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Showing results 1 to 25 of 357
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Search: Posts Made By: Spokane1
Forum: Renewable Energy 09-19-2016, 04:12 PM
Replies: 67
Views: 11,437
Posted By Spokane1
H-Bridge Logic Variation

Dear All:


Here is a simple variation to the logic circuit to generate the Phase B signal for the H-Bridge.

Spokane1
Forum: Renewable Energy 09-09-2016, 09:02 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Results of a single Switch system

Dear All,

I have been exploring the performance of the simplified single switch approach in building a Graham Gunderson system.

I have found that even though the primary voltage looks the same...
Forum: Renewable Energy 09-09-2016, 08:56 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Switching Components

Dear 3758,

I'm sure that whoever replicates this device will use the solid state switches they have faith in and those that they can afford. I'm sure the fundamental physics of this process...
Forum: Renewable Energy 08-25-2016, 11:10 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Junk Box Mockup Circuit

Dear All,

Here is the schematic for the circuit under consideration. Note this is a simplified approach and is not as advanced as the original Gunderson circuit, but it is a lot cheaper.
...
Forum: Renewable Energy 08-22-2016, 04:28 PM
Replies: 67
Views: 11,437
Posted By Spokane1
12 Volt Operation

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...
Forum: Renewable Energy 08-19-2016, 03:15 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Dear All, Here is the updated schematic, Lt...

Dear All,

Here is the updated schematic, Lt Spice schematic and a timing chart for the primary circuit for your use and pleasure.

Spokane1
Forum: Renewable Energy 08-18-2016, 06:27 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Gentlemen, Here is my take on the operation...

Gentlemen,

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

Comments Welcomed!

Spokane1
Forum: Renewable Energy 08-18-2016, 05:26 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Gentlemen, Folks disregard this drawing - it...

Gentlemen,

Folks disregard this drawing - it is missing some components - I shall repost an updated version below.

In my simulations of the H-Bridge circuit I have found that two of the MOSFETS...
Forum: Renewable Energy 08-14-2016, 04:27 AM
Replies: 67
Views: 11,437
Posted By Spokane1
MOSFET Gate Leakage

This 8 minute video is well worth the time. It is done by Mr. "Itsu". You can tell by the quality of his equipment that he is well funded for this sort of work. He is demonstrating the magnitude of...
Forum: Renewable Energy 08-11-2016, 11:06 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Dear Alan, You are correct on the drive...

Dear Alan,

You are correct on the drive voltage for SiC devices. Graham specifically used +12 and +10 Volts probably for example rather than actual values. Everyone is going to have to adjust...
Forum: Renewable Energy 08-09-2016, 04:02 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Synchroinous Diode Details

Dear Alan,

Graham actually has a dual channel isolated DC to DC switch mode power supply on the Synchronous diode circuit board, that is the purpose of the ferrite core in the center of the board....
Forum: Renewable Energy 08-09-2016, 04:51 AM
Replies: 67
Views: 11,437
Posted By Spokane1
Fly-Back Cores

Dear Smokey,

Common CRT Fly-back transformers (which are no longer common) are to small for this apparatus for now. We need a core that is 4" wide and has 1" square arms. Until we are sure we can...
Forum: Renewable Energy 08-09-2016, 04:32 AM
Replies: 67
Views: 11,437
Posted By Spokane1
Availibility of Barium Ferrite Magnets

Dear Smokey,

Barium Magnets were banned by OSHA because they claimed that some workers were suffering ill health effects from the dust that is created during their manufacture. Was there another...
Forum: Renewable Energy 08-08-2016, 11:27 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Synchronous Diode Component Layout

Spokane1
Dear All,
Here is a drawing of the Synchronous Diode Component Layout to help facilitate discussions about this sub assembly.
Enjoy!
Forum: Renewable Energy 08-05-2016, 07:35 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Gunderson System Schematic

Dear All,

Here is a system schematic to date.

Spokane1
Forum: Renewable Energy 08-05-2016, 05:13 AM
Replies: 6
Views: 4,015
Posted By Spokane1
Dear SilverToGold You are not being negative...

Dear SilverToGold

You are not being negative just practical.

There is not enough information in the video to build a device directly. There are no drawings, parts lists, wiring diagrams, or...
Forum: Renewable Energy 08-03-2016, 03:14 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Simulation

Here is my perception of how the circuit is wired and one possible implementation of an attempted simulation. I've only been into this a few hours. Also attached are some response traces to single...
Forum: Renewable Energy 08-01-2016, 10:01 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Logic Circuit

Dear All,

Here is another implementation (Bare Bones) of a Logic controller for the Gunderson Device. This one uses 100K trim pots and 1nF timing capacitors. It also gives a wide range of control...
Forum: Renewable Energy 07-29-2016, 03:30 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Logic Diagram

Dear Builders,

This is the system logic controller diagram to date.

Enjoy!

Spokane1
Forum: Renewable Energy 07-28-2016, 02:55 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Gunderson Logic Wiring Diagrams

Dear Builders and Measurement Specialists,

Here is my first pass at wiring diagrams for the Graham Gunderson Logic controller. There are two versions. One is the way things appeared to be wired...
Forum: Renewable Energy 07-24-2016, 09:22 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Let the Junk Box Replication Experiments Begin!

Let the Junk Box Replication Experiments Begin!
Forum: Renewable Energy 07-24-2016, 08:46 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Logic Board

Dear Builder,

Here is a first cut of dissecting the system's logic. I shall draft up an actual schematic at work. This may take a couple of weeks. Stay tuned.

Spokane1
Forum: Renewable Energy 07-22-2016, 11:19 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Block Diagram

Fellow Builders,

Here is a Version 1 Block Diagram we can use for discussion and improvement.

Enjoy!
Forum: Renewable Energy 07-22-2016, 05:21 AM
Replies: 67
Views: 11,437
Posted By Spokane1
Dear ewizard, Your bring up a good point....

Dear ewizard,

Your bring up a good point. The price is pocket change and there are companies that would like to bury it forever (If they thought it was real). I kind of doubt that any of them are...
Forum: Renewable Energy 07-19-2016, 06:46 PM
Replies: 67
Views: 11,437
Posted By Spokane1
Paper Review

That is some nice work, a good read. Some technical comments:

The output synchronous diode network is only activated for less than 10% (and probably less than that) of the full cycle time. The...
Showing results 1 to 25 of 357

 

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