The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "Phil Allison"
Subject: Re: PSU ripple current
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Mon, 13 Jan 2003 21:34:30 +1100
NNTP-Posting-Date: Mon, 13 Jan 2003 21:23:45 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"Robert Strand" wrote in message
> steve c l wrote:
> > Given the full wave ripple voltage across the input capacitor of a psu,
> > how does one estimate the ripple current in the capacitor. If the ESR
> > the main determining element, are there typical values of this that can
> > be used in the estimate? Some guidance would be appreciated. BTW the
> > ripple frequency is 100 hertz. and the capacitor is say, aluminium foil
> > 5000mfd steve
> It depends not only on the cap ESR but also on the transformer winding
> resistance (secondary + primary reflected into the primary).
** What a load of CRAP !!!!!
> If you can estimate the average DC voltage across the cap then the peak
> current is approximately (Vin_pk - Vdiodes - VDCav) / Rtotal.
** On which planet ??
What the fuck is Rtotal ?????
> If you can quantify all the necessary parameters it's simpler just to plug
> it into pspice.
** Or just plug you into 240 volts AC and solve everything.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup