Patent ID: 8090548
Filing Date: 2012-01-03
Classification: G01R

Abstract:
1. A method for predicting defects in at least one electrolytic capacitor, the method comprising: measuring a ripple voltage between contact terminals of a capacitor, measuring a temperature of said capacitor, determining a value of a current flowing in the capacitor, determining by a digital filter a value of an equivalent series resistance of the capacitor, and the capacitance value of the capacitor, determining at least one item of information representative of the state of aging of the capacitor using a model for determining a theoretical equivalent series resistance of said capacitor according to the temperature of the capacitor, and displaying information representative of a state of aging of the capacitor by displaying information representative of the capacitance of the capacitor, and/or of information representative of at least one cause associated with the state of aging of said capacitor, according to the value of the capacitance and/or of the equivalent series resistance of the capacitor.