PWM frequency and LC filter

Thread Starter

ricperes

Joined Feb 3, 2016
3
I'm new here, I have some fairly basic doubt. I am creating a PWM signal in MatLab by comparing a sine wave (50Hz) and a triangular wave (2kHz) .... So what is the PWM frequency will output?

After getting the PWM signal filters I want to get a sinusoid, using an LC filter, but do not know what the frequency of cut should I use?

Thanks for help
 

AnalogKid

Joined Aug 1, 2013
8,223
You are modulating a 2 kHz carrier with a 50 Hz signal, so the output fundamental frequency will be 2 kHz. To demodulate it, start with a 50 Hz filter and see what the results are.

ak
 

Thread Starter

ricperes

Joined Feb 3, 2016
3
You are modulating a 2 kHz carrier with a 50 Hz signal, so the output fundamental frequency will be 2 kHz. To demodulate it, start with a 50 Hz filter and see what the results are.

ak
I had tried with this equation Fc=1/2*PI*sqrt(LC) , but with fc=50hz i didn't have good results
 
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