The (+) sign on the non-polar film capacitor C1 should not be shown. The schematic is 5 years old and has been improved by changing the transformer to 10V-0V-10V and adding a protection zener diode to the supply voltage for the CD4047 IC.
A simple square-wave inverter that uses modern Mosfets is much better.
Thanks. Also tell me about the battery current, is 12v/50A works? Can i use 10A transformer?
For 500W output then the input from the battery is 600W. 600W/12V= 50A. If you use a little 10A transformer then it will get much too hot with 50A in it. 12V x 10A= only 120W then the max continuous output will be only 100W. For an output with only 100W then you do not need so many output transistors.
If you try to filter the output of a low frequency square-wave inverter then the inductor will be huge and heavy and cause too much voltage drop. The peak-to-peak voltage of a square-wave inverter is much too low anyway.
A sine-wave inverter uses Pulse-Width-Modulation at a high frequency to make a sine-wave with many steps. The high frequency is filtered out with a small high frequency filter.
The 12VDC is stepped up with a high frequency power oscillator that uses a small ferrite transformer. Mosfets are used for the power stages.
Thanks Tell me: Can i use MOT (microwave oven transformer) bcoz for higher current other transformer are too big and expensive? Can i use lead acid car battery? I have a transformer (from stabilizer)it is quite big and has lots of terminals(8) on one side. Can i utilize it?, if yes then please tell me about its terminals i don't know even its i\o terminals.
Thanks Tell me: Can i use MOT (microwave oven transformer) bcoz for higher current other transformer are too big and expensive?
A microwave oven is not designed to operate for long periods so it wastes a lot of power because its transformer is cheap (too small) and does not have enough inductance to be efficient. Then your inverter will waste a lot of power making heat.
quote:Can i use lead acid car battery?
No. A car battery is designed to supply a high current for a short duration. It will be destroyed if it is discharged too low. Use a "deep discharge" battery for a motor home.
quote:I have a transformer (from stabilizer)it is quite big and has lots of terminals(8) on one side. Can i utilize it?, if yes then please tell me about its terminals i don't know even its i\o terminals.
You don't know and I don't know.
Instead of making an inverter why don't you get your electricity fixed so it is reliable like everywhere else?
12v-220vac inverter
Posted - Sep 20 2009 : 06:49:03 AM
500w inverter final again.PNG