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

Volume

3

fYear

1995

fDate

8-12 Oct 1995

Firstpage

1849

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1995. Thirtieth IAS Annual Meeting, IAS '95., Conference Record of the 1995 IEEE

Conference_Location

Orlando, FL

ISSN

0197-2618

Print_ISBN

0-7803-3008-0

Type

conf

DOI

10.1109/IAS.1995.530534

Filename

530534