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Power Transformer Heat Load

Discussion in 'General Electronics Discussion' started by Gristle McThornbody, Apr 20, 2012.

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  1. Gristle McThornbody

    Gristle McThornbody

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    Mar 14, 2012
    I've got a power transformer where I will use only half of the center tapped secondary. I think I can push slightly higher-than-design current through that half because I'm not creating as much heat in the transformer as I would if I were using the entire secondary winding. Is that correct?

    I recognize that the actual winding will have localized heating problems if I overload it with amps, but if I use only half the winding, I'm thinking my overall tranformer heat load should be less.
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    If it's a centre tapped transformer, and if you have a bridge rectifier on half of it, you should consider changing to a configuration which uses 2 diodes and the full winding.
     
  3. Gristle McThornbody

    Gristle McThornbody

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    Mar 14, 2012
    Oops, I think I kind of skipped right past that idea.

    If I do it with full wave rectification the way you suggested, I should get the same overall voltage and current capability, while just spreading the power and heat load more evenly throughout the transformer, right?
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    This should answer your question.
     
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