why does the capacitor charge to the peak of the Ac and not any other point ?

ZeroBlank

Joined Jan 22, 2017
14
why does the capacitor charge to the peak of the Ac and not any other point ?

and we know that the time of charge equals the time of the discharging why this is not the case here ?

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bertus

Joined Apr 5, 2008
21,940
Hello,

Have a look at the pages 12-30 and on of the attached PDF.

Bertus

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BR-549

Joined Sep 22, 2013
4,928
When you pour water into a bucket..........does the water level rise? It has too.....doesn't it.

The reason the cap charges to peak.....it because it has too.....it has no where else to go......like water in a bucket.

ZeroBlank

Joined Jan 22, 2017
14
Thanks a lot bertus <3 that file included almost everything i wanted to know <3 <3 <3

ZeroBlank

Joined Jan 22, 2017
14
BR-549 nice explanation that was easy to understand ^^

so basically the capacitor has already a higher voltage than the source so it starts to discharge , hopefully this is what u mean

Joined Jul 18, 2013
25,469
The degree of discharge between pulses depends to a great degree on any load applied, with no load the ripple will be near 0%.
Max.

BR-549

Joined Sep 22, 2013
4,928
When you go get a bucket......is it usually filled with water?.........or do you need to fill it?

Do buckets always come filled with water?

dl324

Joined Mar 30, 2015
14,700
why does the capacitor charge to the peak of the Ac and not any other point ?
It doesn't have to.

$$\small V_{cap}=V_{initial}(1-e^{\frac{-t}{RC}})$$

If the capacitor is disconnected from the source before about 5 time constants, it won't have charged to the peak voltage.

wayneh

Joined Sep 9, 2010
17,167
@dl324 has it right. For a bridge rectifier, R is very small and we're usually talking about 50 or 60 Hz (low and slow). That means there is plenty of time to move several time constants along the charge curve. But that's just one application out of many.