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Author Topic: Graham Gunderson's Energy conference presentation Most impressive and mysterious  (Read 65665 times)

Offline Spokane1

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Thank you Spokane1 !

May I ask why why do my messages not appear? You replied to me but my original message is not on the thread and my status says that I have zero posts. Thanks!

Dear Smann,

That is odd. Your post showed up quite normally on my machine. Then again I've been given some moderator control buttons to use (which haven't been needed). I shall ask Chet K. he seems to know a lot about these things.

Spokane1

Free Energy | searching for free energy and discussing free energy


Offline ramset

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Spokane
His original post is #295 ...its there ,he must have missed it??
you can remove this post if you wish .

OH
and Congrats on the promotion !!

respectfully

Chet K

Offline citfta

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Thank you Spokane1 !

May I ask why why do my messages not appear? You replied to me but my original message is not on the thread and my status says that I have zero posts. Thanks!

Smann,

Your posts appear to be normal for me also.  Your post asking about GG seems to be normal to me.  And your posts after that also.  According to what I see you now have 6 posts total.

Carroll

Offline Spokane1

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Gentlemen,

Folks the drawing that was posted here this morning has some missing components this is a better version.

In my simulations of the H-Bridge circuit I have found that two of the MOSFETS are not active therefore making them unneeded. Upon further examination I have found that the entire H-Bridge can be replaced with one switch and a diode. The input to the primary of the Gunderson Transformer is the same in that it produces the same voltage and current wave forms with far fewer components.

k4zep made additional simplifications by proposing that the switching elements be placed on the low side of the circuit to better reference driver connections. This circuit variation also simulates the same as a full four element H-Bridge.

Graham said 7/18/2016 that he was planning to redo his H-Bridge with a two switch design. He also said that providing schematics to his demonstration device would be pointless since he was planning to re-do all the circuits. Both statements seem to be correct.

Anyway, here is the proposed simplified circuit. The elimination of three switching elements should reduce the gate leakage issue by 50%.

Does anyone see any issues with this design and why it might not work as good as a full H-Bridge in this application?

Oops the polarity on the 220 VDC power supply is backwards.

Also pardon for the large jpg capture. My computer crashed yestserday and I'm running in safe mode and have no access to my photo re-sizing tools. I have two job tickets into the company Help Desk.

Spokane1
« Last Edit: August 19, 2016, 02:15:15 AM by Spokane1 »

Offline Spokane1

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Gentlemen,

Here is my take on the operation of the Synchronous Diode.

Comments Welcomed!

Spokane1

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Offline hartiberlin

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    • free energy research OverUnity.com
Thanks for all the hard work the users are doing here in analyzing the Gunderson MIT.

Great progress so far.

Well, I will join in a few days, cause I am still stuck in some tax work and flat renovation.
When I am done with that I will also buy the MIT conference movie and analyse it.

Well, here are all the latest movies so far released from the conference.

I would be glad if you could support overunity.com by getting and buying these
movies via these affiliate links ( you donĀ“t pay more), as it helps to pay the hosting fees and maintainance work
and upcoming sites I am working on.

Many thanks in advance. Best Regards, Stefan.

2016 ENERGY SCIENCE & TECHNOLOGY CONFERENCE VIDEOS RELEASED SO FAR:

Magnetic Implosion Transformer by Graham Gunderson - http://www.emediapress.com/go.php?offer=harti&pid=14
Moray B. King: From Nanobubbles to Ball Lightning: http://www.emediapress.com/go.php?offer=harti&pid=85
Babcock DC Motor Disclosure by Paul Babcock: http://www.emediapress.com/go.php?offer=harti&pid=33
Cold Electricity by Aaron Murakami: http://www.emediapress.com/go.php?offer=harti&pid=41
Fundamentals of the Transforming Generator by Jim Murray - http://www.emediapress.com/go.php?offer=harti&pid=21
Open System Physics & Thermodynamics by Mike Waters - http://www.emediapress.com/go.php?offer=harti&pid=39
Bedini SG - Beyond the Advanced Handbook by Peter Lindemann - http://www.emediapress.com/go.php?offer=harti&pid=10
Electrical Transmission in Multiple Coordinate Systems by Eric Dollard - http://www.emediapress.com/go.php?offer=harti&pid=59

Offline Spokane1

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Dear All.

Here is my take on the Primary circuit timing sequence.

Spokane1

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Offline Enjoykin2017

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There is a video on youtube somewhere,that shows the meter on the house spinning backwards when the guy uses his arc welder.
Wonder if he is saving money while welding?.


Brad

Hi tinman

I want to see that video. Would you like to post link here??
What is very interesting for me is arc welder and LCD-screen monitor anomaly !! Something strange has happened with liquid crystals !!

Thanks !!
Enjoykin

Offline Spokane1

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Dear All,

This weekends work showed a little promise. I was able to get the junk box mockup circuit to lock into the proper timing sequence to display the discontinuous sine wave. I just have the primary circuit operational. This evening I shall add the synchronous diode circuit and start to get a look at the backend operation. For what its worth this circuit shows:

1. This circuit will function at 12 VDC (using the single switch approach)

2. Operation can take place as low as 3.2 kHz

3. A classical laminated iron core  will support the novel oscillation pattern.

None of this means that we are in the OU window of operation, but it is nice to see some hardware implementation of the circuit under discussion. Using the component parameters I have in the actual circuit the simulation shows that I might be able to harvest up 6.5 Watts at a COP of .863. I'm sure the real world performance will be far less than this.

The advantage of the 12 V approach is that all the excitation energy comes from one source. All the gate losses, skew losses, and magnetic probe  interference issues can be evaluated. If this circuit can perform as a self runner then this is the direction to go.

The simulation also shows that the circuit performance improves if I were to use a smaller charging inductance choke. The junk box device (from a salvaged X-Ray transformer) has a 1 KHz inductance of 11.5 mH. The simulation shows that I need a 2 mH unit there. Grahams circuit apparently used a .0324 mH custom device.

If any one is interested in a schematic for this temporary evaluation circuit let me know. I'm sure there will be several variations employed as the circuit technique improves.

Spokane1

Offline TinselKoala

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Looks nice Spokane1! Love the LeCroy.

Are you using readings from that green current transformer in your calculations? Have you corrected for any phase shift in the current transformer readings?

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Offline Spokane1

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Looks nice Spokane1! Love the LeCroy.

Are you using readings from that green current transformer in your calculations? Have you corrected for any phase shift in the current transformer readings?

Dear TK,

"Oh Great Master of Measurement bestow upon this humble and unworthy novice the secrets of professional analysis. Show me the path to accurate and meaningful evaluation of the True and Pure knowledge of Performance. I have only my hands and a few crude tools to sacrifice to this higher cause."

I haven't used any of the observations for calculations nor have I corrected for any phase shift since I don't know how to do that. I was busy just attempting to get the circuit to run. The photos are from last Sunday evening and are of the primary circuit only. Now I have the secondary circuit operational and can actually harvest a little on the back end. After making adjustments and changing gate resistors I was able to collect a whooping 1.75 V across the output capacitor using a Harbor Freight DVM.

The next step is to add some additional wide band current transformers on the secondary in two places to see what might be going on there and how the harvest circuit works.

I did notice that once I started to harvest secondary energy that my tank voltage became lopsided with the initial negative swing being larger than the following positive swing. (No photos since I left my cell phone at work). Also the current trace is not very close to what Graham had, then again I'm glad that this circuit functions at all.

I just purchased a new Import LCR meter and the instruction book is all in Japanese or something, so I can't follow the calibration procedure. So, I'm not sure my static inductance measurements of the transformer are correct or not. Also I need to do some DC resistance measurements of the transformer since there is significant losses there, much more than what Graham had with his huge Litz wire windings.

Anyway this is a place to start.

Spokane1



Offline TinselKoala

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Looks good as always! I'm really glad you are using the logic board rather than an external arrangement of FGs.

As far as the phase shift of the Pearson current monitor, here's some info from Pearson:
http://www.pearsonelectronics.com/phase-shift

And from another site:
Quote
Phase angle errors are more complex. The current transformer introduces a phase shift (or time delay) in the AC current signal, relative to the actual current. This is commonly measured in degrees and varies from 0.2 degrees (or better) for highly accurate CTs to as high as 6 degrees. At and near unity power factor, CT phase angle errors have little effect on the measured power and energy. However, at lower power factors, such as 0.7 or below (especially below 0.5), even small phase angle errors can cause large errors in the measured power and energy.
(emphasis mine)

Correction will involve using the scope's "deskew" or channel delay function to compensate for the phase delay of the CT. Measuring the phase delay in order to cancel it by the delay setting would involve taking a Vdrop measurement across a known noninductive resistance with a Kelvin-type probe arrangement and comparing that with a simultaneous measurement from the CT in the same current loop, done at the operating frequency range of interest.


Also... the mosfets. The IRFPG50 is slow and has a high resistance of 2 ohms when fully on. I've done a lot of work with that particular mosfet... heh heh... and I don't think I'd want to use it in a high-frequency H-bridge or an energy harvesting circuit.

I'd be tempted to try IRFP260n instead, since you are operating at relatively low input voltage. Just to see if they can take the strain....    8)     

Offline Spokane1

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Also... the mosfets. The IRFPG50 is slow and has a high resistance of 2 ohms when fully on. I've done a lot of work with that particular mosfet... heh heh... and I don't think I'd want to use it in a high-frequency H-bridge or an energy harvesting circuit.

Dear TK,

I figured as much for those MOSFETS, But the price is right when you have them on hand. These will probably be the first things to go as I get this circuit going as good as it is going to get using an iron core. At 3 kHz their slowness is most likely not going to impact a basic understanding of what is going on. Right now I believe that we have at least three proposed approaches for a harvesting protocol. This circuit might determine which is best.

As far as measurements go, can't we just measure the usable energy in and the usable energy out and dispense with Kelvin probes (which I probably can't afford). I have placed a current sensing resistor at the battery. Is there some method that you would recommend where I could see how much power is coming from the battery and compare that to how much power is being consumed by the load?  To me what happens in-between is not all the relevant to our goal. (except for engineering judgments) Both ends are fitted with large smoothing capacitors.  An accuracy within 5% would be good enough for me. If this system can't produce a COP of at least 5.0 then it is probably not going to have much commercial value anyway.

Dealing with AF and DC mixed for measurement purposes with $5 DVM's is not my forte, but it is probably what most researchers have to work with.

Spokane1

Offline Spokane1

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Dear TK,

Here is a measurement question for this morning. I'm attempting to observe the secondary current in my iron core transformer.

I'm using a Pearson Model 6164 Wide Band Current Transformer that has a sensitivity of 0.05 Volts / Amp. It is a 50 Ohm device so I set the scope input parameters to this. I projected that there was not going to be much current to observe so I wrapped five (5) turns of the secondary lead around it and reconnected it. The transformer leads are about 16" long to start with.

What I observed was not expected since none of my simulations displayed the response. The red trace is the observed current amplified by about 5X. The green trace at the bottom is the harvest pulse. In this case it is about 3 us long since this is about as fast as my slow MOSFETS can go. As you can see a large ringing effects is noticed. The frequency of this decaying burst is about 166 kHz. I really doubt that the core could respond that fast - if at all. This means that the ring must be coming from the current probe or the transformer winding.

The yellow trace is the primary current.

Is this real or a measurement artifact? If it is an artifact then how do I get rid of it?

I have set my harvest pulse to take place when the secondary was at peak current, however the $5 HF DVM goes to almost zero as I approach the peak. Perhaps because more AC is being produced rather than DC.

Also it appears that I can afford those IRFPG260n MOSFEt'S you recommended since they go for about $1.50 each in lots of 20 on eBay with free shipping. I have a batch of them coming in next Monday.

Thanks in advance for the advise.

Spokane1

Offline TinselKoala

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Well.... hmmm.

Now I'm confused. In previous posts you've said that the harvest pulse is turning the mosfets _off_ for a very brief time (see the diagram attached below) but now your mosfet Gate trace (CH4) looks like it's going HIGH and turning the mosfets _on_ for a very brief time and leaving them off for the remainder of the cycle.

So is the substantial current you are reading here, actually going through the mosfet body diode? What am I missing here?

What is that 50R, 10W load resistor? Is it a wirewound resistor?

Yes, I'll bet that ringing you are seeing is a "real artifact" in the sense that it is really happening but is something you don't want happening and may be caused by stray inductances due to wiring length or maybe the inductance of that load resistor.


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