How to generate three phase sin wave

Discussion in 'The Projects Forum' started by charan0202, Mar 1, 2010.

  1. charan0202

    Thread Starter New Member

    Mar 1, 2010
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    sir can any body tell mee how to control three phase sin voltage using single varaic . my aim is to generate 50hz 15 v three phase whose magnitude can be varied between 0-15v please help me
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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  3. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    Could be done safely electronically say, using a phase-locked loop locked to a low voltage single phase 50Hz input. A 'crude' 3-phase generation could be done within the loop using a 3-stage Johnson counter. The 3-phase square waves could be filtered to produce a reasonable sine wave in each case. Amplitude control could probably be accomplished using an appropriate technique - the trick being to do it concurrently for all three phases.
     
  4. eblc1388

    Senior Member

    Nov 28, 2008
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    Three-phase variac + three mains/15V transformers(or one three-phase transformer).
     
  5. t06afre

    AAC Fanatic!

    May 11, 2009
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    For a education demo. I once used Labview, sound card, and a external amplifier. Just then I was writing this the idea of using a allpass filter (Google it) came to me. After some fine tuning it may work for you(or not). But it is easy test on bread board
     
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