Title :
A DSB-SC demodulation technique for nonintrusive diagnostics of motor-operated valves
Author :
Josh, Bela D. ; Upadhyaya, B.R.
Author_Institution :
Dept. of Eng. Manage., Old Dominion Univ., Norfolk, VA, USA
Abstract :
The health of motor-operated valves (MOVs) used in nuclear power plants may be monitored by analyzing the current drawn by its motor. This paper presents a technique for demodulating double sideband suppressed carrier modulation, an essential prerequisite for motor current analysis. Unlike conventional methods of demodulation, the technique does not require a synchronized sinusoid. The practical applicability of the technique is demonstrated by monitoring a nuclear-grade MOV through motor current analysis
Keywords :
demodulation; electric control equipment; electric motors; machine testing; monitoring; nuclear power stations; power station control; valves; applicability; demodulating double sideband suppressed carrier modulation; monitoring; motor current analysis; motor-operated valves; nonintrusive diagnostics; nuclear power plants; Demodulation; Frequency synchronization; Monitoring; Power engineering and energy; Power generation; Signal processing; Synchronous motors; Testing; Transient analysis; Valves;
Conference_Titel :
Industry Applications Conference, 1995. Thirtieth IAS Annual Meeting, IAS '95., Conference Record of the 1995 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-3008-0
DOI :
10.1109/IAS.1995.530534
