Components of 500w inverter
C1061 or 2SC1061-2
100K preset – 1
12-0-12v Transformer 10A – 1
The drain pins of the n-channel power MOSFETs IRFZ44 are linked to the secondary pins of the transformer, and the common pin in the secondary winding is connected to the battery positive. The negative connection of the battery is linked to both MOSFET source pins. The MOSFET turns on when the alternate square pulse from Q & Q’ drives it. The secondary winding is then driven to create a different magnetic field. This generated magnetic field generates a high alternate voltage of roughly 220V.
How to calculate the transformer ratingThe basic formula is P=VI and between input-output of the transformer we have Power input = Power output
For example, if we want a 220W output at 220V then we need 1A at the output. Then at the input, we must have at least 18.3V at 12V because 12V*18.3 = 220v*1
So you have to wind the step-up transformer from 12v to 220v but the input winding must be capable to bear 20A.