400Hz line frequency transformers on 50Hz?? - Page 2 - diyAudio
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Old 2nd January 2004, 08:46 PM   #11
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Those might be actually pretty good if used with AC power regeneration circuits, just like ML does. But the secondary is a bit low for any practical SS applications (maybe only in 5v digital circuits?).
Peter,
For a moment I have already seriously thought about this option - but the 115V primary winding would ask for an amp. to drive 115 VRMS (325V pp) - not very practical (besides the huge efforts to get there).

I think a "sad experience diminsher" beer is in order
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Old 2nd January 2004, 08:59 PM   #12
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You might use step up transformer (as suggested by Fred AC Power Regeneration anybody? ) but then again you are dealing with 400Hz.
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Old 2nd January 2004, 09:41 PM   #13
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You might use step up transformer (as suggested by Fred http://www.diyaudio.com/forums/show...3674&highlight= ) but then again you are dealing with 400Hz.
Hmmm...right, good idea... and if I use another (I have enough of them ) of those transformers backwards it would be possible.
Like this:
6.3V (adjustable within reasonable limits regarding the transformers ratings) 400Hz power-amplifier output > 6.3V (as primary) > 115V secondary > 115V primary > 6.3V secondary output

For practical implementation of an AC power regeneration circuit it seems to me wether to use 400Hz or any other frequency (as long the transformers can take it, as I have learned today) should not matter much.

Remains the question if the (pretended) advantage would be beneficial enough to justify the huge efforts to power a digital circuit this way?

Peter or anyone, do You know if this is already used in commercial digital equipment (I know that Madrigal uses this principle to power the input stages of some of their SS-power amps, but digital....)?
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