HW12 Q13.6

Was anyone able to find the core loss in part a of Q13.6. I couldn't find a ur value in Appendix D to find the primary inductance in order to find delta B.

Any tips?

Problem 13.10

Wow, I am surprised that the total relative loss due to the proximity effect is nearly 100! That last secondary layer, at least in my calculations, really takes a beating.

Equation 13.71

Has anyone been able to figure out how equation 13.71 was derived?

December 9th and not November 9th

(11/19) Homework 12 is due in class (for on-campus students) on Friday, December 2. Off-campus students are strongly encouraged to follow the on-campus due date, but have a one-week grace period, which ends Friday, November 9, 5pm Mountain time.

I assume the grace period actually ends December 9th, not November 9th. :)

HW 13.4e

I'm having a difficult time finding the correct approach for part e) of 13.4. I made a Thevenin equivalent circuit for both the v1 and v2 ports from the model in part c), but I quickly get mired in a bunch of algebra. Did anyone else use this same approach?

Lecture 34 on magnetics

Can anyone post the link to lecture 34 (the one on intro to magnetics that was pre-recorded from last year). I can't seem to find it on the list.

Problem 13.5

Very curious. I am getting 1000's of amperes for the MMF source for the permanent magnet. This sounds wrong but may be an indication of how powerful magents can be. Any one else getting 1000's of amperes?

HW 9

Problem 8.15: Is anyone else finding that this algebra-on-the-graph problem is just a little more complicated than the examples from the book and lecture? Or am I actually sleeping right now, having another school nightmare? (Watch out, Chucky is learking just around the corner...)