How can I design a dc to ac inverter which will not use a transformer?

Discussion in 'General Electronics Chat' started by BharathiMN, May 29, 2014.

  1. BharathiMN

    Thread Starter New Member

    May 22, 2014
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    Hi i have planned to design a dc to ac conveter with 12vDC input and 230VA output, Please guide me how can i design inverter without transformer?
     
  2. Sensacell

    Senior Member

    Jun 19, 2012
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    That's like asking for an airplane without wings!

    A rocket is an airplane without wings: it's terribly inefficient, complex and expensive.
     
  3. ScottWang

    Moderator

    Aug 23, 2012
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    To using an oscillator and an amplifier to amplify the voltage from 12Vac to 230Vac.
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Design H Bridge version
     
  5. BillB3857

    AAC Fanatic!

    Feb 28, 2009
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    So where does the high voltage come from to begin with? 20 car batteries in series, capacitor/diode voltage multiplier, etc, etc? After you get the high voltage, the H-bridge sounds like the best bet to chop it up and reverse the polarity.
     
  6. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    U forgot OP said VA. So It could be 1V at 230Amps :D
     
  7. BillB3857

    AAC Fanatic!

    Feb 28, 2009
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    WOW! I missed the VA tag. Looked at it only as VAC. I guess a dry cell wouldn't quite do it either, would it? Have an appointment to get my eyes checked.
     
  8. R!f@@

    AAC Fanatic!

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    The Battery type is his problem.
     
  9. Brevor

    Active Member

    Apr 9, 2011
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    The transformer is the most expensive part of a DC to AC inverter, If it were possible to make one without a transformer someone would have already done so. And they would probably be very rich.
     
  10. BobTPH

    Active Member

    Jun 5, 2013
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    It is possible to do without a transformer (but you do need an inductor). Make a step up converter to 325VDC then use and H-bridge to invert it to 230VAC. If you can get the boost converter to run in the MHz region, the inductor could be quite a bit smaller and less expensive then a 12V to 230V transformer.

    Bob
     
  11. Brownout

    Well-Known Member

    Jan 10, 2012
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    I agree with Bob. If I took my square wave inverter apart, that's what I expect to find.
     
  12. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    OP did not say 230VAC.
     
  13. gerty

    AAC Fanatic!

    Aug 30, 2007
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    You're correct..But if he meant 230VAC, he didn't tell us how much current. So either way he left out some important information.
     
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