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Subject: Re: Electrolytic Capacitor, VAriation with Applied Voltage

Date: 07/26/01 at 1:23 PM
Posted by: David Kerslake
E-mail: AcuraOwner@aol.com
Message Posted:

In Reply to: Electrolytic Capacitor, VAriation with Applied Voltage posted by Alan Gore on 06/20/00 at 2:16 PM:

Alan,

If anything, I would expect the capacitance to INCREASE as a result of long term opperation at less than the rated voltage. My reasoning here is that in a classic two plate, air-gap capacitor, as the distance between the plates decreases, the capacitance increases. In the electrolytic, the "distance" is the thickness of the molecular layer of alumium oxide formed during the manufacturing process. If, as a result of long term low voltage operation, this moleculat layer became thinner, the capacitance would increase. This is just a theory -- I have not tested it.

David


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