caps and diodes and relays
Hi Rick,
I have a very simplified idea for the car but don't have a sketch yet.
For the diodes, I have some great input from a few friends. I ordered some 15kv 550ma diodes for temporary use just to get back in the game from blowing out all the others. lol
I can probably get a handful of very big bangs from the plug with those until they blow so I have to watch it...basically I just want those to be able to just study the bare basic spark. I've seen what over 1000 volts as a booster cap bank will do...charged from a microwave power supply and basically the sky is the limit with the spark as long as you have diodes to handle it. How to get a spark "100 times" bigger than the basic single little cap spark? That is very easy to do with this cap booster method...but again...just need a diode solution to handle it.
An inverter timed with some relay solution that S1R shows in his diagram is hard to figure out with his drawing. I can trace the arrows but what I keep coming to as the bottom line is that the inverter output and ignition coil output meet at the plug synchronized. So with having a bare bones cdi (capacitive discharge ignition)...just a cap dump to the coil instead of 12v pulse, and that hv output meets a hv diode leaving a cap bank charged with a variac or inverter...timing issues go away...because as long as the cap bank is charged up fast enough...anytime the initial cap dump on the primary happens and that hv output goes out to the diode...stuff happens automatically timed and I think the whole relay deal is unnecessary unless there is more than meets the eye.
On S1R's relay diagram, he shows single diode leaving one ac line and one single diode coming back on the other ac line...so that is pulsed dc at only 60hz instead of full rectified 120hz pulsed dc. Everyone that I have seen so far is doing a full bridge from an inverter or whatever trying to duplicate S1R but that doesn't have anything to do with what S1R shows in his relay diagram. Check out the relay diagram...it will be half rectified so it is only 60hz dc. On an inverter it will only catch the top half of the modified sine wave leaving it.
Is there a reason for this that is beneficial? To save money on diodes? To slow down the pulses to make the timing work better? Is it the only way S1R knew how to make the AC into DC? etc...?
On each cycle and there is probably only 1 cycle worth of contact of the inverter with the ignition coil output at each time...that means there is about 4-5 joules of energy per pulse being added to the hv output of ignition coil. That is if there are around 400-500 watts at 115v or 160v peak.
Now with lower voltage higher capacitance...same thing...can keep it at about 300v range but just make the cap bank larger capacitance...serious big sparks...but same thing...need diodes to handle the surges.
Hi Rick,
I have a very simplified idea for the car but don't have a sketch yet.
For the diodes, I have some great input from a few friends. I ordered some 15kv 550ma diodes for temporary use just to get back in the game from blowing out all the others. lol
I can probably get a handful of very big bangs from the plug with those until they blow so I have to watch it...basically I just want those to be able to just study the bare basic spark. I've seen what over 1000 volts as a booster cap bank will do...charged from a microwave power supply and basically the sky is the limit with the spark as long as you have diodes to handle it. How to get a spark "100 times" bigger than the basic single little cap spark? That is very easy to do with this cap booster method...but again...just need a diode solution to handle it.
An inverter timed with some relay solution that S1R shows in his diagram is hard to figure out with his drawing. I can trace the arrows but what I keep coming to as the bottom line is that the inverter output and ignition coil output meet at the plug synchronized. So with having a bare bones cdi (capacitive discharge ignition)...just a cap dump to the coil instead of 12v pulse, and that hv output meets a hv diode leaving a cap bank charged with a variac or inverter...timing issues go away...because as long as the cap bank is charged up fast enough...anytime the initial cap dump on the primary happens and that hv output goes out to the diode...stuff happens automatically timed and I think the whole relay deal is unnecessary unless there is more than meets the eye.
On S1R's relay diagram, he shows single diode leaving one ac line and one single diode coming back on the other ac line...so that is pulsed dc at only 60hz instead of full rectified 120hz pulsed dc. Everyone that I have seen so far is doing a full bridge from an inverter or whatever trying to duplicate S1R but that doesn't have anything to do with what S1R shows in his relay diagram. Check out the relay diagram...it will be half rectified so it is only 60hz dc. On an inverter it will only catch the top half of the modified sine wave leaving it.
Is there a reason for this that is beneficial? To save money on diodes? To slow down the pulses to make the timing work better? Is it the only way S1R knew how to make the AC into DC? etc...?
On each cycle and there is probably only 1 cycle worth of contact of the inverter with the ignition coil output at each time...that means there is about 4-5 joules of energy per pulse being added to the hv output of ignition coil. That is if there are around 400-500 watts at 115v or 160v peak.
Now with lower voltage higher capacitance...same thing...can keep it at about 300v range but just make the cap bank larger capacitance...serious big sparks...but same thing...need diodes to handle the surges.
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