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  • MACHINERY  (3)
  • ENERGY PRODUCTION AND CONVERSION  (1)
  • Inorganic Chemistry
  • MACHINE ELEMENTS AND PROCESSES
  • 1985-1989  (4)
  • 1
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    Long-Life Cryogenic Cooler (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Magnetic bearings and noncontacting seals let cooler operate unattended at 65 K for more than 3 years. New cooler uses magnetic bearings, small piston/cylinder clearance seals, and linear motors. Cooler consists of compression and expansion sections connected end-to-end. Compression section houses reciprocating hollow piston driven by linear motor.
    Keywords: MACHINERY
    Type: GSC-12697 , NASA Tech Briefs (ISSN 0145-319X); 9; 1; P. 140
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Design of a motor-generator for an energy storage flywheel (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The paper examines motor/generator designs in which the rotor is integrated into the flywheel. Rotational loss considerations tend to dominate the design tradeoffs to maintain high system storage efficiency with a directly coupled unit. Some of the design alternatives are described as a guide to the experimental and analytical program needed to finalize a design.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: 1988 IECEC; Jul 31, 1988 - Aug 05, 1988; Denver, CO; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Magnetic Bearing With Radial and Angular Control (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Active magnetic bearing stably levitates rotor against radial (lateral) and axial motion and points rotor axis in controllable direction, yet allows rotor to turn freely about own axis. Rotor only moving part, and absence of mechanical contact between rotor and stator assures long life. Active magnetic bearing includes electromagnet coils tilting rotor clockwise or counterclockwise, or move it right or left. Feedback control system maintains rotor at equilibrium radial and angular positions in response to signals from position sensors. No active control needed to maintain equilibrium axial position. Adjustable magnetic bearing useful in high-speed rotating devices, robotic joints, and supports for optical elements.
    Keywords: MACHINERY
    Type: GSC-12957 , NASA Tech Briefs (ISSN 0145-319X); 11; 3; P. 62
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 4
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    Three-Axis Attitude Control With a Single Wheel (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Single-device attitude-control system provides stabilization along three axes. Flywheel connected to electronically controlled motor rotates on magnetic bearing. At high rotational speed, small angular displacements about x and y axes, in response to control signals enable storage of relatively large amounts of angular momentum. Angular momentum about z axis stored in changes in rotational speed.
    Keywords: MACHINERY
    Type: GSC-12970 , NASA Tech Briefs (ISSN 0145-319X); 11; 3; P. 63
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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