Digital Control Question

so with digital control, can you dynamically change the coefficients that are used to compensate a Converter.

I read in the past, that one of the benefits of Digital Control was that you could change the coefficients in the last minute of production, but I was wondering if you could have an algorithm where one changes the coefficients during run time?

thanks
Mark

HW 7 - Simulation of G_vg and Zout

Hi,

I am able to plot G_vd but when I try plotting G_vg and Zout, the graphs do not get plotted? Spice does not indicate there are any errors in the circuit!

Anyone has suggestions?

HW #5 Solution?

I do not understand the HW #5 solution for the SEPIC nEET problem where we are told the solution has an error.

I do not understand the first line of the solution. I do see that the secondary voltage, referred to the primary is -vtest(D'/D) .


Also, for the s^3 pole term, I got a value R/(1+D/D')^2. I have attached that, I do not see any error in that, which does not agree with the HW solution.



thanks
Mark

HW6 Problem 1

This is a sanity heck. Should I be running into a lot of algebra when finding G? When I established reciprocity I ended up with a fraction with 16 terms in the numerator and 13 terms in the denominator. Should these results be more manageable?

DCM boost converter example

I think I am missing something in understanding how the equation for the power source value was derived in equation 11.57.Can someone elaborate on this?

CCM-DCM2 Model

Hello Folks

Did anyone find the model of CCM-DCM2 work? I can't get the output with this model.

Chapter 8, Factoring Polynomials

for pages 290-291 of book, using the inequalities of the coefficients, to factor a polynomial into an approximate form:

Must *ALL* inequalities be true to use, for example in equation 8.95.

If in equation 8.95, the first several inequalities are met, However one, such as |a4/a3| >> |a5/a4| is not met(an inequality that is later than the first two)..., could you still factor this into a form such as 8.94., and then do you go back and try and factor out the other terms into an approximate form?

I just wanted to make sure that maybe the book did not completely explain the issue.

thanks
Mark