I have just started learning about inverters. The following diagram has been intriguing me for the past few days:
Apparently, this inverter works if some PWM is applied to the MOSFET gates.
I would like to know if there is any way to make this inverter work without the PWM. If not, is there any other way to make an efficient inverter without the use of ICs or PWMs?
Yes, but only if a modified square wave output is appropriate for your load. Also note the the output is floating wrt ground (no ground).
Yes, easily. You can use a ferro-resonant transformer which is tuned to the required frequency. This can be driven by a square wave and produce a sine wave (10-15% distortion) output. The frequency can be pulled by several percent with only a modest increase in distortion.
There is an interesting set of Youtube videos on Ferro-resonant transformers that may pique your interest, though this is mostly about producing regulated AC.
The answer to your question "will it work" depends on requirements. If you want to drive your load with square wave (including all the harmonic frequencies producing EMI noise) then yes. Beware that an H-bridge may fail catastrophically if you open the two transistors on one of the sides concurrently. There are chips to prevent that and to properly bias the gate of the high side FET. A good old example I remember is IRS2001 (and similar).
