18.14 Vcontrol

I'm not sure how to go about finding Vcontrol. Using equation 18.50, and assuming we are in equilibrium so Pav=Pload, I get Vcontrol=500V. This is obviously wrong. So I'm missing something here. Any hints?

18.14 ripple

Is it correct to use equation 18.90 to find the capacitor voltage at pi/2 and 3pi/2? Then the difference should be the peak to peak ripple. Correct?

HW12 Spice simulation not converging

HW12 Spice simulation takes forever and is not converging. Any tips would be appreciated.
Regards,
Nitish

FInding Re

How do you go about finding Re when not operating at 100% efficiency?

18.10b.ii

In response to Jares, I believe you're correct. I think we use the equations found in table 18.3 for rms and peak inductor currents to answer 18.10b.ii. Does anyone disagree?

Equation 18.55 to 18.56

I'm not able to post comments to postings due to our IT security so I'm creating a post as a response. In the text it states that equation 18.56 is the averaged control to output transfer function. For that reason, vg(t) is set to zero in equation 18.55 before applying Laplace to get equation 18.56.

Chapter 18 Question (Equation 18.55)

I asked the professor about this, but it still did not make sense to me.

I do not see how you go from equation 18.55 to equation 18.56.

when I take the Laplace of equation 18.55 I get:
L*s*ig(s)= vg(s)-d'(s)*V

now I thought V is a constant. How do I get rid of the vg(s) term, and put the equation in the form of ig(s)/d(s) = V/(s*L) ????????????

thanks
Mark