Muhammad , are you familiar with SPWM and link inverters ? do you know the difference between SPWM and PWM ? and in the other hand , are you familiar with class D amplifier basics ? Yes , triangle wave ! but not for first stage ! for 2nd stage .
i m not familier with it. i hv only worked with PWM controller(sg3525) which is used to draw gate of the IRF540 and then transformer stuff. i hv heard this first time
hummmmmm !!!! no problem ! for understanding meaning behind SPWM and PWM see my blogs please , after that if you didn't understand , i can simplify it for you .
As you probably know , SPWM , got from Pulse Width Modulation and SPWM is Sinusoidal Pulse Width Modulation .
For SPWM , we will have many ways to create ! but the best way that you can choose is this :
Comparison between a pure sine wave and a triangular wave which has higher frequency . ( in practice we have to select Ftri=10Fsin ) ( at least ! if you select more than this , it will be better .)
you should use a comparator such as LM311 or LM339 or LM319 or ...... etc to do comparing between your triangle wave and sine wave !
And don't forget to create enough dead time for Between your SPWM and SPWM' . each SPWM consists a high frequency spectrum and a low frequency spectrum . if you use an LPF after your SPWM , you'll have your message signal ( sine wave )
I hope you got the idea.
the whole idea is great but the implementation of such things are not so simple. i got the whole idea of SPWM didnt know how to maintain deadband and other parameter related to hardware (MOSFET problems, inductors etc). becz i have to select the components which match woth others
It is pretty simple , but you need to earn some experiences , that i think you haven't now , but you should try , if you can do this project , you'll learn many things from it . for dead time: it is very simple. you can use an schmitt trigger not gate and an RCD network . try , to research about it , if you can't earn success , be sure that i'll help you .
Wish you the best
Goldsmith
Dear Pol
Hi again
If your ferrite is going to be warm , it means that it's size isn't enough , or perhaps it didn't design for this range of frequency .
And about noise , did you see me previous suggestions ? creating enough gap space and use , some glue .
Best Luck
Goldsmith
yes 0,5 A,the output is not stabil its, around 12,8 till 15,2 volt..
i want my output stabil 13,8 v,with the current 0,5 a...
in the sg3524, to make the output stabil that we want its there a formula....
i hav did it, but the output there is not stabil and still generated a noise like a clock walk...