I'm in the initial stages of designing a pure sine wave inverter. My design is as follows:
Wien Bridge Oscillator (5V at 50 Hz) -> Class D Amplifier -> Output transformer
My question is, is this a good design? Are there better designs out there? The inverter will utilize a 12V lead acid battery as its source and output 220V at 50 Hz. The Amplifier will amplifier the signal upto 12V and the output transformer will then step-up the voltage to 220V.
An alterate design that comes to mind is:
Wien Bridge Oscillator (5V at 50 Hz) -> Class D Amplifier (Amplify to 220V)
Since the battery is only 12V, by using a DC-DC Converter the DC source can be stepped upto 220V DC - which the amplifier than utilizes to amplify the sine wave signal to 220V.
How good are these designs? Will they work at all? If not, why so? And if they do, how good are they for a general purpose inverter?