Apr 21, 2006 #1 L lj053 Junior Member level 3 Joined Nov 7, 2004 Messages 27 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 204 Can anyone tell me what the ripple looks like is a good design. Its like a ^^^^^^ or ~~~~~~? thanks.
Apr 21, 2006 #2 I IanP Advanced Member level 7 Joined Oct 5, 2004 Messages 7,929 Helped 2,311 Reputation 4,624 Reaction score 531 Trophy points 1,393 Location West Coast Activity points 66,416 The ripple in output voltage appears to be sinusoidal (output smoothing capacitor).. see picture below .. Regards, IanP
The ripple in output voltage appears to be sinusoidal (output smoothing capacitor).. see picture below .. Regards, IanP
Apr 21, 2006 #3 L lj053 Junior Member level 3 Joined Nov 7, 2004 Messages 27 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 204 Hello IanP: if you add the esr(200mohm) to the output cap. Its output ripple just like ^^^^, not sinusoidal.
Hello IanP: if you add the esr(200mohm) to the output cap. Its output ripple just like ^^^^, not sinusoidal.
Apr 21, 2006 #4 I IanP Advanced Member level 7 Joined Oct 5, 2004 Messages 7,929 Helped 2,311 Reputation 4,624 Reaction score 531 Trophy points 1,393 Location West Coast Activity points 66,416 Therefore I used the word "appears" not "is" .. In a "good design" you don't have just single capacitor as the output LPF, but there will be another L-C stage .. Rgards, IanP
Therefore I used the word "appears" not "is" .. In a "good design" you don't have just single capacitor as the output LPF, but there will be another L-C stage .. Rgards, IanP
Apr 21, 2006 #5 L lj053 Junior Member level 3 Joined Nov 7, 2004 Messages 27 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 204 Hello IanP: In a "good design" you don't have just single capacitor as the output LPF, but there will be another L-C stage .. You mean to add another L C filter at the output? thanks.
Hello IanP: In a "good design" you don't have just single capacitor as the output LPF, but there will be another L-C stage .. You mean to add another L C filter at the output? thanks.
May 13, 2006 #6 H hktk Junior Member level 3 Joined Feb 2, 2005 Messages 27 Helped 2 Reputation 4 Reaction score 0 Trophy points 1,281 Activity points 263 does IanP mean the pi filter used as LPF? it is formed by a large capacitor, an inductor and another capacitor.
does IanP mean the pi filter used as LPF? it is formed by a large capacitor, an inductor and another capacitor.