low power resonant frequency transformer design
hi there folks.. Please can someone who knows anything about "resonant transformer" design - please try to help me understand some problems I am having.
I have 2 C-cores to form a closed loop core.... I have a primary - a feedback winding, and a secondary winding... On the other two joined legs.. I have two other coils wound - which will form a tuned circuit - with the secondary, all in series and a capacitance of about 800 pfd - will cause that whole circuit - to become a tuned resonant circuit....
When it is examined - it is much like a normal CVT - except that there are two choke windings... and that the two choke windings are - connected - one to the top side of the secondary - and the other to the bottom side of the secondary... the capacitance is connected between the two choke windings...
What I would like to know - is how do I calculate the values of the secondary and primary windings... The feedback winding - is much the same as the primary winding....
When I examined the master transformer of this configuration - it was found that the secondary was = 1 H approx... L1 = 1.1 H... L2 = 1.2 H...
What I have to evaluate is how do I calculate the values of the necessary parameters I need to consider, and then how do I get these values to be valid for a design of other configurations....
It is easy enough for me to calculate the two chokes - but I also need to know how to calculate the secondary windings value..... along with the primary winding...!!
Also - what does the mutual inductance between the two chokes do to the calculations...??? - is it important..?? - what about the other calculations that will involve the secondary ratio to the chokes... and the primary..?? What do I do to get the designs to such a point that it is accepted that the transformer will work as a resonant transformer - for say the frequency of the values of the capacitance and the two chokes....???? This frequency could be - 4.8 kHz.... say up to 6 kHz...??? (so the cores are ferrite - or high quality powdered iron cores...).
Please could someone help me in this little design... I find it most intriguing... - and I hope that someone can help me with the necessary math... I will be really excited...
... and now as always -
My Kindest Regards
Spencer ...
South Africa...
sabspencer@gmail.com
P.S. - if more details are needed - please contact me on the email address - and I will try to supply more details... I do not know what is necessary???
Comments
Hi there Sir..!!! - Do youhave access to the IEEE papers...???
I wonder if you do - whether I could ask you to do me a favour please...??? - and maybe have a "squizz" - to see if anything useful is there.???..
I have been trying all sorts of routines and procedures to try to track anything useful... but alas.... I have not found a single thing - anywhere..!!!
My Kindest Regards
Spencer.
Hi,
I remember having seen papers/notes published by a company called Siliconix on this subject many years ago.
I am afraid I do not have them. You may be able to find them on the internet or from someone who may have them in their collection.
Regards
PI-Sarek

Hi,
I am afraid I am not an expert on the configuration that you are experimenting.
You may find published information such as IEEE papers etc. that may be useful.
Regards
PI-Sarek