How to generate 3 sin. waves having phase difference of 120 deg

Discussion in 'The Projects Forum' started by leoxdragon, Jun 4, 2009.

  1. leoxdragon

    Thread Starter New Member

    Apr 2, 2009
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    Hi everyone. I have to design an voltage source inverter which uses PWM method to control the state on/off of some IGBT. However, I have a problem. I don't know how to generate 3 sinosoidal waves which have phase difference of 120 degree instantaneously. (My professor suggests that i should use Wien bridge circuit to generate the sine wave)
    Can anyone suggest me something?
     
  2. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
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    This can be done with a three "partial phase shift" op amps in a loop. One was posted here quite recently. Stand by while I look for it. :)

    eric
     
  3. leoxdragon

    Thread Starter New Member

    Apr 2, 2009
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    Thank you very much, KL7AJ. Pls help me...I can wait \:D/
     
  4. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
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  5. bertus

    Administrator

    Apr 5, 2008
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