Rene/Meissner EMF Higher Voltage Charger Variant

[SkyWatcher123]

Hi seychelles, thank you, well it is a very nice result so far, can't complain.

Are you referring to what is called, 'ultra capacitors' the ones that lasersaber used to replace his car starter battery.

I made another test cycle with the same input voltage and also checked the voltage and current at the start, middle and end of the discharge phase.
Then added those 3 values and then divided by 3 to get an average watt-hours used by the lithium ion battery pack.
Did the same with the charging phase and the efficiency came to 101.7% load test efficiency

I was getting a little better efficiency with the previous 20 volt input circuit, so i will try that next, using this lithium ion battery and see how the efficiency compares.
Am i surprised that the Coefficient of Performance is exceeding 1.0, I'm not surprised, because the collapsing coil field is recovering energy.
Your thoughts welcome.
peace love light    

[SkyWatcher123]

Hi all, here is the circuit that went over COP 1.
peace love light

[gyulasun]

Hi SkyWatcher,

I travelled for a few days and now am pleased to see your continued activity.
Okay on the 92.3% efficiency with the lead acid tractor battery,  Reply #61 and 62, it may have been with the 100 Ohm emitter resistor I suppose but whatever value it had the loss was surely negligible (some mW, maybe under 10 mW).

Regarding the charging of the 3 Li cells and the COP>1, this latter surely sounds unusual. You wrote it was because the collapsing field was recovering energy. I assume you mean that during the OFF time of the oscillator you add the captured energy to the normal charging current that is flowing during the ON time?
Well, okay but this was so in the case of the lead acid battery too, right? Or you meant otherwise, not as I assumed?

Anyway, my take on this so far is that very likely the charging efficiency of the Li cells can be higher than that of the lead acid type because the internal resistance of the Li cells are I think lower than the other type, so first of all the heat loss can be less, this is inherently inreasing overall efficiency.
Pulse charging Li type batteries is a not a deeply known process, at least not for me, unfortunately.

Would you mind telling the DC voltage drop across the 1.22 kOhm emitter resistor and what is the average charge current the 25V boost converter provides to the oscillator as input current?

Thanks, Gyula

[SkyWatcher123]

Hi gyulasun, thanks for the reply.
Yes, the same type of charging was applied to the lead acid and you are correct, the lithium-ion cells have less losses and no peukert effect losses.

The voltage drop across the 1,220 ohm resistor is 9.72 volts.
The average current is .15 A, from the boost converter.
Average voltage from booster is 24.85 volts, because it lowers to 24.8 by end and actually starts at 24.9 volts.
peace love light

[seychelles]

YEH SKY , ULTRA CAPACITOR OR EVEN BETTER THE NEW GRAPHENE CAPACITOR..