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?
Don't know what a SignWave inverter is. Do you mean sinus
Vy triangular wave? You normally use sqare-wave in DC/DC
converters, since you do not want any power loss in the transistors.
You want them fully open or fully closed. If you can accept the power
loss and basically design a 50Hz power amplifier, then you might just
as well let the transistors produce the 50Hz sinus directly...
I MUST HAVE SINGWAVE AND I DONOT NEED 100 PERSENT EFISHIENSY.WILL
SQAUREWAVE LET LEVEL IN TRASNFORMER?
If you want it to sing, and don't care about efficiency - just
connect a powerful audio amplifier and feed it with suitable songs. A
lot of companies sells transformer-driven electrostatic
If you are not interested in singing equipment or loudspeakers,
please return to the proper terminology of DC/DC converters or
whatever you are interested in.
By the way - there seems to be something wrong with your keyboard.
Besides producing a high percent of transfer errors, it seems it only
supports the SHOUT mode.
THANKS YOU BUT I DO NOT THINK YOU UNDERSTEND MY PERBLEM AND YOU DO
NOT HELP TO MY GALPFAP.
LIVE IN PEASE AND NEVER DEVIKE HAPPEINGS.
"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...
YOU DO NOT HELP TO MY GALPFAP.
what is a "GALPFAP"?
LIVE IN PEASE AND NEVER DEVIKE HAPPEINGS.
"DEVIKE HAPPEINGS" ? what is that? maybe "divine happening" ?
What did you mean? Build inverter with sine wave output on the
iron core transformer?
I have built one on a board. Bridge driver+additional ferrite choke
(optional). PWM sine synthesis.31.25Khz PWM with ferrite coil and
500-1000 Hz PWM without it.
However, iron core transformer have some disadvantages. There
exist more advanced technology with synchronous rectification. It can
make any waveform, and use HF ferrite transformer+choke.
THANKING YOU WITH THE HELP BUT YOU CANOT GET MY PERBLUM. I NEED
HER AND YOU DO NOT SEE CHEIF.
HAVE YOU THE TRANSOFRMER INVERTER DESINE?
I LOOKING TO GET ON NEXT HELP FOR ME PLEESE SOON.
but what is a "GALPFAP"?
"I NEED HER..."
Yes, I know the feeling - But this is probably the wrong forum
I've just googled for it and found just one match:
I went there - Deja vu or recursion?
Do you want to built 220V 300W Inverter with iron core transformer
by the PWM technique?
And you want any suggestion on some points i.e. modulation
frquency, efficiency, possibility etc?
my guess is that this is going 'wild' because what the OP means by
'inverter' is a variable speed drive. such are commonly called
But since this is a guess, I suggest the OP states whethere I
guess right or wrong.
one suggestion to the OP: you are, it seems 'languagually
challenged' in that case you MUST check yout spellings "sign" GALFAP'
etc for us to have the slightest chance of helping you.
one more note: The more you SHOUT the less likely help will be.
1) The inverter works similar to class D audio amplifier.
2) Chose PWM frequency. There three aspects: a) PWM frequency must be
at least 10-20 times higher than 50Hz. So 500-1000Hz minimum. b)
Higher frequency - higher switching loses. c) At frequency less than
25kHz transformer can produce some noise.
3) Efficiency 85-95%.
4) Synthesis method: analog with triangle voltage - is obsolete. Use
a microcontroller with PWM.
Real C programmers do it by the book (ya!)