I built a single phase inverter, as shown below. However, for PWM gate control signal of maximum 9V peak, i noticed that the output PWM voltage across the a 10k resistive load does not increase above 6V no matter how much I increase the Vdc, above .
I suspect the mosfet is in satuation, but it does not make sense as according to the datasheet states that the saturation current at 9V Vgs is above 10A.
Can someone explain to me why the peak load voltage is constant and how may I increase it with increasing Vdc?
For your information, I am using STP75NF75 N channel mosfet. I get similar results even if i change the switch to IRF740 N channel mosfet.
Apologies for the confusion due to the incorrect image!