12 Threads found on edaboard.com: Electrolytic Life
Complementing Klaus comments:
electrolytic capacitors have a liquid electrolyte. That liquid slowly but surely escapes thru the bottom seal.
This can take many, many years if the capacitor is not being used.
However....temperature causes liquids to expand, even to boil. The increased pressure will significantly increase the electrolyte loss.
Power Electronics :: 03-14-2016 13:22 :: schmitt trigger :: Replies: 5 :: Views: 459
We have a 3kW Electric car charger which we bought. It often unfortunately shuts down when in use, for unknown reasons.
We opened it up to have a look, and noticed that it is a Half Bridge LLC resonant converter running at 100khz, preceeded by a 3kw Boost PFC.
The DC link capacitance between the PFC output and LLC input is just 810uF.
Power Electronics :: 11-15-2015 14:02 :: treez :: Replies: 11 :: Views: 683
You probably want to replace all power electrolytic caps as they will be near end of life and start with a visual inspection.
A capacitance meter that reads ESR would be helpful.
Then start debugging by comparing channel quiescent voltages.
Service Manuals, Requests, Repair Tips :: 11-10-2014 19:04 :: SunnySkyguy :: Replies: 1 :: Views: 649
You need to open one up and see what has failed. Usually, failures like that occurring after a long time of operation are due to electrolytic capacitors drying up. The only solution is to use a better type with a longer life rating and at least 105C temperature rating.
Power Electronics :: 11-22-2013 11:33 :: betwixt :: Replies: 2 :: Views: 538
See "General Description of Aluminum electrolytic Capacitors" Figures 2-10, 2-13
Analog Circuit Design :: 08-29-2013 17:09 :: Kral :: Replies: 5 :: Views: 538
The ambient temperature has the largest effect on life. The relationship between life and temperature follows a chemical reaction formula called Arrhenius' Law of Chemical Activity. The law put simply says that life of a capacitor doubles for every 10 d
Analog Circuit Design :: 05-19-2013 12:02 :: tpetar :: Replies: 1 :: Views: 547
Does it have an especially long life?
Does it have a minimal increase in ESR over time?
Is its ESR very very low, compared to "normal" electrolytics?
What defines it as an "audio grade" electrolytic?
Elementary Electronic Questions :: 04-01-2013 13:00 :: treez :: Replies: 5 :: Views: 774
you have to start with the maximum ambient temperature. This is where your heat is going to, say 40 degrees C. At the other end you have to consider the maximum permissable temperature for all components, especially electrolytic capacitors (they have a short life at elevated temperatures) and semi conductors ( which generate heat). Once you have fo
Power Electronics :: 03-21-2012 20:12 :: chuckey :: Replies: 1 :: Views: 922
Can anyone Please help me out, I'm looking for a SERVICE Manual for the Motorola R2600 Test Set
The problem I have is after I replaced the battery on the Control Board and Replaced ALL the electrolytic Capacitors on the Power Supply Board, The Unit came back to life, and it worked on
all functions except in Tracking Gene Mode. It worked fine in t
Service Manuals, Requests, Repair Tips :: 02-24-2012 02:09 :: ei2dj Mike :: Replies: 0 :: Views: 2646
What is the lifespan of ceramic, polyester, monolithic, tantalum and electrolytic capacitors? I'm restoring a MemoryMoog synthesizer built in 1983. Should I replace all the capacitors or only the electrolytic?
Elementary Electronic Questions :: 01-03-2010 04:43 :: krunchy :: Replies: 5 :: Views: 16783
vomit is right. This is how electrolytic caps are specified. Typical temperatures are 85C and 105C. Usullay the life is 2000 or 3000 hrs at one of the above temperatures. The cap's life doubles for every 10C below that temperature. So for your cap, if the maximum temperature will only be 4C, then you can expect it will last (...)
Elementary Electronic Questions :: 11-14-2008 19:31 :: VVV :: Replies: 2 :: Views: 10454
electrolytic caps behave much like a diode when reverse-biased. The breakdown voltage is around 2V. I don't think you will have any problems using the cap in your application, since the voltage is so much lower than the breakdown voltage.
Elementary Electronic Questions :: 10-15-2007 16:18 :: VVV :: Replies: 4 :: Views: 1020