I like your suggestions and I have taken a break from the flyback design doing other fun stuff, but now I have gotten away from the subject in order to return hopefully keeping to a better more calm approach.
My next challenges are finding a controller that allows me to build a half bridge diagonal circuit flyback circuit while synchronizing two such converters, you did suggest cycle-by-cycle current limit capability. But I find more peak current controllers while I have not been able to find or understand the biggest pros vs cons of these two current control scheams.
There name do explain what or in what frame the limiting is performed but what that does mean for me and the circuit functionality that is a big ? for me, but when you suggests one kind I assume there are reasons why you believe that that's the one most suitable in my application. finding the right one with all I want/need is not easy.
The synchronizing seems to perhaps be a problem but I am not talking about implementing it now but I do not want to get a controller that does not allow for synchronizing to be implemented since later on that will be a important point of the design.
Then the inductor-transformer, I see your point about adjusting inductance. But from what I have read Kool Mu(Sendust) powdered cores does have the benefit of smaller leakage inductance and such a core lacks the uncertainty of inductance that ferrite offer. The inductance of a coil on a ferrite core has a error marginal that can be quite wide as I understands it and that marginal have multiple contributors while a Kool Mu have non worth speaking of so I want to ask your opinion about implementing a Kool Mu core transformer in a EE style? Then I can add a air-gap... But maybe that is not a good idea.
I believe that Continuous Conduction Mode(CCM) is my aim and I do know that I can choose between CCM and Discontinuous Conduction Mode(DCM) by adjusting the inductance of the inductor-transformer as low inductance will result in DCM while high inductance will result in CCM. But what is the implication of that right-half-plane-zero that CCM adds to the transfer function?
And I don't get the implication of the 'output diodes reverse recovery problems' though that I shall research more.
The transformer will need to be able to deliver 275W max, 55V @ 5A. How much a overhead is proper to design with?
Could you say that the fact that CCM adds a DC bias to the inductor-transformer that the full wattage of a core can never be utilized for power delivery to the output?
As I see it right now I would guess that I would do well in designing a converter to operate in CCM at higher loads, say over a range of 25% to 100% output current(or is it 25-100% output power?) and then let the thing operate in DCM below 25%. Is that how you do(can do) it?
To be honest I do get confused when looking closer at how that should work when it comes to turns ratios and how the output voltage is or is not a function of that, I hope that it will make sense sooner or later but any clarification would be appreciated.
Actually I guess that in asking about things I am more looking to get advice on how to do it rather than to understand it and by that I mean that as long as I can get far enough to be able to implement the first stage I can answer most things my self by studying and trying things out for real which is the best way to learn I think. I perceive a difference such that I can read or be told that it works this way and that way but the only way for me at least to get a real understanding which include a intuition of sorts is to play with the hardware and find out by doing.
It will all be great fun, and very instructive.
This had stopped being fun, but your approach sure will be.
Thanks.
And thank you all for your inputs.
Regards