MicroE
Newbie level 5
we do ac analysis when we elvuate the frequency response of an opamp. However, for the pwm controller system, how could we do the same analysis. I am urgently needing your kind help, thanks!
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ynhe said:Hi
I know your want.
There are two type of SMPS models,one is switching models and another is average models.
Switching models will exhibit the behavior of an electrical circuit exactly as if it were built on a breadboard with all of its nonlinearities.
You now have is switching model.
But SMPS circuits usually operate at high frequencies and have response times on the order of milliseconds,analysis times may be very long. Furthermore, it is practically impossible to evaluate the AC transfer function of the simulated circuit due to the switch.
Average models do not contain the switching components.
They contain a unique state equation which describes
the average behavior of the system.
So in order to analysis the system stability,you must first build the average model of your pwm controler.
I SUGGEST YOU STUDY MANY PAPER ABOUT THESE.
YNHE