hello everynone...anybody can help me to generate the PWM for 3-phase inverter using the PIC16F876...i used 120 conduction to generate the PWM signal...hopefully someone can help me...tq

 

Unfortunately,you can't use PIC16F876 to generate 3 pwm,you can generate just 2 pwm with the same frequency.
you need to move to 18f familly.PIC18F2331 or PIC18F2431 works just fine

 

You can generate 3 PWM easily in software. Since he only needs 50Hz or 60Hz (such a low frequency) it's a pretty easy task.

I did a 50Hz dual sinewave generation in software on a little PIC 12F675;

It would not be that hard to make it 3 sinewaves instead of 2.
All my C source code for the PIC etc can be seen on this page (near the bottom);
http://www.romanblack.com/one_sec.htm

 

There was this thread a while ago:
http://forum.allaboutcircuits.com/showthread.php?t=30020&referrerid=59932
It is a simpler processor than the 876 so could be converted.

 

tq for the valuable information..i have a problem in programming to generate the PWM signal for 3-phase inverter...can u give a source code to generate the PWM signal if possible...tq for everything...i really appreciate your kindness..