Alternator testing method and system using ripple detection
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United States of America Patent
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-
Oct 19, 2004
Grant Date -
Dec 27, 2001
app pub date -
Jun 26, 2001
filing date -
Jun 26, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and system for evaluating the operation of an alternator based on a frequency component in the alternator output signal. The method detects a frequency component of the alternator output signal, and compares the frequency component of the alternator output signal with a threshold frequency. The operation of the alternator is evaluated based on a result of the comparison. If the frequency component of the alternator output signal is lower than the threshold frequency, the alternator is determined as defective. The frequency component can be obtained by comparing the alternator output signal with an adaptive threshold. The adaptive threshold is generated based on the peak signal level and the valley signal level of the alternator output signal, such as the average of the peak signal level and valley signal level.
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