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12v 7AH inverter design or circuit .,......... ?

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Jul 14, 2011
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give me the design of 12v 7Ah battery powered inverter......................................or give me the circuit with theory.

inverte of 6v 4Ah possible....?

I s it possible to make a inverter from 6v 4Ah battery..................? if it is possible then give me the design of this inverter.

Here is a bare-bones schematic showing the concept behind an H-bridge inverter:

The supply is 12V.

The clocks represent the oscillator and an inverter, which deliver alternating pulses to the switching devices.

Current goes back and forth in the transformer primary, as AC square waves.

Volt level is stepped up 10x. The load receives 45 W.

Thanks . but Anyone design the 6v 4Ah battery operated inverter...............?

Which gives the output from 10 to 30Watt.

Yes, it helps if you give your specification first.

Notice the scope traces show the load gets 115 V at 231 mA. This is 26W.

In this simplified configuration the inverter will automatically draw sufficient power from the supply. In order for this to happen, it requires that your transformer has the proper step-up ratio. It also requires that you bias the transistors sufficiently (if you use transistors).

In a few cases the converter will adapt to your load. It is usually not this easy of course.

You must determine what ratings the components need to have.

The simulation shows the transistors getting 76 mA bias current. You will need to choose robust power transistors, if you don't want them to be destroyed. Your driver circuitry (clocks) must be able to apply sufficient bias current to the transistors.

Or if you use mosfets they must be the kind that can turn on full, in response to a low supply voltage (6 V).

The transformer must be designed to:
* step up 20 X
* operate at 60 Hz (or 50 Hz, if your appliances are made to run on that)
* handle 5A incoming without saturating
* provide 30W output

As I experiment with simulations, it appears a suitable Henry value for the primary is 40 to 400 mH. The transformer size will be a couple inches on each side.

This inverter produces square waves. If you want sine waves, then the driver circuitry will be more complex.

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