Capacitor deterioration judgment method

Details Capacitor deterioration judgment method Capacitor deterioration judgment method

2007-05-01

2007-05-01

Hirshfeld, Andrew H. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C324S649000, C324S430000, C324S519000

Reexamination Certificate

active

10564507

ABSTRACT:
A method for determining the deterioration of a capacitor that increases the measurement accuracy to have an improved reliability is disclosed. In this method for determining the deterioration of a capacitor, the deterioration of a capacitor including a pair of electrode bodies and electrolytic solution provided between the electrode bodies is determined by applying an AC voltage to the capacitor to measure an impedance characteristic at a frequency of the AC voltage. An inflection point appearing in the impedance characteristic due to the deterioration of the electrolytic solution is previously calculated to make comparison with an impedance value in the frequency region lower than the inflection point, thereby determining the deterioration.

REFERENCES:
patent: 4216424 (1980-08-01), Vette
patent: 6151969 (2000-11-01), Miller et al.
patent: 6169395 (2001-01-01), King
patent: 6285193 (2001-09-01), Kamitani
patent: 04-142017 (1992-05-01), None
patent: 06-342024 (1994-12-01), None
patent: 08-043507 (1996-02-01), None
patent: 2001-085283 (2001-03-01), None
patent: 2001-297954 (2001-10-01), None
patent: 2002-267708 (2002-09-01), None
Japanese Search Report for PCT/JP2005/010847, dated Sep. 27, 2005.
Brian E. Conway, “Electrochemical capacitor and AC Impedance Behavior in Electrochemical System,” pp. 393-401, with English translation.

Affiliated with

Also associated with

Rating

Capacitor deterioration judgment method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Capacitor deterioration judgment method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitor deterioration judgment method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3752907