pwm generation problem on F2808 dsp

It looks like you're either hitting 100% duty cycle on your pwm or your external amplifier is saturating.

thanks for the reply,Dear Shank. but i solved this problem by changing the sin vawe's sampling time from 1/10000 to 1/5000. But i still couldnt understand what is the real problem?    here is the last status of my filtered pwm output..        

Hi Ramazan

What frequency are you generating? is it above scope Nyquist frequency?

Regards, Mitja

my sine waves are at the frequency of 50 hz,Timer period of my epwm block is 1/50000 , and finally CPU clock of my F2808 dsp in simulation is 100 mhz. but i dont know the frequency of my scope. Do you think this problem is related with this?

Take a look at the waveform with smaller time scale settings and do some reading on Nyquist as the scope is not showing continuous signal, but sampled signal and if sampling signal is in the range of PWM or lower, than you might have problems.

Do you have any kind of filter on the PWM output?

thanks for your reply dear Mitja;

i adjusted time scaling already, i still couldnt see a good sine wave untill i changed the sampling time of the sine wawe to its half value. but i still dont know what is the reason.

yes, i have a lowpass(rc) filter at the output of pwm.