Demodulation circuit for AC motor current spectral analysis

Patent · Tue Dec 18 00:00:00 EST 1990

OSTI ID:867654

Hendrix, Donald E ^[1]; Smith, Stephen F ^[2]

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1. Oak Ridge, TN
2. Knoxville, TN

A motor current analysis method for the remote, noninvasive inspection of electric motor-operated systems. Synchronous amplitude demodulation and phase demodulation circuits are used singly and in combination along with a frequency analyzer to produce improved spectral analysis of load-induced frequencies present in the electric current flowing in a motor-driven system.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Assignee: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 4978909
• Application Number: 07/401,728
• OSTI ID: 867654
• Country of Publication: United States
• Language: English

Related Subjects

demodulation
circuit
motor
current
spectral
analysis
method
remote
noninvasive
inspection
electric
motor-operated
systems
synchronous
amplitude
phase
circuits
singly
combination
frequency
analyzer
produce
improved
load-induced
frequencies
flowing
motor-driven
spectral analysis
electric current
electric motor
current flow
motor current
current flowing
analysis method
current analysis
electric motor-operated
current spectra
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