Pi filter design

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Besoeker

Besoeker

Senior Member
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UK
usman umar said:
actually i want the standard procedure to design a pi filter...
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You asked for PI filter for a three phase (input) DC power supply.
I would neither use nor recommend a PI filter for that application. It would put a C element across the output of the bridge and that would result in peaky currents on the output of the bridge and consequently in the AC supply to it. I have already suggested what I would do.

Anyway, filter design is generally the application of conventional circuit theory. At least, that's how I do it.

Here's a link that may help:

http://www.electronics-tutorials.com/filters/low-pass-filters.htm

The most important thing, in my view, is to study theory well and you can then apply that knowledge to circuits generally.
 
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usman umar

Member
Location
Pakistan
Besoeker said:
You asked for PI filter for a three phase (input) DC power supply.
I would neither use nor recommend a PI filter for that application. It would put a C element across the output of the bridge and that would result in peaky currents on the output of the bridge and consequently in the AC supply to it. I have already suggested what I would do.

Anyway, filter design is generally the application of conventional circuit theory. At least, that's how I do it.

Here's a link that may help:

http://www.electronics-tutorials.com/filters/low-pass-filters.htm

The most important thing, in my view, is to study theory well and you can then apply that knowledge to circuits generally.
Click to expand...

oka if i use capacitor .. how to calculate its value

i have calculated it by Q=It , Q=CV this will give C=I*t/V where V is the ripple voltage , I is the load current , t = 1/f

is above formula correct
 
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