Very very VERY good content. Been on a 16 hour streak of building, capacitor desoldering, and resonant frequency calculations without online calculators; this just made my day my friend. Keep making content. Im working on an electromagnetic railgun design next, could always use a video on that LOL
I have always understood the 'Dual Resonance' part of a DRSSTC to be matching the inductance and capacitance of the primary circuit (which indeed, as you pointed out, should resonate at the same frequency as the secondary + topload + streamers) such that the impedance of the primary circuit consists only of the resistance of the coil wire and the ERS of the capacitors; the reactance is thus equal to (or nearly) zero. You pointed out that having your reactance too close to zero results in (often dangerously) high current, but didn't really mention the connection between this effect and the efficiency gains that this "dual resonance" affords. One way to "beat" (pun perhaps intended) the high current is to use an interrupter circuit to ensure that current does not get so high that it leads to catastrophic failure of the driver switches; one needs also to take precautions that 'zero voltage switching' occurs within the driver (or again, the switches - MOSFETs, IGBTs, etc. - will be destroyed).
I guess a top load is the only way to add capacitance to a slayer exciter then? Everything I've made has been in the mHz range and it's not easy on components. Things die when I put caps inline with the primary 😆
Well, yeah, as I say in the video, to decrease the frequency just add turns, or length, or wind on a larger diameter tube.....or add top load. Yeah for the single switch circuits like the slayer exciter and kacher, you cant put a cap in series with the primary. When running those circuits i always choose a very tough transistor.
@@ElectricMonkeyBrain I pretty much did all of the above today and ended up having a lot of fun!! Lit up a bunch of different bulbs and LEDs, made some cool sparks and arcs, and finally made something reliably stable to expirement with. I'm using a TIP3055 at the moment and it seems to be handling the abuse fairly well. I'll inevitably push it too hard but it seems to be a tough little fella so far, if it's even a genuine component lol
That chart to calculate the resonant frequency of a coil doesn't even come close! I put in the size and number of turns and it came up with 489 KHz but when I measure it I get 264!
Very very VERY good content. Been on a 16 hour streak of building, capacitor desoldering, and resonant frequency calculations without online calculators; this just made my day my friend. Keep making content. Im working on an electromagnetic railgun design next, could always use a video on that LOL
Brilliant! Clear, concise and on point!
thanks
Please could you show us how to do the resonant frequency for the primary. Thank you
Excellent explanation. Thank you. Great help.
I have always understood the 'Dual Resonance' part of a DRSSTC to be matching the inductance and capacitance of the primary circuit (which indeed, as you pointed out, should resonate at the same frequency as the secondary + topload + streamers) such that the impedance of the primary circuit consists only of the resistance of the coil wire and the ERS of the capacitors; the reactance is thus equal to (or nearly) zero. You pointed out that having your reactance too close to zero results in (often dangerously) high current, but didn't really mention the connection between this effect and the efficiency gains that this "dual resonance" affords. One way to "beat" (pun perhaps intended) the high current is to use an interrupter circuit to ensure that current does not get so high that it leads to catastrophic failure of the driver switches; one needs also to take precautions that 'zero voltage switching' occurs within the driver (or again, the switches - MOSFETs, IGBTs, etc. - will be destroyed).
I guess a top load is the only way to add capacitance to a slayer exciter then? Everything I've made has been in the mHz range and it's not easy on components. Things die when I put caps inline with the primary 😆
Well, yeah, as I say in the video, to decrease the frequency just add turns, or length, or wind on a larger diameter tube.....or add top load. Yeah for the single switch circuits like the slayer exciter and kacher, you cant put a cap in series with the primary. When running those circuits i always choose a very tough transistor.
@@ElectricMonkeyBrain I pretty much did all of the above today and ended up having a lot of fun!! Lit up a bunch of different bulbs and LEDs, made some cool sparks and arcs, and finally made something reliably stable to expirement with. I'm using a TIP3055 at the moment and it seems to be handling the abuse fairly well. I'll inevitably push it too hard but it seems to be a tough little fella so far, if it's even a genuine component lol
That chart to calculate the resonant frequency of a coil doesn't even come close! I put in the size and number of turns and it came up with 489 KHz but when I measure it I get 264!