I WANT TO KNOW THAT IN AN IRON CORE TRANSOFRMER INVERTER DESINE
WHAT FREQUEENCY OF TRIANGULAR WAVE WILL BE MODULETED WITH THE 50HZ
SIGN WAVE REFERENCE?
"THANKS YOU BUT I DO NOT THINK YOU UNDERSTEND MY PERBLEM"
But it is time for you to stop shouting, and start to talk
about sinus waves and not SignWave or singsign.
You also have to present more information about exactly what
transformation you want to do.
There are a large number of possibilities.
It is possible to do low-frequency transformation using 50Hz (or
60Hz) low-voltage square-wave, sinus-wave or modified square-wave
input to the secondary winding a normal iron-core mains transformer,
and then pick up 110V or 230V semi-sinus waveform on what is normally
the primary winding. The quality of the output waveform very much
depends on the input waveform, and how much losses you will accept in
the transformer and transistors, for example if you will saturate the
iron core or not.
It is also possible to use a smaller transformer built for
high-frequency use (for example with a ferrite core), by supplying a
constant-frequency (varying pulse width) or varying freqnecy
(constant pulse-length) square wave signal to one winding of the
transformer. This solution normally also requires a feedback loop, to
let the driver side adjust frequency or pulse length depending on the
load on the secondary side.
If this makes sense to you, then you would probably not need to
ask the question you did ask, but would instead be asking about how
to compute the required size of the transformer core, required
filters to block the high-frequency noise on the output or how to
best drive the power transistors to make sure that they have very
short on/off times.
If this doesn't make sense to you, then I don't think it will
matter what answers you get, since you will probably not be able to
build a working, reliable and safe power inverter. You did realize
that the answer to any "what frequency" question relies on a number
of parameters that you have not supplied, and may possibly not know
well enough to be able to supply. Why do I say that? If you did
understand the parameters, then you would also understand how to read
the datasheets for the transformer, and the material of the
transformer core, and deduce the answer yourself.
Or even Sine Wave?
"Sine" and "Sinus" both being short for "Sinusoid" (or
Of course, nobody can understand your problem if you can't (or
won't) explain it clearly...