pure sine wave inverter design techniques

Discussion in 'The Projects Forum' started by rizwansalfi2000, Sep 4, 2010.

  1. rizwansalfi2000

    Thread Starter New Member

    Mar 29, 2009
    Dear Friends,

    low cost square wave inverters use two 180 degrees out of phase square waves to drive a centre tapped step-up transformer.I have once made one successfully with single 12 V battery source

    But now I want to design pure sine wave on the same lines.I am trying to produce two positive halves of a sine wave 180 degrees out of phase.I have done so by passing sine wave from inverting and non inverting amplifiers separately and then clipping negative halves.But now I am trying to amplify both positive halves using non inverting opam amplifiers but not getting the desired output though working fine in simulation.

    Actual problem is designing non inverting opam with single supply and ground reference.

    Any practical ideas please.
  2. SgtWookie


    Jul 17, 2007
    It would be easiest to do it using a microcontroller. Use a look-up table to get the reference values for sine/cosine, and the uC controlling the ends of the transformer. Make it like a Class D amplifier.
    rizwansalfi2000 likes this.
  3. bertus


    Apr 5, 2008
    rizwansalfi2000 likes this.