Dear members , I have designed Pure sine wave inverter
Input = 12 v DC
Output = 320 v DC , 220 v AC
Transformer = 400 W Ferrite core transformer .
In 1st stage I have used push pull topology to convert 12 v to 320 and in second i have used Microcontroller pic16f684 , IR2110 , And mosfet to convert 320 DC to AC.
mine main issue that circuit work well at no load condition but voltage drop at load (to about 265-270 V DC ) . I have used feedback of SG3525 but after all still voltage drop. Any idea how to maintain voltage constant . PLZ PLZ help
Regards
Qamar
http://imageshack.us/photo/my-images/20/lwfw.png/
http://imageshack.us/photo/my-images/801/p5gc.png/

 

Why did you post a second thread with the exact same question ?

 

Dear bro , I have posted it only once, but if i have posted twice mistakenly then Sorry , but instead to mention it , plz help me to solve my problem , I will be thankful to u.