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. 6 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 224982
- Patent Number(s):
- 5512843
- Application Number:
- PAN: 8-151,682
- Assignee:
- Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 30 Apr 1996
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; EQUIPMENT; MONITORING; MEASURING INSTRUMENTS; DESIGN; MEASURING METHODS; ELECTRIC MOTORS; MODULATION; ELECTRIC CURRENTS; POWER SUPPLIES
Citation Formats
Haynes, H D. Monitoring method and apparatus using high-frequency carrier. United States: N. p., 1996.
Web.
Haynes, H D. Monitoring method and apparatus using high-frequency carrier. United States.
Haynes, H D. Tue .
"Monitoring method and apparatus using high-frequency carrier". United States.
@article{osti_224982,
title = {Monitoring method and apparatus using high-frequency carrier},
author = {Haynes, H 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. 6 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {4}
}