Why The Step Down Transformers Available In Market Has Very High Output Voltage?

  • This topic has 6 replies, 5 voices, and was last updated 1 day, 1 hour ago by davidrichard.
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  • #94531
    Abhimanyu Rathore
    Keymaster

    Question by Anirvan Kule: Why do the step-down transformers available in the local market has a very high output voltage (AC) than their rated voltage? Suppose a 0-12 V, 3 Ampere transformer gives up to 16 or 17 volt AC on secondary side which peaks to around 23 Volt after filtration at no load while it should be maximum 17 Volt dc peak if it was 12 V AC?

    #94628
    Abhimanyu Rathore
    Keymaster

    Comment by Akshay EFU: Because non-switching transformers work by induction, the open load voltage will always be higher than the target voltage. Connecting a load creates a voltage drop which will be equal to the rated output voltage. Try switching to a switched mode power supply for a regulated voltage.

    • This reply was modified 7 months, 2 weeks ago by Abhimanyu Rathore.
    #94737
    AkshayEFU
    Participant

    Lol, you just copied my response off Facebook and pasted it on here.
    Please cite your sources to avoid stealing others’ work.
    OP: https://www.facebook.com/designelectronics/photos/a.178186675538491/5362741503749623/

    #94783
    Abhimanyu Rathore
    Keymaster

    We have not stolen any of your work, your name was written in Kannada and our website does not accept other formats except English. We are editing the comment with your name.

    #96304
    niamul21
    Participant

    Thanks for the resource. I will check this out!

    #109389
    bonpharmacien
    Participant

    Thanks too for the resource. I will check this out!

    https://service-pharmaceutique.com/

    #109920
    davidrichard
    Participant

    Since transformers do not work by induction, the open-load voltage will be higher than the target voltage. Connecting the load produces a voltage drop that will equal the supplied output voltage. Try switching to an adjustable voltage regulator.

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