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?
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:
http://www.keil.com/forum/docs/thread13111.asp
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 'inverters'.
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.
Erik
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25kHz transformer can produce some noise. 3) Efficiency 85-95%. 4) Synthesis method: analog with triangle voltage - is obsolete.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!)