Accession Number : ADP010193

Title :   Electrical Signature Analysis Applications for Non-Intrusive Automotive Alternator Diagnostics

Corporate Author : OAK RIDGE NATIONAL LAB TN

Personal Author(s) : Ayers, Curtis W.

PDF Url : ADP010193

Report Date : APR 1996

Pagination or Media Count : 11

Abstract : Automotive alternators are designed to supply power for automobile engine ignition systems as well as charge the storage battery. This product is used in a large market where consumers are concerned with acoustic noise and vibration that comes from the unit, as well as overall quality and dependability. Alternators and generators in general are used in industries other than automotive, such as transportation and airline industries and in military applications. Their manufacturers are interested in pursuing state-of-the-art methods to achieve higher quality and reduced costs. Preliminary investigations of non-intrusive diagnostic techniques utilizing the inherent voltage signals of alternators have been performed with promising results. These techniques are based on time and frequency domain analyses of specially conditioned signals taken from several alternators under various test conditions. This paper discusses investigations that show correlations of the alternator output voltage to airborne noise production. In addition, these signals provide insight into internal magnetic characteristics that relate to design and/or assembly problems.

Descriptors :   *SYMPOSIA, *ALTERNATORS, *MAGNETIC SIGNATURES, QUALITY CONTROL, POWER SUPPLIES, STORAGE BATTERIES, ELECTRIC GENERATORS, TIME DOMAIN, FREQUENCY DOMAIN, IGNITION SYSTEMS.

Subject Categories : Electric Power Production and Distribution
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE