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Registered Member #1933
Joined: Sat Jan 24 2009, 10:53PM
Location:
Posts: 6
Hi does anybody know how determine the current of a capacitor? It's easy to determine the energy stored but I need how long a discharge takes to calculate the current. My capacitor has these specifications:
Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
This is the only aluminum electrolytic capacitor from sprauge at 2200uF / 250V I could find, you can use the ESR values from the datasheet to calculate you discharge time through whatever load you might have in mind. datasheet:
math that might be useful:
A little google quality time and you could have found this by yourself, but here it something for you to read :)
Registered Member #1822
Joined: Fri Nov 21 2008, 08:04PM
Location:
Posts: 300
This depends on the load almost entirely especially if it has a decent amount of resistance. You need to know the RC time constant. R*C= Time in seconds it take to reach 63% of the original or supplied voltage.
Registered Member #193
Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
If the cap is discharged into an inductor and the resistances in the circuit are small, the peak current can be calculated from 1/2 I^2L = 1/2 V^2 C In any event, this will be the maximum current you can get.
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Capacitor current
