Hi All.
I am moved here for the LLC and questions tips. Reason is I am busy with low power, high voltage LLC.
Problems are feedback, resonance amd Lm Q what is best.
Output is 2 x 120 volts 250 mA 1 x 180 volts 250mA (use a voltage doubler here) and 6.3 and 12,6 volts 10 amps.
I do use feedback on the 12,6 volt, but when draw more current the high voltage go quite high, when draw lower it get less high, se need to do something about that.
I have some transformers and hev order also edt 39 and have edt 49 already received.
So now fun, and carefull because of voltages.
Pics here are some sims, the feedback do work, but it is quite dependent of frequency swing, I do not use a pfc,
I am moved here for the LLC and questions tips. Reason is I am busy with low power, high voltage LLC.
Problems are feedback, resonance amd Lm Q what is best.
Output is 2 x 120 volts 250 mA 1 x 180 volts 250mA (use a voltage doubler here) and 6.3 and 12,6 volts 10 amps.
I do use feedback on the 12,6 volt, but when draw more current the high voltage go quite high, when draw lower it get less high, se need to do something about that.
I have some transformers and hev order also edt 39 and have edt 49 already received.
So now fun, and carefull because of voltages.
Pics here are some sims, the feedback do work, but it is quite dependent of frequency swing, I do not use a pfc,
Attachments
Hmmm the voltage doubler is not a very good idea, I see when regulation kicks in at different currents, the frequency pwm changes and cause a very high voltage. I have replace it for a normal output rectification. Now I see the voltages does very nice.
PS the high start voltage is because I have not yet do a startup delay, so ignore these and look further in sim for real primairy current.
PS the high start voltage is because I have not yet do a startup delay, so ignore these and look further in sim for real primairy current.
