A flywheel is described having a rotor constructed of wire wound onto a central form. The wire is prestressed, thus mitigating stresses that occur during operation. In another aspect, the flywheel incorporates a low-loss motor using electrically non-conducting permanent magnets.
GOVERNMENT RIGHTS LEGEND
This invention was made with government support from the U.S. Department of Energy, managed by the National Energy Technology Laboratory, under contract ID: OE-0000232. The government has certain rights in the invention.