Monitoring method and apparatus using high-frequency carrier
Abstract
A method and apparatus for monitoring an electrical-motor-driven device by injecting a high frequency carrier signal onto the power line current. The method is accomplished by injecting a high frequency carrier signal onto an AC power line current. The AC power line current supplies the electrical-motor-driven device with electrical energy. As a result, electrical and mechanical characteristics of the electrical-motor-driven device modulate the high frequency carrier signal and the AC power line current. The high frequency carrier signal is then monitored, conditioned and demodulated. Finally, the modulated high frequency carrier signal is analyzed to ascertain the operating condition of the electrical-motor-driven device.
- Inventors:
-
- Knoxville, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 870400
- Patent Number(s):
- 5512843
- Assignee:
- Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- monitoring; method; apparatus; high-frequency; carrier; electrical-motor-driven; device; injecting; frequency; signal; power; line; current; accomplished; supplies; electrical; energy; result; mechanical; characteristics; modulate; monitored; conditioned; demodulated; finally; modulated; analyzed; ascertain; operating; condition; mechanical characteristics; monitoring method; frequency carrier; carrier signal; power line; electrical energy; operating condition; electrical-motor-driven device; line current; driven device; /324/322/
Citation Formats
Haynes, Howard D. Monitoring method and apparatus using high-frequency carrier. United States: N. p., 1996.
Web.
Haynes, Howard D. Monitoring method and apparatus using high-frequency carrier. United States.
Haynes, Howard D. Mon .
"Monitoring method and apparatus using high-frequency carrier". United States. https://www.osti.gov/servlets/purl/870400.
@article{osti_870400,
title = {Monitoring method and apparatus using high-frequency carrier},
author = {Haynes, Howard D},
abstractNote = {A method and apparatus for monitoring an electrical-motor-driven device by injecting a high frequency carrier signal onto the power line current. The method is accomplished by injecting a high frequency carrier signal onto an AC power line current. The AC power line current supplies the electrical-motor-driven device with electrical energy. As a result, electrical and mechanical characteristics of the electrical-motor-driven device modulate the high frequency carrier signal and the AC power line current. The high frequency carrier signal is then monitored, conditioned and demodulated. Finally, the modulated high frequency carrier signal is analyzed to ascertain the operating condition of the electrical-motor-driven device.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1996},
month = {Mon Jan 01 00:00:00 EST 1996}
}