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How to create a step-down transformer?

Discussion in 'General Electronics Discussion' started by christoopher24, Sep 26, 2011.

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  1. christoopher24

    christoopher24

    6
    0
    May 8, 2011
    Hello,
    I am need of knowing how can you create a step-down transformer.
    I know about ratios and things, but if for example there is a 10:1 ratio why is there so much more wire turns in the transformer, cause clearly you don't just make 10 loops.
    So anyway, how can I create a step-down transformer?
    Let's say for example 110v 60Hz, to 32v and less than 700mA.
    Any help would be appreciated!
    Thanks!
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,411
    2,779
    Jan 21, 2010
    You need lots of turns or the transformer will have very low inductance and at 60Hz will draw a huge current.

    Whilst this current is theoretically not in phase with the voltage and theoretically consumes no power, in practice the I^2R losses (which are real) and limitations in other areas mean that it's highly undesirable.
     
  3. daddles

    daddles

    443
    3
    Jun 10, 2011
    Lots of articles about this have been written over the last century. Take a look at the following articles in Popular Mechanics: Feb 1950, May 1931, Dec 1932. These are all easily available on google books in the US (I've heard folks in other countries don't have access to them though).
     
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