Self-Bearing Motor-Generator for Flywheels, Phase I

Metadata Updated: May 2, 2019

Self-bearing or ?bearingless? motors perform both motor and bearing support functions but such devices have not yet achieved speeds above 15,000 rpm. The innovation proposed for a self-bearing motor-generator (M-G) will achieve speeds above 30,000 rpm, moving the technology to a new frontier, not only for the motor but the generator functions as well. As applied to a flywheel energy storage system (FESS), the concept replaces the permanent-magnet bearings, conventional M-G, as well as the need for the active damper. The self-bearing function is implemented with a proportional integral derivative control and has adjustable damping as in conventional active magnetic bearings. As a result, the flywheel end rotors are shortened substantially and could enable running at much higher speed without concerns regarding the first bending critical speed. Further, elimination of rotor parts will enhance the reliability of the mechanical system. Although a self-bearing approach could result in a less efficient magnetic bearing combined with a less efficient motor, the proposed approach will solve the efficiency problem, making it ideal for the high energy efficiencies required for FESS. With such improved efficiencies and reliability, the self-bearing M-G will serve as a modular building-block technology for the power management and distribution systems used in observation platforms for earth science missions.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_5395
Maintainer Email
Public Access Level public
Bureau Code 026:00
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Metadata Catalog ID
Schema Version
Catalog Describedby
Datagov Dedupe Retained 20190501230127
Harvest Object Id 6f714bda-7257-469b-9d81-1fd677390c24
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2004-07-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash c953bbfc96ee5b484cc3bdfe85d7faaa41ff6a38
Source Schema Version 1.1

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