A measurement of rotation loss characteristics of high-Tc superconducting magnetic bearings and active magnetic bearings

Author

Kameno, H. ; Miyagawa, Y. ; Takahata, R. ; Ueyama, H.

Author_Institution

R&D Center, Koyo Seiko Co. Ltd., Osaka, Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

972

Lastpage

975

Abstract

As the demand for electric power has been increasing steadily, the introduction of a flywheel energy storage system (FESS) using a superconducting magnetic bearing (SMB) is needed to level daily load as much as possible (daily load-leveling). We have studied rotation loss characteristics of SMBs with high Tc superconductors (YBCO) and permanent magnets (PM) for supporting a flywheel in FESS. We have designed and manufactured a testing machine for measuring rotation loss characteristics of SMBs. The rotor is suspended by two sets of radial active magnetic bearings (RaAMBs), a set of axial active magnetic bearings (AxAMB) and a set of SMB. Then, we obtained rotation loss characteristics of the rotor levitated by RaAMBs, AxAMB and SMB on this testing machine.

Keywords

flywheels; high-temperature superconductors; loss measurement; magnetic bearings; magnetic levitation; rotors; superconducting devices; YBaCuO; active magnetic bearings; axial active magnetic bearings; daily load-leveling; flywheel energy storage system; high-Tc superconducting magnetic bearings; magnetic levitation; radial active magnetic bearings; rotation loss characteristics; rotation loss characteristics measurement; rotor; superconducting magnetic bearing; testing machine; Energy storage; Flywheels; High temperature superconductors; Loss measurement; Magnetic levitation; Permanent magnets; Rotation measurement; Superconducting magnets; Testing; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783460

Filename

783460