Please I had an issues with the below inverter when connected to 12v there no any ac voltage coming out.Any help will be highly appreciated.

 

Three problems:
1) Your circuit diagram shows the output shorted out.
2) It won't work with two separate transformers, because there is nothing to reset the flux on each one - each transformer has average DC on the primary
3) A CD4047 doesn't have enough output to drive a large MOSFET.

 

Welcome to the forum!
The most obvious problem with the circuit as shown is the direct shorted circuit across the secondaries pf both transformers. IN addition, two separate transformers is not an adequate substitute for a single transformer with a center-tapped primary.
Beyond those problems the CD4047 does not provide adequate gate drive for the switching transistors..
And note that I started this response before Ian stated the same things.
Is this a simulation, or did you actually build this circuit??

 

Three problems:
1) Your circuit diagram shows the output shorted out.
2) It won't work with two separate transformers, because there is nothing to reset the flux on each one - each transformer has average DC on the primary
3) A CD4047 doesn't have enough output to drive a large MOSFET.

The transformer s are identical and the MOSFET IS Z44

 

Welcome to the forum!
The most obvious problem with the circuit as shown is the direct shorted circuit across the secondaries pf both transformers. IN addition, two separate transformers is not an adequate substitute for a single transformer with a center-tapped primary.
Beyond those problems the CD4047 does not provide adequate gate drive for the switching transistors..
And note that I started this response before Ian stated the same things.
Is this a simulation, or did you actually build this circuit??

I have read everything so please can show me how to make it work

 

I have read everything so please can show me how to make it work

1. (and most important) Replace the two transformer with a single centre-tapped transformer. A 12V 50Hz transformer is intended to be driven with a sinewave. You cannot drive it with a 12V 50Hz squarewave as the voltage-time constant is too high. Either you need a 15V 50Hz transformer or to run at 70Hz.
2. Replace the 4047 by a SG3525. This can adequately drive the MOSFETs and provides a dead-time so that they are not both switched on at the same time.
Selecting the right amount of dead time will allow you to produce an output which has both the correct peak and rms values and then you can use a 12V 50Hz transformer.

@MisterBill2 you're probably at this very moment writing exactly the same thing! (Great minds think alike)

 

1. (and most important) Replace the two transformers with a single center-tapped transformer. A 12V 50Hz transformer is intended to be driven with a sinewave. You cannot drive it with a 12V 50Hz squarewave as the voltage-time constant is too high. Either you need a 15V 50Hz transformer or to run at 70Hz.
2. Replace the 4047 by a SG3525. This can adequately drive the MOSFETs and provides a dead-time so that they are not both switched on at the same time.
Selecting the right amount of dead time will allow you to produce an output which has both the correct peak and rms values and then you can use a 12V 50Hz transformer.

@MisterBill2 you're probably at this very moment writing exactly the same thing! (Great minds think alike)

I have a 15v transformer, but it's not a center tap transformer. I don't have SG3525 meaning it gonna be found in my country unless I shop for it online which gonna take days but I have many of cd4047 ic. Or is there anyone that SG3525 is equivalent to SG3525?

 

I have 15v transformer, but it's not center tap transformer. I don't have SG3525 unless I shop it online, but I have many of cd4047 ic.

Hard luck.

 

The alternative to using a center taped transformer is to use a bridge power circuit, which has twice as many power devices, and is more complex to drive.
There are quite a few good circuits published, none on youtube or the other cartoon sites, but actual useful sites.
Check the "Schematicsforfree" website.

 

1. (and most important) Replace the two transformers with a single center-tapped transformer. A 12V 50Hz transformer is intended to be driven with a sinewave. You cannot drive it with a 12V 50Hz squarewave as the voltage-time constant is too high. Either you need a 15V 50Hz transformer or to run at 70Hz.
2. Replace the 4047 by a SG3525. This can adequately drive the MOSFETs and provides a dead-time so that they are not both switched on at the same time.
Selecting the right amount of dead time will allow you to produce an output which has both the correct peak and rms values and then you can use a 12V 50Hz transformer.

@MisterBill2 you're probably at this very moment writing exactly the same thing! (Great minds think alike)

I have 15v transformer, but it's not center tap transformer. I don't have SG3525 unless I shop it online, but I have many of cd4047 ic

 

To build an operable inverter you should use the proper components and circuitry... Dead time is crucial for mosfets. Snubbers on the primary of the center-tapped transformer highly recommended. Resistors in Z44 gates. Capacitors across +12V and -12V.
Ask Google "AC inverter circuit" -----

 

Another problem with your circuit is that both FET source pins are missing a connection to battery negative.
Btw, those are horrible symbols for FETs. Which pins are the D and S? It matters, because of the inherent FET body diodes.

 

Consider using a bridge circuit so that you can use a non-CT transformer. I suggest that because the transformer is the single most expensive item, unless you modify one your self. Also, there are published designs that will work, available. BUT not on yoo-toob. Check the TI website and the ON Semiconductor Website. Look for applications information.

 

Consider using a bridge circuit so that you can use a non-CT transformer. I suggest that because the transformer is the single most expensive item, unless you modify one your self. Also, there are published designs that will work, available. BUT not on yoo-toob. Check the TI website and the ON Semiconductor Website. Look for applications information.

Hmm

 

Just thinking back to the two-transformer situation. . .
If the two output windings are in parallel, and the low voltage winding of transformer #1 is driven with 12V DC for 10ms, will the voltage produced on the paralleled output windings reset the flux in transformer #2?
As a quick thought-experiment, I think it will almost but not quite reset the flux because of the losses and other voltage drops, and therefore it will walk into saturation over a number of cycles.
What does anyone else think?