There is no transformer in there... On 12/25/2015 4:19 PM, Bertho Stultiens wrote: > On 12/25/2015 11:05 PM, Gene Heskett wrote: >>> The bridge rectifier is connected to 120v so no transformer is >>> there... not sure how it gets 190vdc out of 120vac but it does. Now to >>> find some fuses for it... may be Tuesday before I can use that. >> That is a puzzle John, the best DC I can get out of that with kcalc, >> assuming a perfect bridge rectifier feeding a capacitor input filter is >> 179 volts & change. Assuming a 127 volt, more or less standard AC input >> that is. > A transformer's output voltage is rated at the rated load. If you are > not loading the transformer at the rated power, then you will usually > see between 10% and 30% higher output voltage. The amount of increase > depends on the quality of the transformer. > > So, the DC conversion at (almost) no load will be between 120 * sqrt(2) > * 1.1 = 186V and 120 * sqrt(2) * 1.3 = 220V. Taking account for a 2..3V > droop at the bridge-rectifier would mean anything between 183...217V > would be quite normal at 120V AC input. > >
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