all about scr's

Discussion in 'General Electronics Chat' started by naveen gupta, Nov 5, 2011.

  1. naveen gupta

    Thread Starter New Member

    Nov 5, 2011
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    0
    i want to make an ac voltage regulator using scr that can give me 6 volt ac voltage as output , i am using 230 v ac as input voltage, can anyone tell me scr part no. that i should use?
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    Hello,

    To create a 6 Volts AC from the 230 Volts, you will need a transformer.
    A transformerless powersupply can NOT be discussed over here, as it will be UNSAFE.

    Bertus
     
  3. Wendy

    Moderator

    Mar 24, 2008
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    Really heavy duty power supply can use SCR's to regulate, but in general it is very loose regulation.
     
  4. jimkeith

    Active Member

    Oct 26, 2011
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    99
    Not only does it need a transformer, it needs series inductance or at least a transformer with poor coupling (high leakage inductance) to control the peak current into the capacitor. It must also have a voltage feedback loop to keep the voltage stable--open loop performance is poor.

    How many amps? I can give you a good circuit.
     
    Last edited: Nov 6, 2011
  5. samin

    Member

    Oct 14, 2011
    32
    6
    Perhaps you mean a 3-terminal TO220 device (LM78xx) which looks like an SCR ?
     
  6. Wendy

    Moderator

    Mar 24, 2008
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    I used to service fork lift battery chargers that went up to 600A. They use SCRs.

    A small regulator typically runs 1A to 3A.

    But I notice the OP has not mentioned current requirements, which is a major oversight.
     
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