Title :
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
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;
Conference_Titel :
Power Electronics, Electrical Drives, Automation and Motion, 2006. SPEEDAM 2006. International Symposium on
Conference_Location :
Taormina
Print_ISBN :
1-4244-0193-3
DOI :
10.1109/SPEEDAM.2006.1649820
