Study of an Electrolytic Capacitor Model as a Function of Temperature
2006
SummaryWith to their large capacity and their low price, electrolytic capacitors are used in many fields of power electronics, mainly for the filtering and energy storage functions. Their characteristics move strongly according to frequency, and temperature. Temperature variation is generally not taken into account in electrical simulation software. In many applications such as transport, industry, space one or in military applications, the variations of temperature are significant. A model taking into account these variations seems to be essential. In this study we propose to define a simple model taking into account characteristics variations of the electrolytic capacitors according to the temperature and frequency. A method of identification is proposed based on genetic algorithm. A good compromise between simplicity and precision is one of the objectives of this study.This identification was carried out for large electrolytic capacitor of rated value 4,7mF/500V. The comparison between measurements and...
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