors; Rotors; Superconducting magnets; Superconductivity; Temperature sensors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.813031

Filename

1212053