Tweaker's Asylum

Posted by Elso Kwak (i) on June 11, 2001 at 02:53:15

In Reply to: Re: Practical Choke filters for power supply (Solid State) posted by Eli Duttman on June 10, 2001 at 21:30:39:

Hi Eli,
The formula for the choke input filter is I=V/942L where
I = critical current
V = output voltage
L = inductor in Henry's
Also note the choke input filter does work as good at a current lower than I critical.
To calculate the capacitor: rippleV=3.38x10^-6/LC at 50Hz.

The maximum current in my Amzilla is also 6A but at 80V! With the inductor I mentioned and four 16.800 mufarad capacitors the pi-filter has no problem. I tested it at full power in a 4 Ohm load! For the choke input filter you have to search a much higher valued choke with 6A current rating. Hopefully we are not talking at cross-purposes.
ELSO