murnin
Newbie level 1
spwm technique pdf
Hey guys, i need to control the speed (frequency) using SPWM technique. I am using a micro of the 8051 family. I know that there r better pics to do this and even if i am using any 8051, there may be better ways to control the frequency, but i have to do it this way.
First of all, i have to compare a sinewave with a triangular to create the pulses that will control the frequency. I've seen that all the look up tables for sinewave start with 80H 83H 86H 89H and so on. The thing is that i dont want to send the sinewave to a pin of a port, but just compare its different points with the triangular. So, i am not sure how to do this. The other things is, how can i create sinewaves with different frequencies using the same look up table?
Thanks a lot!!
Hey guys, i need to control the speed (frequency) using SPWM technique. I am using a micro of the 8051 family. I know that there r better pics to do this and even if i am using any 8051, there may be better ways to control the frequency, but i have to do it this way.
First of all, i have to compare a sinewave with a triangular to create the pulses that will control the frequency. I've seen that all the look up tables for sinewave start with 80H 83H 86H 89H and so on. The thing is that i dont want to send the sinewave to a pin of a port, but just compare its different points with the triangular. So, i am not sure how to do this. The other things is, how can i create sinewaves with different frequencies using the same look up table?
Thanks a lot!!