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

[listener191]

Hi Mario & Farmhand,

The rheostat was a convenient high power resistive load, which by its construction, has some inductance.

I have tried two parallel 50W light bulbs instead and it does not change the waveform and does not change the readings on energy monitor i.e. still 31W 0.31PF  95VA.

Have also used 1:1 transformer to isolate my source and placed the energy monitor on the input to that transformer and got very close to same i.e. 31W 0.31PF 95VA

The PF displayed is purely due to the cap switching.

With regards to the load is their some specific measurement you would like me to make?

The AC voltage across the load reads 68V and 0.172A through the load via a true RMS meter.

My current clamp is showing  1A pk to pk.

@Mario,

Re MOSFET failures. I am using P12NM60 MOSFETS which at a VDS of 160V allows about 1.5A continuous to stay in its SOA. I was pushing higher than this at several times during testing so it may well be going outside the SOA. Thanks for making me look at this. I will change to IGBTS at some point to provide some useful current capability and keep the current down for now. I am still using 60uf Non Polarized caps. I guess you are only using low voltage and car bulbs?

Attached is latest SERPS timing rev that allows individual MOSFET switching without adding two more pulse width monostables. As you can voltage control timing clock the additional LTC-6993C-3's may be far neater, as then you can remove the falling edge detectors and the NAND RS latch and all the buffers, inverters and XNOR gates.

The resistor values indicated plus the 470K pots, give a good timing range.

I appreciate any suggestions and happy to make any measurements

Barry

[listener191]

I should mention the cyclic RMS current measured on the scope is 0.2A, which inconsideration of the waveform is fairly close to 0.172A measured by the meter in series with the load. So power is somewhere between 11 to 13W in load.

31W & 95VA shown on the input from source.

Babcock and Murray claim 1W input from source and 52W in load?

Maybe need to have measuring setup for load power running same time as input measurement i.e. side by side, to determine if there is any 'sweet spot' adjustment?

Barry

[popolibero]

Hi Barry,


thanks for posting all that. We have to keep in mind that the claimed 1.1W input is the differential of the power they take from the grid and the power they give back. t's not simply that the transformer shows 1.1W consumption. I don't remember if they say the numbers, but let's say that for one moment they take 100W from the grid and the next they give 98,9Watts back. The net result is that you pay for 1.1 W.
Now, I don't know if a little power meter can calculate that differential, but since you asked if I wanted you to take some measurements I would like to suggest you put a 0.1 resistor shunt in series with the transformer secondary (or primary) and put your scope across the resistor. This is what they did in the attached picture. If the positive amps are about the same as the negative amps you know that you are returning about the same power you are taking, and since your bulb is lit you know you're in the ball park.
You will not be able to measure a low consumption on your audio amp, because it's not a generator and it doesn't know how to handle the power you send back. If you had a generator as a source it would convert the energy you send back into motive force making the generator become a motor for a moment. This means it would be a generator without drag on the prime mover, and this while running the load.


P.S. Could replace that big picture you posted with a smaller one? It makes reading this page a bit difficult, thanks 


regards,
Mario

[listener191]

OK not sure if this will replace oversize photo. This one has all MOSFETS working .

Also attached is a photo of the light bulb load and a power meter monitoring load power only.

This was a meter I designed for monitoring generator outputs hence the RPM display and is arduino based. It has an RS-232 output that can be used for data logging and has isolated monitoring.
This one works down to fairly low voltages where the energy meters peg out below 90V or so.

I noted that the software needs a tweak to limit rounding to avoid the PF >1.00 situation.

Barry

[listener191]

All,

In the Murray Babcock presentation time 01:28:45,  Babcock states that in substituting a generator with a transformer, the transformer eats up the returned power. This is indicating that a practical SERPS device cannot work on a transmission line system with transformers.

It would seem that to see this device work, it will have to be placed on a generator!

Barry