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Multiple Input Rectifiers

Discussion in 'Electronic Design' started by S. Ethier, Apr 12, 2005.

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  1. S. Ethier

    S. Ethier Guest

    Is there such a thing (or method) of taking multiple AC signals and
    converting them to DC (similar to what a bridge rectifier does) and
    combining those signals together in series to form one big source?

    I know its possible to do with one AC signal using a common bridge
    rectifier and then some filters and regulators to get a relatively
    stable power source. However if I try to connect two bridge rectifiers
    together then the output of one rectifier interferes with the second...
    Any ideas?

    Steph
     
  2. [sci.electronics.basics added to followups.]

    Please, if your post truly belongs in two NGs, cross-post
    it rather than multiposting. You can and should put all the
    relevant NGs into the 'Newsgroups:' header.

    Do a web search on "voltage multiplier" Such circuits
    do something similar to what you are saying.
    If your two bridge rectifiers were powered by separate
    windings, then the bridge DC outputs could be connected
    in series. Otherwise, the connection results in some high
    current paths that do no good.
     
  3. I read in sci.electronics.design that S. Ethier <>
    It isn't clear quite what you want to do. You can't connect two bridge
    rectifiers to the same transformer winding and then add their DC outputs
    in series. But you could add the rectified outputs from two or more
    **separate** secondary windings.

    If you have only one winding, and you don't want more than a few tens of
    milliamps of current (if you are using 50 or 60 Hz), then Google for
    'voltage multiplier'. Using the traditional Cockroft-Walton circuit, you
    can multiply by about 10 times before the thing runs out of steam, but
    there is a different configuration ('parallel-fed') that allows larger
    multiplications and is more efficient (but costs more).
     
  4. Joerg

    Joerg Guest

    Hello John,
    You can get a lot more than a few tens of mA. I did one that took in
    220V mains AC and delivered a solid 900V out at two amps, continuous
    duty. This was for an amp and it could have delivered more but the
    plates of the tubes would have changed from a reddish glow to white. Ok,
    the capacitor bank was the size of half a shoe box. I was young and a
    transformer wasn't in the cards financially. You just had to make sure
    that the 220V plug got plugged in one way and never the other way around...

    Anyway, Steph might want to think of a switcher.

    Regards, Joerg
     
  5. Guest

    yup: tell us much more about what youve got and what you want.

    NT
     
  6. Guest

    yup: tell us much more about what youve got and what you want.

    NT
     
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