Safety system for flywheel system for mobile energy storage
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United States of America Patent
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-
Nov 7, 2000
Issued Date -
N/A
app pub date -
Aug 4, 1997
filing date -
Nov 8, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flywheel safety support system isolates the flywheel and its motor-generator from the driving environment of an electrically powered motor vehicle. A suitable liquid, placed between the outer and vacuum housings of the flywheel assembly, provides buoyancy and damping to the vacuum housing, cooling of the motor-generator, and serves as one of the barriers to rotor energy and angular momentum transfer in the event of an accident or failure. During normal operation, a shearable mechanical gimbal system keeps the vacuum housing centered in the outer housing, reacts the spin moments generated by the motor-generator, and provides a path for the electrical leads into the vacuum housing. In the event of bearing seizure or rotor failure, the mechanical gimbal will shear and allow the vacuum housing to gradually spin down against the fluid. A fiber barrier provides an additional layer of protection to passengers.
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