Can't you add a diode-capacitor voltage doubler to the existing converter, to feed the small capacitor?i am really desperate, and even thought of adding a stand-alone independent boost converter to make 300v out of the 12v battery
a voltage doubler will not work - the output of the flyback is not AC - it is DC pulses if i understand it right.
i will try two coils in parallel-series, but this too, sound a bit sluggish...
the first coil will output already a few kilovolts, which is too high for returning into the primary of another coil on a PCB with 5mm spacing legs...
No, no, that's not what I meant! The output of the first coil should not be fed to the input of the second coil; rather, the inputs of both coils should be tied together in parallel, while the outputs of both coils should be tied together in series. (Hopefully they are built to withstand the voltages incurred; you may want to do a study on the robustness of this configuration).
but in trigger coil, those who have 4 pins and not 3 pins, the start of the secondary pin is really near the primary legs, because it should be tied to one of the primary legs. the end of the secondary is a flying wire away from the PCB,
i am afraid that if i feed the flying wire HV output of trigger coil number one into the SECONDARY start of trigger coil number two (which is located 5mm away of the primaries) it will arc with the primary, even before talking about the (doubled) output of trigger coil number two.
Flyback converters can be used with voltage multiplying rectifier circuits and are quite often for HV supplies (e.g in a classical TV). But a simple doubler doesn't have considerable effect, because it only adds the most likely smaller forward voltage (about 120 V with 12 V + 1:10 transformer). More stages are needed.
I was thinking of something like this. I suppose it's not exactly a doubler, but it should work as some sort of multiplier. I'd expect HV2 to be a bit more than double HV1.a voltage doubler will not work - the output of the flyback is not AC - it is DC pulses if i understand it right.
Yes, it's a voltage trippler, in this case generating 2*Vflyback (Vflyback = HV1) + 1*VforwardI'd expect HV2 to be a bit more than double HV1.
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