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12 Threads found on edaboard.com: Electrolytic Life
Hi, ripple current in combination with ESR causes heat. ESR is relatively high for electrolytic capacitor, so the produced heat is much more than with ceramic capacitors. Heat causes drying of the electrolyte of electrolytic capacitors, so the influence of heat causes more damage with electrolytic capacitors than with ceramic capacitors. Klaus
Hello, 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.
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.
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. Brian.
See "General Description of Aluminum electrolytic Capacitors" Figures 2-10, 2-13
life Calculators 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
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?
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
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
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?
....the above electrolytic capacitor datasheet says its only got 2000 hours of life. thats sound terrible...just about 80 days continuous.... if i put one in an offline LED light it won't last 6 months. Does any reader know if it really is just 2000 hours?,
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.