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Since mosfets are basically an electronic on -off switch, a simple sine wave oscillator is not much use to them. It's done by comparing a sine wave to a triangle/saw tooth wave. This is then used to drive the mosfets in a on/off pattern, similar to a PWM signal.
If the mosfets were just using a sine wave to drive the gates, they would spend too much time in the linear region. This would cause them to heat up and die, very fast.
Here is a good college thesis on inverters, and the link. https://www.google.com/url?sa=t&rct...0Au0ipm_kcr6T4GzoW6tc1w&bvm=bv.48705608,d.aWc
Well the frequency can be adjusted to either 50 or 60 hz and as for power output well looking to build a 1kva inverter.just need a good sine wave oscillator circuit to drive the power stage.
thank you for the insight into how it works.since this is achieved by comparing with a triangle wave before driving the gates in an on/off pattern do you have a circuit that does just this.would lobe to read the pdf file attached all to the end but am so busy with other stuffs that don't really have enough time on my hands as I also work so most times I am doing my projects in the night and I still have to go to work the next morning.thanks again