Development of 50kWh-class superconducting flywheel energy storage system

Author

Yamauchi, Yusuke ; Uchiyama, Nobuhito ; Suzuki, Eiji ; Kubota, Michiaki ; Fujii, Madoka ; Ohsaki, Hiroyuki

Author_Institution

Central Japan Railway Co., Aichi

fYear

2006

fDate

23-26 May 2006

Firstpage

484

Lastpage

486

Abstract

We report a development of 50 kWh-class flywheel energy storage system using a new type of axial bearing which is based on powerful magnetic force generated by a superconducting coil. This axial bearing can support a large mass. So, even at low rotational speeds, the flywheel system can have larger energy storage capacity by enlarging the mass of flywheel. Thus, this system does not require special materials that are mechanically strong enough against high circumferential velocity for the flywheel. A testing device was fabricated for evaluation of basic characteristics of the bearing. After the test with this device, a pilot system was fabricated for establishment of 50 kWh-class superconducting flywheel energy storage system technology

Keywords

flywheels; machine bearings; superconducting coils; 50 kWh; axial bearing; energy storage capacity; magnetic force; superconducting coil; superconducting flywheel energy storage system; Electromagnetic analysis; Electromagnetic forces; Energy storage; Flywheels; Magnetic analysis; Magnetic cores; Magnetic levitation; Magnetic sensors; Superconducting coils; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics, Electrical Drives, Automation and Motion, 2006. SPEEDAM 2006. International Symposium on

Conference_Location

Taormina

Print_ISBN

1-4244-0193-3

Type

conf

DOI

10.1109/SPEEDAM.2006.1649820

Filename

1649820