I am designing a series resonant converter and wanted to convert 700 VDC to 100 VDC by using galvanic isolation. The switching frequency should be about 300 kHz (the output load is R = 1\$\Omega\$).
The question is what should be the resonant frequency? Is it better that the circuit works inductive or capacitive?
Please answer me in two cases. First case is when it is an open circuit, without any controlling circuit. The second case, when it is a closed loop, with controlling loop (for example controlling PWM of the MOSFETs).