500 Watt Inverter using Transistor 2N3055 along with Transformer ratings

This Circuit has been corrected while it had minor issues in the past, the circuit has been fully debugged for any problems and made 100% working now.



Utilizing this circuit you can change over the 12V DC into the 220V AC. In this circuit 4047 is utilized to create the square wave of 50hz and increase the current and afterward amplify the voltage by utilizing the step up transformer.

 

 To calculate the Transformer rating for this circuit:

The basic formula is P=VI and between input output of the transformer you have 

Power input = Power output

For example if you want a 220W output at 220V then we need 1A at the output. Then at the input you must have at least 18.3V at 12V because: 12V*18.3 = 220v*1

So you have to wind the step up transformer 12v to 220v but input winding must be capable to handle strong power of 20A.