wireless power transfer circuit diagram problem

hello, i have some issues with my wireless power transfer circuit.

firstly, the mutual inductor parameters cannot be changed.

secondly, im not getting a sine wave at the coils of the mutual inductor as shown in the picture below. and my input DC on the left hand side is 10V, frequency is 85kHz. the rectifier portion is giving me less than 3V.

what is wrong with my outputs and circuit? pelase help if possible, thank you!!

[David Goodmanson]

Hi YX, is it standard procedure to have capacitors in series with the coils in this kind of circuit?

[Yu Xuan]

hi david, the circuit i was looking for was a series-series circuit topology. am i doing it wrongly? thanks!

[David Goodmanson]

I don't really know, and I don't have simulink or whichever software that you are using, or experience with this kind of circuit. My thought was just that you have more high frequency content than you want and a series capacitor is basically a high pass device ... (though I don't know if the intent is to have a resonant cicuit). But of course thngs depend on the values of all the components (1 uF at 85 kHz being about 2 imaginary ohms), and the problem could lie elsewhere.

[Yu Xuan]

i see, do you have any suggestions though on how i can change the circuit or values etc.

[Sam Chak]

Hi @Yu Xuan

Diagnosing issues from looking at a Simscape diagram screenshot is difficult because the underlying equations are hidden. To help yourself troubleshoot, you need to decouple the math from the Simscape layout.

Could you share the governing physical equations between your Pulse Generators (inputs) and Scope1 (output) that you derived before building the model?

Try running a quick check by coding your raw equations into a MATLAB script. If the script gives you the "nice" expected results, then we know the issue is just a misconnected Simscape port or parameter. However, if the script gives you the same unexpected graphs, the issue lies in the core mathematical assumptions of the system physics rather than Simscape itself.

[Yu Xuan]

Hi @David Goodmanson thank you! I manged to run a quick check by coding it out (something like that in the program). Does this mean its more of a misconnected Simscape port? Would appreciate if you could help in that aspect or what else I should be looking for! Thank you!

[Yu Xuan]

@David Goodmanson This is what I achieved before building the model to confirm my waveforms for rectifier and inverter.

And the pulse generators parameters