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High Efficiency Lamp Driver Back EMF Version.

#2
Thanks for the insight, Joel.

My question may probably sound stupid, but why is it needed to have a secondary capacitor (a capacitor bank in this case)? Why didn't you use the first capacitor as a source for the inverter? Why didn't you use just one capacitor bank as the first capacitor?

My confusion comes from the following: You have a very low 10 Hz frequency while the output lamp does not flicker which means at the end you have enough power for each impulse for the lamp which is usually at least 40-50 Hz.

To me it sounds like you are filling a bucket of water for 1 second and then you are pouring it into a container that has a volume of 6 buckets but your load requires pulses of 4 buckets every second. Your example works which means my math is probably wrong. I've tried to discharge one capacitor into another and the difference is the higher current I get from the discharged capacitor which charges the other one in an instant. T. H. Moray says that he discharges capacitors into others, but I still can't see what's the advantage besides the quicker charge time.

Again, sorry if my question sounds too stupid.

By the way, I've tried to use a simple Tesla transformer output by rectifying it, storing it into a capacitor and discharging it through a gas spark gap (I'm using a 90 V arrester like this one: https://ae01.alicdn.com/kf/HTB1odbyafjsK....jpg_.webp ). The discharged current goes through a small 5 W incandescent car light bulb. It flashes from time to time, but the frequency is rather slow (once every 4-5 seconds). The Tesla transformer was deliberately low powered (9V; 80 mA) in order to see how much I can squeeze out of it. The voltage was about 1.5 kV. I've ordered a few neon lights to see if discharging through them would be different.

I'm probably comparing apples to oranges right now, because with the Tesla transformer I got almost no current and a sinusoidal wave (but at very high frequency) while with the back-EMF peaks there is more current, even though the voltage is much lower (100 V in your case). The higher current is probably the difference.

I'm still wondering why you didn't discharge the first capacitor through the invertor but used an intermediate capacitor dump which was with a very low frequency.
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RE: High Efficiency Lamp Driver Back EMF Version. - by tihomir - 04-25-2023, 07:09 AM

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