Recent content by NexusN

I have been reading different articles about EM wave modes, it is said that in TE waves the E_z is zero, similarly for TM H_z is zero, and TEM both E_z and H_z are zero. How about the E_x and E_y in TE wave? Someone said E_y is also zero and only E_x exists in TE...is this true? Is it...

I am not sure if I have understood the dot convention correctly, but my idea is based on the tendency of the inductor refusing to change the current(magnetic flux inside it to be more accurate). Take a look at this picture: At the very beginning when the switching is open(in OFF...

Thank you very much for the explanation,:-p I think this is a very important definition I must understand before I can go deeper in SMPS, I was struggled by the current definition in the past.

Homework Statement Hi everyone, I am now studying the Flyback converter as a component in a SMPS, my question is on the transformer unit on the converter. There are Primary side and Secondary side in the converter, at any given moment only either of the sides conducts, that is, when...

Thank you very much for your help, things are much clearer now.

Thank you for your follow-up, with cross section area untouched, does it mean we can only decrease the inductance of the inductor by increasing the length, thus the size of the inductor to achieve what we want, and this is the reason the book concluded that the load current is proportional to...

Thank you for your replies, I have more ideas now if it is the case similar to the resistor formula, it looks the inductance of the inductor relates to the inductor size in a complicated way, I'd better learn more about how each factors affect the others before I can move on in the SMPS game...

Homework Statement I am struggled by a problem encountered in studying SMPS, on reading the book 'Switching Power Supply A-Z', for a passage talking about the effect of increase in load current of a DC-DC converter on the inductor size, from the ripple factor formula, r=(delta I)/I_L...

After some minutes and having read the changed described on the mentioned book, they are all the same, Vin increases --> Duty Cycle decreases, I think I've found the trick. I was wrong to use the Duty Cycle - Voltage formula, instead, I should apply the voltsecond law, Von-ton = Voff-toff, with...

Homework Statement On book 'Switching power supplies A to Z' page 73 at the bottom, (please kindly proceed to the link below for that page) http://books.google.com/books?id=cuyyQ3N_8hIC&lpg=PP1&dq=switching%20power%20supply&pg=PA73#v=onepage&q=switching%20power%20supply&f=true It stated...

Thank you very much for your answers, it is so nice of you. I think I have to spend some time to understand and do a little search for them. I have been reading some materials and currently a book named "Switching Power Supply A to Z". It looks my understanding of SMPS is still very little...

I will require to do some experiments if possible, what I am worrying is the equipment is not up to the standard for advanced work. Especially in this field, as far as I know, my college doesn't have much resources, so experiments would be limited and probably my focus will be on paper work...

Hello everyone, I am here again to ask something, though maybe silly to be raised, to obtain a clearer picture of why exactly we are implementing the SMPS in the way we are doing. Let me list them to save your time in reading: Don't bother to answer them all, it would be my honor to have...

Hello everyone, I am an undergraduate in Elec. Engineering, and will be doing my final year project(doing a research on a topic for a year). My interest is on optoelectronic, I want to study the future of integrated optics and the possibility of replacing ordinary circuit by optical...

Hello everyone, thank you for clicking the link and listen to my words. I am a year 2(and would be year 3) Electronic Engineering undergraduate, being interested in optoelectronic and would like to go deeper inside. What amused me is the possibility of integrating optical communication...