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DC to AC inverter using 555 Timer

DC to AC inverter using 555 Timer

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Tue Mar 16, 2010 12:32 pm Post

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Re: DC to AC inverter using 555 Timer

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Wed Mar 24, 2010 4:40 am Post
If we use high frequency , we can use a small tramsformer!
like SMPS power supplies.


Re: DC to AC inverter using 555 Timer

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Wed Mar 24, 2010 7:53 am Post
Dear Friend,

Small transformers  have low efficient in  low frequencies like 50 Hz.  Because their power density is low in low frequencies.  If we want to  obtain a 50Hz AC signal  we can do switching with a high frequency as you have mentioned.
But to reduce the output A/C frequency to 50 Hz , we have to convert the high frequency AC signal again to DC  and then can obtain a 50 Hz signal  , by switching transistors in 50 Hz.

And if we want to make the transformer small , we can not use lamination core and core should be ferrite.  Because
the magnetic properties of the ferrite are the main thing , that increase the power density , when have a high frequency signal.


Re: DC to AC inverter using 555 Timer

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Fri Feb 04, 2011 10:15 am Post
Yes, definitely right! If you use high frequency, then you need a small transformer. This has suggested by one of my friends, Magneto gave you the details on how this works.



Last edited by Neo on Fri Feb 04, 2011 2:48 pm, edited 1 time in total.

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Re: DC to AC inverter using 555 Timer

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Fri Mar 11, 2011 1:41 pm Post
There is something a bit confusing to me, specificley how the transistors amperage rating will change the
maximum output current.

By using the TIP41 & 2A, will there be 6A of 120V available?

The other alternative I'm guessing is that 6A of 12V is allowed to go through the primary resulting in .6A of 120V out the other side.

This being true, would additional transistors be connected in parallel on each respective side to increase the output wattage?

I've already got a transformer rated at 800w, and 2n3055 15A transistors.  If I was to use them with a bank of , would it suffice to say that 5 connected together on each
side would allow 75A of 12V through the primary resulting in 900W of 120V available?


Re: DC to AC inverter using 555 Timer

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Sun Mar 13, 2011 12:55 am Post
Best thing you could do is, do a little experiment with it. Since the circuit is not difficult to make, with a scope you could measure all ratings and adjust as you want.
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