Friday, April 20, 2012

HW10.3 help

All,
I'm having trouble finding the value of J to get Ro so L and C can be solved for. I have a value for JL3=sqrt(1-2u) and JL4=0 at max load for ZVS but I can't determine how to find JL1, JL2 and J. It seems I should used the eqns from problem 2 but I'm having trouble with that problem as well and can't move forward on this problem.
Thanks, Joe

Thursday, April 19, 2012

HW10.2 ZVS-QSW definitions

Hi,

In the notes with definitions for D and the angles, do the graph for v2 and the state-plane diagram match with each other? The state-plane diagram starts at (-JL4, 1), while the v2 plot starts at 0V. Shouldn't the v2 plot have started at V1=Vg, like was also discussed in the lectures? Then the v2 plot would match with the state-plane diagram again I would say.
Any comments?

Toby

Tuesday, April 17, 2012

HW9 problem 3 help

All,
I would like to know if anyone else is getting something besides Js=1.
Here is my approach. I have an equ. ckt like the boost with a half wave ZCS QR switch from the lecture notes. The current source is the current through Lm reflected to the secondary. If Js=1, then ton will be a specific value and not a range. Any help would be appreciated.
-Joe