COP 20.00 (2000%) Times, Reactive Power Energy Source Generator,

[Farmhand]

Well if you look at the wave forms it seems that if the switching was spot on (I think it's a bit off not important) but it seems
that the circuit simply takes "in phase" power "real power" to charge the caps, then dumps the energy so the resulting power is
out of phase and so energy is returned to the supply or it tries to. That energy didn't powered anything except the capacitor.

I hope you don't mind but I edited your scope shot to indicate current that is missing from the sine wave "in phase" and simply
returned "out of phase". Take in yellow and give in green.

I think the load power needs to be measured by a scope, I have a 60 Watt light globe it has 0.5 mH inductance.

Seeing if the calculated power from the scope traces matches the meter power will tell something.

Something to consider calculating below.

If the current trace was normal and in phase as it looks like it was then what is the power measured ? Then subtract the missing
"in phase current" and you get the load power. More than one way to skin a cat.

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[Farmhand]

Actually I think what is needed is-

1) A voltage, current and if possible a power trace from the supply line (grid supply to setup).
2) A normal load voltage, current and if possible a power trace from directly at and across the load.
3) A Switched Voltage, current and if possible power trace from the same load measurement points as the normal load power data.

4) Capacitor values, CSR values and so forth. Circuit diagram I think we already have so that is probably taken care of.

And all done in one session at the same running condition, if possible with no (on and off testing) different things unless a certain
run or warm up time is used the same always.

That should allow a decent analysis of the powers.

Maybe a comparison between the meters and the scope measurement analysis will yield the secret.

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[Farmhand]

Here's a wave form for an example it's an inductive load made to appear as almost purely resistive to the previous circuit element.
It's the primary of a ferrite transformer, the wire has less than 0.5 Ohm resistance about 7 turns of 10 Amp auto wire maybe a
meter at most. Anyway the voltage across the primary is in phase with the current through it so all power is real power.

I can make it look almost half reactive to the supply if I somehow take half of the "in phase current" and move it to be
90 degrees "out of phase" then the load power is reduced. And the wave forms are not sinusoidal so most meters probably
would not deal well with that. They might go to Zero in protest. Seeing double frequency and half of the current in phase and half
of the current out of phase. Might equal zero.

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P.S There is a yellow trace underneath the blue trace. Hard to see it.

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[Farmhand]

For example, if we take the same "in phase" wave form in my previous post. And ignore the purple trace. I modified it by drawing
in a "theoretical" SERPS current trace, we can see that it effectively doubles the frequency of the currents for each cycle compared
to the voltage. My drawing is a bit off but the reasoning can be seen. It also moves half of the current to 90 degrees out of phase.
Well that is the general effect of it I think, my scope edit is just a visual aid.

Now what effect does this have on a meter ? And the meters on the previous devices supplying the "SERPS" setup and load.

We should be able to draw a theoretical "proper" trace and determine the power that way.

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[listener191]

Hi Farmhand,

My old Owon scope doesnt help me much, have been looking at a Rigol DS1104Z, that has some useful math functions including integration of waveforms multiplication phase etc.

At the moment I have been trying the parallel charge, series discharge circuit but have only been getting a current waveform that is an in-phase chopped sine. The falstad simulator produces the same waveform so there must be something in the actual switches. Mario switches his MOSFETs individually and seems to be able to get the same waveform as Babcock and Murray have shown.

I know Mario is concerned about the half amplitude discharge pulse, and certainly the Babcock/Murray waveforms look more like 3 or 4 caps in series rather than two but anyhow, this technique does offer the possibility of switching some reasonable levels of power. The delay of the discharge pulses does work but is limited to 20 degrees or so of useful period, as the pulse has to be in a region where the voltage on the sine is less than that stored in the cap if current is to flow in reverse through the load.

Barry