Hey Guys,

i am trying to make a flyback inverter to go from 40 VDC to apx 40 VAC 60Hz. I understand that I will basically need to charge and discharge the transformer at various intervals in order to make an AC envelope and then use an LC filter to get my signal.

The issue I am having is currently in simulation - I am trying to simulate this operation using a comparitor circuit. The idea is that as soon as the voltage in the transformer ( or a parallel inductor not sure?) hits a given voltage level (of the voltage that we want to see) the switch will turn off... here is what I have:
Am I going about this all wrong? How about when I go to make my PCB? I will maybe need to use a micro controller to do something like this:

 

Flybacks are normally used to generate DC output, they have a poor waveform to convert to a sinewave.
How much current output do you need.
What efficiency?
Do you need ground isolation between the 40Vdc and the AC?

 

I know they are usually for DC/DC but this is something different I wanted to try.

I need apx 30-40 Vpk output (not picky) not picky on current either.

As for efficiency what should I aim for? 80%?

and as for ground isolation I honestly don't know... Sorry I am new to this.

I played around with varying the on time at the fet base (.5 duty cycle at a given frequency) and came up with this: