No. The transformer is designed for 100 KHz. I had it wound special for me. ----- Original Message ----- From: "Sean Breheny" To: "Microcontroller discussion list - Public." Sent: Saturday, August 09, 2008 11:34 AM Subject: Re: EE > As usual I realized after I hit send that you probably just divided :) > I should further engage brain before engaging mouth (or typing > fingers). > > Hmmm...somehow, though, it sounds to me like he wants to put a 100KHz > sine wave through a transformer designed for 50 or 60Hz. If so, I > don't think that will work very well in terms of core losses, skin > effect losses, winding capacitance, reduced coupling from pri to sec, > etc. > > If, on the other hand, he is using 100KHz PWM to synthesize a 50Hz > sine wave, for example, then that should work well (although the PWM > frequency is a bit high). > > Sean > > > On Sat, Aug 9, 2008 at 8:42 AM, Apptech wrote: >>> Where did you get 16 ohms from? >> >> R = V/I. >> The driver sees the load reflected via the transformer. If >> 230 VAC causes 14 amps to flow then the AC is seeing 230/14 >> ~= 16. >> >> In the absence of load the actual transformer impedance will >> be seen but it will very usually b swamped when loaded. >> >> >> Russell >> >>>>>> I have to drive a transformer primary at 230 VAC @ 14 >>>>>> Amps @ 100KHz. I have not yet measured the primary >>>>>> impedance, but I will. >>>> >>>> The impedance you see will be about 16 ohms - ie the >>>> load, >>>> more or less regardless of the transformer's unloaded >>>> impedance. >>>> >>>> >>>> Russell >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist