Hubless Flywheel with Null-E Magnetic Bearings, Phase I

Metadata Updated: November 12, 2020

For space-born energy storage systems, the energy to weight ratio is extremely important. From this perspective, a hubless flywheel energy storage design is very advantageous since most of the flywheel energy is stored in its outer circumference, while the core significantly adds to the system weight. One of the problems with this design is that conventional active magnetic bearings are difficult to integrate into the overall system. We propose to utilize recently developed Null-E Magnetic Bearings instead, which appear to be better suited for the hubless topology. Their major advantages over active magnetic bearings include inherent stability at high rotational speeds, simplicity, low cost and lack of laminated components. At the same time, Null-E bearings deliver the desired combination of high load capacity, stiffness and low rotational losses. They can be designed to operate as entirely passive systems with no electronics or external power supplies, or as partially active systems, with some supplementary electronics. A combination of different modes is also possible, e.g. an active system at low speeds and passive at high. The proposed study includes electromagnetic design and analysis of Null-E bearings as well as research of composite material technologies suitable for the proposed design.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_9965
Data First Published 2005-01-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash aef309765416fb775e7b0116b8c9b2eb69462284
Source Schema Version 1.1

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