An energy harvesting project

[Gary Hammond]

Hi Julian,

Thanks Gary for all that. I tend to run in Generator or Common Earth mode so the max RPM for min current is what so have been doing. Still haven’t got a battery above about 13V though . . . . .

The battery size needs to be favorably matched to the size of the SSG. This means small batteries for a small machine with a single power winding on the main coil. I have a small SSG I started as a replication of Shawnee Baughman's little machine shown in the beginners handbook. I had trouble getting it to not blow the transistor, so changed a few things and got it working very well with a MJE3055 transistor, 2.75" diameter rotor, 1.5 x 1.75 coil, and 5.5 AH 12 volt batteries. It will easily push the charge battery over 15 volts in probably less than an hour. Here's a link to a video of it running on the battery swapper I made so you can see the relative size of the SSG in comparison to the batteries. https://www.youtube.com/watch?v=DE-CvurRW5U

Gary Hammond,

[JulesP]

Hi Gary,

Yes, I have tried using a variety of sizes from 2.5, 5, 7,16, 40, and 110Ah with every build I have made and still never got the battery over about 13V.

My present system (V5) is a 4 winding + trigger coil and 4 generator/recovery coils and is giving the best CoPs around 0.9 (total energy out/total energy in) with both the 16Ah fluid motorcycle battery and the 40Ah car battery, but still never goes above about 12.9V.

However, it seems that reaching those voltages is not a prerequisite for getting OU, but of course, it will have long-term effects on the levels of sulphation.

I will be seeing what effect making the negative lead to the battery a direct connection and not going via a connection hub. I found that made a difference on the positive lead and where lumps of metal may interfere with the surface flow of energies.

I attach a charging profile from my BD1 setup (effectively an SSG) which is with just a single power winding and a trigger winding. This reached 1.15 but I have not yet done consistency tests.



It seems that the most important factor is keeping the current down (hence my earlier query regarding adjusting it) and with this trace was at 0.26A (I recall JB saying to keep the current at this sort of level). The thing is that with more windings the current goes up proportionately, as expected, but the charging effect does not increase by the same factor. This means that in fact, a two power winding coil will likely do better overall than a 4 winding one since the supply current is lower. In fact, with my V5 with its 4 windings, I get a better result if I disconnect one of the windings. So running with 3 coils instead of 4 reduces the supply significantly but does not drop the charging by the same amount. So far with this, I have reached 0.9, but there are a lot of alternative options to test yet.

I do have to wonder if my living on top of a huge peninsula of granite, in far west Cornwall, may be affecting the local ether! As you will recall, Rodolphe, who has replicated my V4 setup using a PWM, regularly gets around 15V with a 12Ah battery. So far we haven't made sense of this situation.

Regards,

Julian

[pearldragon]

Hi Julian,

This week finally started up my Bedini SG again. Started out with some measurement with PSU at the input: Scope shots looked weird. Switched to using a battery at the input and the scope shots started to look as I remember them.

In the attachment you can find some of the scope shots. The scope shot with the PSU at the input had some resemblance with the 2^nd image of the 4 scope shots you showed in our zoom call, hence the post here.

Regards,
Rodolphe
Post nr 153 - Scope shots - 2023-12-01.pdf

[JulesP]

Hi Rodolphe,

Thanks for the scope shots. They clearly show the double pulse as has been reported on before.

Pulse Shapes

The pulse shape with the PSU input and the MJL (that I assume you are using with the SG) is reassuringly similar to what I got and so this suggests that it is the role of the battery in SG mode that introduces the second pulse. I have not tried SG mode while I am using a PSU for fear that it might damage it since it won’t respond well to an HV pulse.

Also the ‘typical’ pulse shape that has been explored in the forum would appear to be specific to using a battery as the supply and not a PSU, and probably also Generator mode since the double pulse that SG mode seems to elicit is not showing.

In the pic below my pulses on the right, generated using a trigger coil and the MJL21194, is quite different than the typical Bedini type on the left.



As a sideline, I am working with another to explore how to replicate the ‘traditional’ pulse shape of an SG (with a battery for supply and not a PSU) by solid-state means. This would make a build easier but it means unpicking exactly how the pulse shape derives from the various capacitances and inductances in the circuit and with the contributions from the supply battery itself, particularly on ‘radiant’ mode, to the electrostatic pulses.



The collection of pulses above suggests that the ‘h’ shape is a feature of the interaction between the trigger coil and the other windings and rotor magnets. Perhaps it is this ‘h’ shape that is an indicator of the better charging rate per unit CoP compared to using a single winding coil and a PWM trigger, even though I have found both to be able to give a CoP>1.


Sniffer Coil

How does a sniffer coil compare with a Hall probe sensor for use with a scope?

Looking at the current waveform at the charging battery is of interest. Below is the waveform measured with a Hantek current probe placed around the negative wire of the charging battery. The supply current to the system is a bit under 500mA and yet, the average current at the charging battery is peaking at around 2A and let’s estimate it at also around an average of 500mA.

So despite all the recognised losses occurring in the device, we are still delivering to the charging battery a current similar to what is entering the device from the supply. This should indicate that something additional is happening to cause this and that is offsetting all the regular losses.

I will be looking at this and other CoP issues (max so far with current limiting and solid state option on V5A is just under 3) in the developmental report I will do for the forum around the end of the year.





Meanwhile, there is a ‘developmental blog’ on some of the improvements in preparation for the research study, starting early next year, at: https://osf.io/ztfub/wiki/home/

For those who are unaware, details of the proposed research, and links to the OSF, are all presented on the 'Current Research' page of my site at kerrowenergetics.org.uk

Also, I have submitted an article to the Journal of Scientific Exploration entitled ‘Inductive Pulse Charging: What, How and Why? This lays out the historical and technical foundations for the subject. I consider it a ‘scene setter’ for those who are unfamiliar with it - i.e. most of the scientific community. If it is accepted then, as soon as I receive the online version, I can post it here and allow it to be passed around.

I will be summarising recent developments and findings in an update report around the end of this year for the forum and show the data for the various OU CoPs with both rotor-based and PWM-based measurements.

Julian

[pearldragon]

Hi Julian,
The signal can be a quadruple, triple, double or single shape. Depending on the base resistance and the input. I cannot get single shots with a PSU as input, but I can with a battery as input. Apart from that, both all signal I can generate in the same way regardless of PSU or battery input.

I write this quick post here to share a test that I did today, which is part of a whole set in which I research different parameters and their impact of the Bedini SG in Radiant mode.

What I noticed is that in the test from yesterday, I say that the h-shape signal ‘straightened-up’ quite a bit compared to the h-shapes that I shared in post #153. Also the auto scale changed from +/-200mV to +/-10V on my scope… After doing some re-testing of previous tests the only conclusion for now I can draw is that the straightening up of the signal is a result of battery conditioning!!!

Regards,
Rodolphe
Post 155 - Test R231206 - 2023-12-04 - V1.03.pdf

[JulesP]

Hi Rodolphe,

It is interesting that you cannot get a single pulse with a PSU as input whereas I always do. I haven’t done much testing recently using a battery as input, but which I would need to do for SG mode of nothing else. These tests are in the pipeline.

I’m not clear what the precise requirements are to get 2, 3 and 4 pulses per magnet pass with a SG or a related system.

When you get around to replicating the series coils with the v4 and PWM, you should find only one pulse/pass.

In a related issue, the use of generator coils will allow LEDs to be lit, with either a higher voltage or current output depending on the generator coil design and configuration, but from the few tests I have done in this area, using them requires extra supply current with the additional load on the rotor, and this will bring the overall CoP below one as the inductive pickup is inherently of low efficiency and there is nothing in the inductive pickup process to compensate. The only expectation would seem to be when the main coil CoP is sufficiently above 1 to compensate for the generator coil system inefficiencies as well as others in the main system.

Julian