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1/2 CV^2 = watt-seconds
1/2 CV^2 = 3600
CV^2 = 7200
V^2 = 7200/C
for 1000 microfarads,
V = 268.3 volts I think you slipped a decimal place here, I make it 2683 volts. JimB
So, it's possible, but for what purpose is a mystery to me.
so to power a 100watt lightbulb for one hour i would need :
360000/2 = C 120^2
180000/14400 =c
12.5
12.5 Farads @ 120volts ??????????????????????????????????????????
so whats the closest thing out there, not worried about price, also what would be the value on a cap this sized?
so to power a 100watt lightbulb for one hour i would need :
360000/2 = C 120^2
180000/14400 =c
12.5
12.5 Farads @ 120volts ??????????????????????????????????????????
so whats the closest thing out there, not worried about price, also what would be the value on a cap this sized?
The problem is, no electrolytic capacitor is rated at 200V
Electrolytics of 200V (and higher) are common place, and always have been.
Electrolytics of 200V (and higher) are common place, and always have been.
True, SMPS's running off 220VAC mains normally have their main smoothing cap/s (DC rating obviously) @ around 350 to 450 Volts. And they can give you a nice burn and a shock if you are stupid enough not to discharge them (mains unplugged obviously) before you start working on the PSU. Talk about burning your fingers....
In the TV game this happens always when a set is stuck in standby or the Line Stage does not start up as normal.
Main smoothing cap/s keep their energy stored for a while as there is no other drain path available...been bitten many times.
Cheers
If your stupid enough not to bleed PSU caps before working with it you'll get a hell of a lot more than burnt fingers
Being fixing TV SMPS for ever and a day. And have fixed some of the very first successfully. The Thorn 4000 was the first set South Africa saw that had a SMPS. A piece of junk that was imported to our shores early 1974....and was a POS.
Hmm, true - well as far as I can find there are no commercially available electrolytics rated 200V that have a capacitance not measured in uF
The worlds first domestic use of a SMPSU was in the Thorn 3000 series, which was a great TV - the 4000 was 'OK', and that's about it - not a patch on the 3000.