depending on your (not yet shown) driving scheme of the bridge you get different waveforms at the transformer.
But the transformer does not care if there is a rectifier at it's output or not.
Only after the rectifier you get somehow doubled frequency at L1 (again in details depending on your driving scheme)
R1 and C2 should see only minor residuals of AC (on a DC offset).
depending on your (not yet shown) driving scheme of the bridge you get different waveforms at the transformer.
But the transformer does not care if there is a rectifier at it's output or not.
Only after the rectifier you get somehow doubled frequency at L1 (again in details depending on your driving scheme)
R1 and C2 should see only minor residuals of AC (on a DC offset).
again, again, we can not know what signals you have.. so it makes answering difficult, uncertain and full of doubts for us and for you.
In case you have a low duty cycle at the rectifier ouput you have lots of current ripple and you need a better filter
in case you have a 99% duty cycle ... your filter has almost nothing to do...
again, again, we can not know what signals you have.. so it makes answering difficult, uncertain and full of doubts for us and for you.
In case you have a low duty cycle at the rectifier ouput you have lots of current ripple and you need a better filter
in case you have a 99% duty cycle ... your filter has almost nothing to do...
duty cycle is between 0.6(Vin-max) to 0.9(Vin-min),
switching is like: M1 and M4 are conducting while M2 and M3 are not and visa versa, like inverter
and filter is going to be designed for lowest duty cycle of course,
but my question is not about these things I just wonder should I use the switching frequency or double switching frequency when I calculate filter values?
as a raw estimation:
* with half frequency you get about double the ripple voltage = 200%
* with a change in duty cycle from 90% to 60% you get a change in ripplevoltage of maybe 500% ...600% (1.5 times peak current x 4 times more OFF time).
--> In my eyes it´s more important to care about duty cycle than on frequency.
I recommend to use a simulation tool to test/verify your design.
sprabw0c.pdf, 'Voltage Fed Full Bridge DC-DC and DC-AC Converter for High-Frequency Inverter Using C2000' might have interesting general overview information, maybe too basic for you.
If you're asking about the LC filter and how to calculate the component values, look for LC resonant frequency and SMPS LC filter design app notes and tutorials. Good luck.
Yes, the ripple frequency will be doubled and the filter must be designed at double the frequency of the signal coming before the rectification stage.
The last output filter does not know or care about how the signal was produced; it can only see a DC + a ripple AC. The frequency of the ripple is twice that of the original AC before rectification.
Yes, the ripple frequency will be doubled and the filter must be designed at double the frequency of the signal coming before the rectification stage.
The last output filter does not know or care about how the signal was produced; it can only see a DC + a ripple AC. The frequency of the ripple is twice that of the original AC before rectification.
The meaning is not clear.
If you drive each pair with a 10kHz train of pulses (alternately to each pair) the effective frequency gets reduced by 2.
If you drive each input with two 10 kHz signal (out of phase) then the effective frequency will be same as the input (10kHz).
Based on the sketch you have given, I conclude that the operating frequency of the transformer will be the same as the driving frequency. The transformer shown is working at 10 kHz.
Filter is easy for full bridge because generally the output inductor means your output current into Cout is continuous.
You can even cheat if you want and do a bit of emperical swapping in the free LTspice simulator.
I attach a full bridge folder, full of full bridge ltspice sims for you to look at...if you give me your full bridge spec, i will do you a full bridge sim in the free LTspice now and send it to you here