Transformer Wiring Diagram

Discussion in 'The Projects Forum' started by KCHARROIS, Sep 25, 2012.

  1. KCHARROIS

    Thread Starter Member

    Jun 29, 2012
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    Hello,

    So I bought a transformer and it should be in today. Although I've never worked with transformer so could someone verify that the circuit would be correct and make sure everything seems right?

    Thanks
     
  2. KCHARROIS

    Thread Starter Member

    Jun 29, 2012
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  3. MrChips

    Moderator

    Oct 2, 2009
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    Your wiring is not correct.
    What are you trying to build?
     
  4. KCHARROIS

    Thread Starter Member

    Jun 29, 2012
    292
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    Im trying to build a supply for an amp I need +25V and -25V with the 8.88amps.
     
  5. t06afre

    AAC Fanatic!

    May 11, 2009
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    Take a look here http://www.audiofaidate.org/it/materiale/20_020_020_001_PowerTransformer_FilterRatings.pdf
    What you need is the dual complementary rectifier circuit. And also a note if you need 8.88A DC your transformer must have a current rating equal to 1.8*8.88A In your case you should not draw more than about 5A in continuous mode
    Edit: Looking again at the datasheet. For a dual supply you have to use the secondary windings in serial. And hence the max DC current will be 4.44/1.8 ampere in continuous mode
     
    Last edited: Sep 25, 2012
  6. MrChips

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  7. KCHARROIS

    Thread Starter Member

    Jun 29, 2012
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    Ok so I would do this (attachment) and Mr.Chips whats wrong with your circuit?
     
  8. t06afre

    AAC Fanatic!

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    The diodes are in the wrong order
     
  9. KCHARROIS

    Thread Starter Member

    Jun 29, 2012
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    Oh I didnt notice that Mr.Chips picture had diodes backwards good call.
     
  10. t06afre

    AAC Fanatic!

    May 11, 2009
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    Be aware of that transformers has something that is somewhat misleading named "transformer polarity" I do not know if it was luck. But you connected the secondary side correct. But you need to get the "polarity" correct on the primary side also. This is mentioned in the datasheet. And take care to follow this then connecting to the primary side
     
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