Hi,
i am a bit of a beginner and trying to design an inverter that goes from 12vdc to 240vac at 50hz, with power of 1kw. I need it to have less than 5% total harmonic distortion and be free from harmonics between 150hz and 1.5khz. I am only designing it, not building it.
I am trying to design a full bridge spwm circuit to do this using sine triangle comparison but am generally a bit confused with it all.
Do i need a pure sine wave output to ensure the thd is of the required less than 5%? or can this be done with a square wave output? i am struggling to create the reference sine waves and triangle (carrier) wave, what components should i be using, for the sine wave i've read about the need for an up/down counter connected to a voltage controlled oscilator, how does this work and how does it connect?
I need help as my due date is soon and i'm feeling very confused and like i'm going round in circles! Am i making this more complicated than it needs to be?
Thanks
i am a bit of a beginner and trying to design an inverter that goes from 12vdc to 240vac at 50hz, with power of 1kw. I need it to have less than 5% total harmonic distortion and be free from harmonics between 150hz and 1.5khz. I am only designing it, not building it.
I am trying to design a full bridge spwm circuit to do this using sine triangle comparison but am generally a bit confused with it all.
Do i need a pure sine wave output to ensure the thd is of the required less than 5%? or can this be done with a square wave output? i am struggling to create the reference sine waves and triangle (carrier) wave, what components should i be using, for the sine wave i've read about the need for an up/down counter connected to a voltage controlled oscilator, how does this work and how does it connect?
I need help as my due date is soon and i'm feeling very confused and like i'm going round in circles! Am i making this more complicated than it needs to be?
Thanks