Electronics > Beginners
Potting an electrolytic capacitor will make it last longer?
ogden:
--- Quote from: Gyro on September 04, 2018, 07:33:31 pm --- :=\
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Right. Potting electronics in high TC epoxy is good stuff unless you have forced air flow option.
Simon:
--- Quote from: In Vacuo Veritas on September 04, 2018, 04:46:52 pm ---
--- Quote from: treez on August 25, 2018, 06:21:10 pm ---Thanks, but i assume that in a totally enclosed enclosure, the potting compound would always make it easier for heat to get out of the capacitor?
Yes i did think of the need-to-vent too....but philips potted over the can top......probably only about 5mm of potting covering the can top though....so could still explode out.....
presumably no 'lytic explosion would be enough to fracture the 1.5mm thinck plastic enclosure
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Are you really an engineer? Which breakfast cereal did your degree come with?
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Calm down, it's a valid question. Perhaps you can enlighten us all as judging from your reply you are quite the expert but have neglected to share such expertise that allows you to be so dismissive of the question.
Edit, having seen the rest of your sarky posts i have decided to give you a few days to reflect as well as calm down!
ocset:
--- Quote ---They are potted because they are outdoor drivers.
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Thanks, i thought the same......but there are plenty of non potted outdoor drivers.
I assume potting prevents sulfur laden atmospheres from getting round the components and corroding them?
Also, the potting stops moisture from getting round the components.
Kirkhaan:
Another reason for potting a driver is that creepage and clearance distances can potentially be reduced in the design.
Such drivers are mostly mains isolated and the galvanic isolation barrier could become smaller if potting material is applied.
Don't get me wrong, its not just adding potting material and you're done. Careful circuit design and PCB layout is needed, but in the end it can lead to significant miniaturization.
Kjelt:
--- Quote from: treez on September 05, 2018, 05:14:52 am ---
--- Quote ---They are potted because they are outdoor drivers.
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Thanks, i thought the same......but there are plenty of non potted outdoor drivers.
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Show me one Extreme outdoor driver from Philips that is not potted ?
That other chinese manufacturers do not pot their outdoor drivers is their (bad) business, I can show you products designed that will not last 1 year after power is connected. The extreme series of drivers have always had high requirements, should survive lighting strikes in the vicinity, bad mains, brown out etc. etc.
Outdoor environments can be hars, damp, heat, cold, ice, and so on.
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