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Title: Rotor instrumentation study for high-temperature superconducting generators

Abstract

In FY 9195, ORNL carried out work on rotor instrumentation systems in support of the General Electric (GE) Superconductivity Partnership Initiative (SPI) on Superconducting Generator Development. The objective was to develop a system for tramsitting data from sensors in the spinning rotor to a stationary data acquisition system. Previous work at ORNL had investigated an optical method of cryogenic temperature measurement using laser-induced fluorescence in certain phosphors. Later follow-up discussions with experts in the ORNL Engineering Technology Division indicated that this method could also be extended to measure strain and magnetic field. Another optical alternative using standard fiber optic transmission modules was also investigated. The equipment is very inexpensive, but needs to be adapted for operation in a high-g-force rotating environment. An optical analog of a commutator or slip ring also needs to be developed to couple the light signals from the rotor to the stationary frame. Sealed mercury-film rotary contacts are manufactured by Meridian Laboratory. Unlike conventional slipring assemblies, these offer low noise and long lifetime, with low costs per channel. Standard units may need some upgrading for 3600-rpm or high-voltage operation. A commercial electronic telemetry system offered by Wireless Data Corporation (WDC) was identified as a viable candidate,more » and information on this system was presented to GE. GE has since ordered two of these systems from WDC for temperature measurements in their rotating test cryostat.« less

Authors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
366459
Report Number(s):
ORNL/TM-13229
ON: DE96014522; TRN: 96:005170
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jun 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; ROTORS; TEMPERATURE MEASUREMENT; SUPERCONDUCTING GENERATORS; FLUORESCENCE SPECTROSCOPY; DESIGN; HIGH-TC SUPERCONDUCTORS

Citation Formats

Schwenterly, S W, and Wilson, C T. Rotor instrumentation study for high-temperature superconducting generators. United States: N. p., 1996. Web. doi:10.2172/366459.
Schwenterly, S W, & Wilson, C T. Rotor instrumentation study for high-temperature superconducting generators. United States. https://doi.org/10.2172/366459
Schwenterly, S W, and Wilson, C T. 1996. "Rotor instrumentation study for high-temperature superconducting generators". United States. https://doi.org/10.2172/366459. https://www.osti.gov/servlets/purl/366459.
@article{osti_366459,
title = {Rotor instrumentation study for high-temperature superconducting generators},
author = {Schwenterly, S W and Wilson, C T},
abstractNote = {In FY 9195, ORNL carried out work on rotor instrumentation systems in support of the General Electric (GE) Superconductivity Partnership Initiative (SPI) on Superconducting Generator Development. The objective was to develop a system for tramsitting data from sensors in the spinning rotor to a stationary data acquisition system. Previous work at ORNL had investigated an optical method of cryogenic temperature measurement using laser-induced fluorescence in certain phosphors. Later follow-up discussions with experts in the ORNL Engineering Technology Division indicated that this method could also be extended to measure strain and magnetic field. Another optical alternative using standard fiber optic transmission modules was also investigated. The equipment is very inexpensive, but needs to be adapted for operation in a high-g-force rotating environment. An optical analog of a commutator or slip ring also needs to be developed to couple the light signals from the rotor to the stationary frame. Sealed mercury-film rotary contacts are manufactured by Meridian Laboratory. Unlike conventional slipring assemblies, these offer low noise and long lifetime, with low costs per channel. Standard units may need some upgrading for 3600-rpm or high-voltage operation. A commercial electronic telemetry system offered by Wireless Data Corporation (WDC) was identified as a viable candidate, and information on this system was presented to GE. GE has since ordered two of these systems from WDC for temperature measurements in their rotating test cryostat.},
doi = {10.2172/366459},
url = {https://www.osti.gov/biblio/366459}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jun 01 00:00:00 EDT 1996},
month = {Sat Jun 01 00:00:00 EDT 1996}
}