HW #9 Solution ?

How come there is no HW #9 solution?

thanks
Mark

any way to re-create a schematic using .cir files from HW7 solution ?

Hi, For HW7 flyback solution, we were provided .cir Spice files. Is there any way for Spice to create a schematic (.asc file) out of it? Regards, Nitish

SPICE Boost

Hey everybody,

I was having trouble getting a fast enough op-amp for my comparator to handle the sawtooth at 200kHz. I found an op-amp that has a good enough gbw, but the slew rate kills everything and I cant turn the MOSFET on.

Any thoughts?

danny

HW9 P1 - Voltage Loop Gain

For HW9 P1a, I was using figure 12.25a of the text as a guide, and as such I was able to get an equation for Gvc based on eqn 12.73. However, the voltage loop gain using this model would incorporate Fv as a multiplier (Tv = Gc(s) * Fv * Gvd(s)), and since Fv = 0 in model 4, I am inclined to think maybe I need to change the model in 12.25a to compensate for model 4 in some way. Could anyone give me a hint here?

HW 9 part(c)...do we use model(4) results that match 2nd order Pade approx, sampled data model results?

In HW9, problem 1(a), it appears that to evaluate the given compensator design, we need to use averaged model (4) results that match the first order Pade approximation results of the sample data model. Then in 1(c), we are asked to use the "more accurate" model to design the compensator. Are we expected to use the modified averaged model (4) whose results match the 2nd order Pade approx. of the sampled data model (or do we still use the first order results)?

HW10 Boost ACM (a)

I was just wondering if anyone out there had looked at part (a) for the Boost ACM problem from HW10. I'm a little confused on exactly what parameters we can set for the sawtooth since the switching frequency and the amplitude are given.

I'm thinking it has something to do with the minimum voltage of the sawtooth. I've read the papers on ACM posted online, and Dixon makes it seem like the slopes need to be the focus, though we have no control over these.

The problem does say to just sketch the "waveshape," so perhaps numbers are not important?

Anyways, can anyone point me in the right direction?



Thanks,

Danny

IEEE 1547 standard used in USA for connecting distributed sources to the power grid

In reference to the standards discussion in lecture 31, I would like to state that all distributed power sources in USA (anyone producing power other than the utilities) must meet the IEEE1547 standard, in order to legally connect to the power grid.