Damping in high-temperature superconducting levitation systems
Abstract
Methods and apparatuses for improved damping in high-temperature superconducting levitation systems are disclosed. A superconducting element (e.g., a stator) generating a magnetic field and a magnet (e.g. a rotor) supported by the magnetic field are provided such that the superconducting element is supported relative to a ground state with damped motion substantially perpendicular to the support of the magnetic field on the magnet. Applying this, a cryostat housing the superconducting bearing may be coupled to the ground state with high damping but low radial stiffness, such that its resonant frequency is less than that of the superconducting bearing. The damping of the cryostat may be substantially transferred to the levitated magnetic rotor, thus, providing damping without affecting the rotational loss, as can be derived applying coupled harmonic oscillator theory in rotor dynamics. Thus, damping can be provided to a levitated object, without substantially affecting the rotational loss.
- Inventors:
- Issue Date:
- Research Org.:
- The Boeing Company, Chicago, IL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1176201
- Patent Number(s):
- 7633202
- Application Number:
- 11/745,376
- Assignee:
- The Boeing Company (Chicago, IL)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16C - SHAFTS
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
- DOE Contract Number:
- FC36-99GO10285
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2007 May 07
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Hull, John R. Damping in high-temperature superconducting levitation systems. United States: N. p., 2009.
Web.
Hull, John R. Damping in high-temperature superconducting levitation systems. United States.
Hull, John R. Tue .
"Damping in high-temperature superconducting levitation systems". United States. https://www.osti.gov/servlets/purl/1176201.
@article{osti_1176201,
title = {Damping in high-temperature superconducting levitation systems},
author = {Hull, John R.},
abstractNote = {Methods and apparatuses for improved damping in high-temperature superconducting levitation systems are disclosed. A superconducting element (e.g., a stator) generating a magnetic field and a magnet (e.g. a rotor) supported by the magnetic field are provided such that the superconducting element is supported relative to a ground state with damped motion substantially perpendicular to the support of the magnetic field on the magnet. Applying this, a cryostat housing the superconducting bearing may be coupled to the ground state with high damping but low radial stiffness, such that its resonant frequency is less than that of the superconducting bearing. The damping of the cryostat may be substantially transferred to the levitated magnetic rotor, thus, providing damping without affecting the rotational loss, as can be derived applying coupled harmonic oscillator theory in rotor dynamics. Thus, damping can be provided to a levitated object, without substantially affecting the rotational loss.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 15 00:00:00 EST 2009},
month = {Tue Dec 15 00:00:00 EST 2009}
}