NTRS - NASA Technical Reports Server

As of October 27, 2023, NASA STI Services will no longer have an embargo for accepted manuscripts. For more information visit NTRS News.

Back to Results
System characterization of a magnetically suspended flywheelThe purpose of flywheel energy storage is to provide a means to save energy during times when the satellite is in sunlight, and then return the energy during the time when the satellite is in darkness. Typically, an energy storage device operates cyclically, where for satellites in Low Earth Orbit (LEO) the typical period is 60 minutes of sunlight followed by 30 minutes of darkness. If a lifetime of 17 years is required the energy storage system must be capable of sustaining approximately 100,000 cycles. The recent developments at the University of Maryland and how these progressions apply to a 500 Watt-hour magnetically suspended flywheel stack energy storage system are covered. The work includes hardware testing results from a stack flywheel energy storage system, improvements in the area of non-contacting displacement transducers, and performance enhancements of magnetic bearings. The experimental results show that a stack flywheel energy storage system is a feasible technology.
Document ID
Document Type
Contractor Report (CR)
Kirk, James A.
(Maryland Univ. College Park, MD, United States)
Anand, Dave K.
(Maryland Univ. College Park, MD, United States)
Plant, David P.
(Maryland Univ. College Park, MD, United States)
Date Acquired
September 5, 2013
Publication Date
November 17, 1988
Subject Category
Mechanical Engineering
Report/Patent Number
NAS 1.26:183397
Accession Number
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.
No Preview Available