please i need an inverter circuit schmatic diagram that wiil give 220vac voitage and it input will be 12 or 24 vdc and wiil be able to last for 2 hour thanks

Any inverter will last for 2 hours or more if its battery is big and its load current is low. I can buy a amall 75W inverter for a low price. A car battery will last 10 hours powering it if it has a 75W load.

The current in the output transistors and from the battery will be 150A if the load on a 12V inverter is 1500W. A big car battery will explode. The transformer will be huge and will cost a fortune. Many transistirs will be needed. Rediculous.

Hello, How are you, i wanted to build a inverter, but I am just a newbie, im tired of trying that aaroncake one, dont work, i want something simple & easy to build, even if its only 60 watts if you can help contact me At Cisco229@comcast.net, i just need to see how they work, in the most basic form then I can Do the math and make it better, thank you very much

Make an oscillator from a CD4047 IC, a resistor and capacitor. The IC has two outputs which are out-of-phase and they are perfect to drive two power Mosfets that drive a center-tapped stepup transformer. Then you will have a very simple square-wave inverter.

How is the power (wattage) calculated? I was surprized that you need a 16 Amp Xformer to achieve only 300 watts. I know there is an efficiency consideration but the way I see it is 15 Amps X (120 volts X rms or .707) = 1272 watts. If we divide 300 by 1272 we get only 23 % efficiency of the xformer. Does this sound correct?

The square-wave inverter circuit heats with about 20% of its max power output. So a 300W inverter uses 360W from the battery. The battery current flows through the low voltage winding of the transformer and through the output transistors and is 360W/12V= 30A.

The square-wave inverter circuit heats with about 20% of its max power output. So a 300W inverter uses 360W from the battery. The battery current flows through the low voltage winding of the transformer and through the output transistors and is 360W/12V= 30A.

OK, Would it be more efficient if you shape the wave first? You could get some reasonable facsimile of a sine wave using an RC filter arangement. Also what you were talking about above. I do the same thing with 74HC04s (inverters). Make an oscillator with it and feed the output to the remaining inverters to get the two phases.