Very High Current LC Driver

208

02:30:00

Puts Out a peak of 56 Amps @ 5 volts, yet only draws 2 Amps @ 5 volts from the source!!!  How is this possible you might ask?  By the Law of Conservation of Energy, the reason is because the watt-seconds (joules) in and out are kept the same.  If you want more current out than you draw in, then this means you’ll have to proportionally divide the time that it draws that peak current at.  A capacitor is crucial because a low voltage battery certainly won’t be able to supply anywhere near the amount of current we’re trying to achieve here.  A battery is made up of chemicals that have a much higher internal resistance than that of a simple capacitor made of just two plates of metal and a dialectic does.

published 4 years ago

jason9

4 years ago

I get “Cannot find solution” before this reaches a steady state. Also, I just posted a new circuit (funny that we’d both post at just about the same time). It’s a boost converter and also the first real life circuit I’ve made!

Issacsutt

4 years ago

Hey Hey that’s AWESOME, I’ll definitely check it out! Just curious, about how long were you waiting for it to settle? …Cause I tried doing that, and if I remember right, it takes an eternity it feels like, but the capacitor voltage also drops quite a bit, so it’s hard to find a compromise between the max current you want to draw and the duration of that current in order to maximize the peak high voltage resonance of the series LC.

jason9

4 years ago

Well I did also turn up the simulation speed to max, so that’s probably related. It crashed right as the blue line dropped below 5V.

Issacsutt

4 years ago

And yeah that is pretty funny cause I don’t think either of us have posted something in a while 😄

Issacsutt

4 years ago

Oh I just realized I never had a trace on the cool High Voltage oscillations coming from the series LC, did you ever get a chance to see that? It hits well over a hundred volts pk-pk

jason9

4 years ago

Oh I hadn’t noticed that before. Pretty cool, but it does mean you need a higher voltage rated cap and perhaps a tad of safety precaution.

Issacsutt

4 years ago

Haha yeah for sure 😅

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