Alternator testing method and system using ripple detection

G - Physics – 01 – R

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G01R 31/34 (2006.01)

Patent

CA 2413043

A method and system for evaluating the operation of an alternator based on a frequency component in the alternator output signal. The method comprises detecting a frequency component of the alternator output signal, comparing the frequency component of the alternator output signal with a threshold frequency, and evaluating the operation of the alternator 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.

La présente invention concerne un procédé et un système qui permettent d'évaluer le fonctionnement d'un alternateur sur la base d'une composante de fréquence du signal de sortie de l'alternateur. Le procédé consiste à détecter une composante de fréquence du signal de sortie de l'alternateur, à comparer la composante de fréquence du signal de sortie de l'alternateur à un seuil de fréquence et à évaluer le fonctionnement de l'alternateur sur la base d'un résultat de la comparaison. Si la composante de fréquence du signal de sortie de l'alternateur est inférieure au seuil de fréquence, l'alternateur est estimé défectueux. Afin d'obtenir la composante de fréquence, le signal de sortie de l'alternateur est comparé à un seuil adaptatif qui est lui-même généré à partir du niveau de signal de crête et du niveau de signal de vallée du signal de sortie de l'alternateur, tels que la moyenne des niveaux de signaux de crête et de vallée.

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