National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

DE2008918580

Publication Date	2007
Personal Author	Strasik, M.; Johnson, P. E.; Day, A. C.; Mittleider, J.; Higgins, M. D.
Page Count	29
Abstract	The summaries of this project are: (1) Program goal is to design, develop, and demonstrate a 100 kW UPS flywheel electricity system; (2) flywheel system spin tested up to 15,000 RPM in a sensorless, closed loop mode; (3) testing identified a manufacturing deficiency in the motor stator--overheats at high speed, limiting maximum power capability; (4) successfully spin tested direct cooled HTS bearing up to 14,500 RPM (limited by Eddy current clutch set-up); (5) Testing confirmed commercial feasibility of this bearing design--Eddy Current losses are within acceptable limits; and (6) Boeing's investment in flywheel test facilities increased the spin-test capabilities to one of the highest in the nation.
Keywords	Energy storage Flywheels Magnetic bearings Design Eddy currents Electricity Fabrication Manufacturing Motors Spin Test facilities Testing Velocity
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Cambridge Univ. (England).; Department of Energy, Washington, DC.; Sandia National Labs., Albuquerque, NM.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC. and Sandia National Labs., Albuquerque, NM.
Document Type	Technical Report
NTIS Issue Number	200905
Contract Number	DE-FC36-99G010825

Design, Fabrication, and Test of a 5-kWh/100-kW Flywheel Engery Storage Utilizing a High-Temperature Superconducting Bearing.

Design, Fabrication, and Test of a 5-kWh/100-kW Flywheel Engery Storage Utilizing a High-Temperature Superconducting Bearing.
DE2008918580

Publication Date	2007
Personal Author	Strasik, M.; Johnson, P. E.; Day, A. C.; Mittleider, J.; Higgins, M. D.
Page Count	29
Abstract	The summaries of this project are: (1) Program goal is to design, develop, and demonstrate a 100 kW UPS flywheel electricity system; (2) flywheel system spin tested up to 15,000 RPM in a sensorless, closed loop mode; (3) testing identified a manufacturing deficiency in the motor stator--overheats at high speed, limiting maximum power capability; (4) successfully spin tested direct cooled HTS bearing up to 14,500 RPM (limited by Eddy current clutch set-up); (5) Testing confirmed commercial feasibility of this bearing design--Eddy Current losses are within acceptable limits; and (6) Boeing's investment in flywheel test facilities increased the spin-test capabilities to one of the highest in the nation.
Keywords	Energy storage Flywheels Magnetic bearings Design Eddy currents Electricity Fabrication Manufacturing Motors Spin Test facilities Testing Velocity
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Cambridge Univ. (England).; Department of Energy, Washington, DC.; Sandia National Labs., Albuquerque, NM.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC. and Sandia National Labs., Albuquerque, NM.
Document Type	Technical Report
NTIS Issue Number	200905
Contract Number	DE-FC36-99G010825