several ways: -cores have certain specific maximum flux densities before going into saturation. See catalogs of lamination-producers.
- wire diameters can be measured, one square millimeter can be rated at about 3-4 A Best is to combine both versions to cross-check. Jan Date sent: Mon, 22 Nov 2004 08:20:30 -0800 To: Multiple recipients of list CHIPDIR-L <[EMAIL PROTECTED]> Send reply to: [EMAIL PROTECTED] Organization: Fat City Network Services, San Diego, California > Hello Group, > Maybe a little off topic but hopfully somebody can help or steer me to > someone who can. > I have a relatively large power transformer I believe was from a computer > related application. It has core dimensions of 1 1/4 x 5 1/4 x 4 3/8 and I > am trying to get an idea of it's power rating. I has three primary taps for > 105, 115 and 120 volt operation and 2 secondaries. > One secondary has a centertap with large lugs for a high current 5 volt > supply. By stepping up the load over a few hours, I was able to get the > OTHER ONE, WITHOUT a centertap and smaller lugs, to provide 12.38 amps at > 26.44 volts, drawing 3 amps input at 120 volts. > By feel it seems to get a little to warm to touch after an about hour. I'm > guessing it's at least 100 degrees f. > The numbers on it are as below but I was unable to find out anything with > them. > ECT-100-115-20 > 72149-2405A2 > How can I determine the capable amperage without overloading it? Also most > of the supplies I have seen use a centertapped winding with a full bridge. > Could I still get the same results by using it without a centertap and > create my own ground reference or is this the wrong animal to use to build a > high power supply? If so, can anyone use it? > > Thanks and sorry for the long post > > Jim > > > -- > Author: Tim Johnson > INET: [EMAIL PROTECTED] > > Fat City Hosting, San Diego, California -- http://www.fatcity.com > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > mit freundlichen Gruessen---best regards----cordialement Jan Philipp Wuesten Frag'Jan Zuerst -----Ask Jan First(R) Dipl. Ing. Jan Philipp Wuesten Elektronik Rodauer Strasse 38 D- 64372 Ober Ramstadt, Germany Phone: +49-6154-575556 Fax : +49-6154-575557 <http://www.die-wuestens.de> (Deutsch, English, Francais) mail to <[EMAIL PROTECTED]> or <[EMAIL PROTECTED]> ************************************************** Aktuelle Info: Abonnieren Sie unseren Newsletter Stay updated: Subscribe to our newsletter: Restez en ligne: Abonnez-vous � notre courriel de nouvelles: Info: <http://www.wuesten.net/news.htm> ************************************************** -- Author: Jan Wuesten INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
