Neville, Yes, it works just as well. I have seen companies use this to make tube bias supplies, when all the windings wouldn't fit on one transformer. They would use the filament supply, and tie the 6 or 12 volt coil of a smaller transformer to it, then use the 120 vac side as the bias supply. Also, they do something similar to this in making a double-isolation transformer, by just using two transformers tied together this way.
There are losses, of course, I^2 R, etc, but it still works well in the end. The inverter I constructed, used a 24 vac, center tapped, transformer, making 12 Volts for each 1/2 coil, and fed the center tap with 12 Vdc. The switching transistors connect to each end of the winding, and merely switch the current to ground. It's really the same way they made the old vibrator supplies years ago, except they ran at a higher frequency so they could get the transformer size down for automotive radios. After that, they switched from vibrators to Germanium transistors to do about the same thing, except added bias windings. About all you need to add, besides the transistors, are snubbers to kill the spikes, and an oscillator/driver. Best, Will *********** REPLY SEPARATOR *********** On 6/26/2011 at 10:03 AM Neville Michie wrote: >An interesting question about making a 50/60 hertz source, >Does a 120 to 12 volt transformer have enough inductance to use as a >12 to 120 volt transformer? >Remember, the inductance is proportional to the square of the no of >turns, where as voltage is proportional. >cheers, >Neville Michie > >_______________________________________________ >time-nuts mailing list -- [email protected] >To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. > >__________ Information from ESET Smart Security, version of virus signature database 5851 (20110206) __________ > >The message was checked by ESET Smart Security. > >http://www.eset.com _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
