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PWM from Sine Wave Reference

Ernest Herz
Prodigy 20 points

I am looking for a micro controller, preferably plug and play, which could be used to generate a PWM signal from a sine wave reference. It would  the core circuit of a single phase inverter. If possible we would like to get there by bypassing the DSP development route. Are you able to point me to a preprogrammed device where the only needed additions are the reference, time bases, drivers, and power sections?

  • TI__Expert 5240 points

    Ernest,

    I am afraid we dont have a pre programmed solution for you. However you would be able to put this solution togethor using examples that we have available.

    All you would need to do is implement a timer ISR example, and a PWM example in a single project. You would set the ISR to be your update rate, and your PWM value to the duty cycle to coralate to the sine wave value. You would update the sine wave value from within your Timer ISR.

    -Jason

     

  • in reply to Jason Kriek
    Prodigy 20 points

    Thanks for the help Jason.

    I have a clock rate of 7200 Hz  for a whole sine wave cycle. This translates into 25 distinct pulse widths occurring at about 50 intervals in the half cycle which defines the desired pulse train. Can you recommend some building block components or application  notes to cut down on the learning curve?

    Ernest

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