Hi everyone ,
I uploaded the file f28379d_dcdc_buck_slx (MATLAB code) to the f28379d launcpad . Also , I opened the c2000_host_read_12M file to observe voltage, p, ı gain value. As a result the the circuit(f28379d launcpahd with boosterpack _buckconv) worked properly.( There is no problem ) (I'm using matlab 2019b)(where : https://www.mathworks.com/help/supportpkg/texasinstrumentsc2000/examples/dc-dc-buck-converter.html)
But I have a question I want to learn about the Model of voltage mode controller (F28379d_dcdc_buck).
1.What is the switching frequency of the model ? In f28379d_dc_dc buck model , Timer period was entered as 1000 in EPWM block. Beside count up mode was selected. CPU clock is 200 mHz. What is the formula of switching frequency using above informations? How can I get it ?
2.Other question is that , What is the control band width ? How long does it end the entire control loop cycle?
3.Finally , What is the sample time of this model ? In hardware settings solver window the fixed step size(fundamental sample time) was selected as 'AUTO' ? Why it was selected as auto?
Manythanks. Sincerely.
BURAK ÇAYKENARI
Analog Design Engineer at ASELSAN
