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Thread: Branch's NEW Solid State SG

  1. #11
    Senior Member Branch Gordon's Avatar
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    Yeah I have been meaning to take those out...it was on my rotor SG before. They are glued in so I'm gonna have to do a little hammering I think. I think I'll try and work on that tonight, so I can compare tomorrow.

    I didn't realize they would be slowing the whole process down...so that is good info. Thanks man!

    Quote Originally Posted by Tom C View Post
    the hysteresis in the core of the coil with the rods in slows it down. take the rods out and watch the change, it will cycle much faster. you should be switching in the Mhz range. it will charge better. you can tune it by moving rods in and out or changing the rod overall diameter.

    Tom C

  2. #12
    Senior Member Branch Gordon's Avatar
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    I took out the core last night and the machine runs very different this morning. Cap is under control now and I have less heat. Good stuff.

    Quote Originally Posted by Tom C View Post
    the hysteresis in the core of the coil with the rods in slows it down. take the rods out and watch the change, it will cycle much faster. you should be switching in the Mhz range. it will charge better. you can tune it by moving rods in and out or changing the rod overall diameter.

    Tom C

  3. #13
    Senior Member Branch Gordon's Avatar
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    It's been mostly sunny today so I've had a chance to become more familiar with how this thing runs at full power. What I'm seeing is that I really have to ride the POT all day. What I mean is...this morning when the sun was just coming up, I raised the resistance to get the cap voltage up to around 12V. As the sun got higher in the sky, I had to lower the resistance otherwise the cap voltage got too high.

    So as it's getting into late afternoon, my cap voltage is dropping to around 9V which isn't providing very good charging. So I start raising the resistance again to compensate.

    So two questions: Is this the way to do it? Should I ride the POT, or should I just set it at the resistance that works for the most sunny part of the day and leave it there?
    And question #2: Is there a way to have a POT that automatically adjusts itself based on a voltage reading from the POT?

  4. #14
    Senior Member jelloir's Avatar
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    Bit of a hijack here sorry people but I have a question about Solid State SSG vs. rotor SSG... I will potentially have about 30 second hand 8V 170AH Trojan Golf cart batteries to attempt to rejuvenate for a 24V bank (potentially 1700AH). Because they are 8V this means using my SSG Radiant to rejuvenate them.

    I am thinking of building another SSG to speed things up. After seeing Branch's build I'm wondering if I should go Solid State for my next build? 10.33v is what Trojan state as the "equalization" voltage or what we would call topping voltage (e.g. 15.3v for a 12v) I managed to push the first battery I'm rejuvenating to 9.54V and stopped as it was bubbling away quite a bit, so that could simply be it's as high as it can go until I cycle it a few more times... or it could be as high as my SSG can push it... I won't have answers to that for a while as it takes days to charge.

    Anyway, What is typically better for rejuvenation, Solid State or Rotor? I figure if I build another rotor it will also give me another chance to try and get COP>1, but if a solid stage SSG is more practical for rejuvenation then maybe I build that instead, plus learn something new

    Thanks

    James

  5. #15
    Senior Member Branch Gordon's Avatar
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    I've been charting the past few days as my Trojan T-105 charges up from this panel and SSSG.

    chart.jpg

    You can see the first day was partly cloudy, as was today. Past two days were great. Pretty fun to watch, and I definitely get excited now about sunny days.

    I have the resistance up so that it is only pulling 1.5 amps into the machine. Anything extra just pushes the cap voltage higher.

    I would like to implement the mod that min2oly describes at 2:30 in this video

    On this thread in the forum, John describes almost exactly the same setup as me: http://www.energyscienceforum.com/sh...?t=1801&page=3

    And then min2oly responds with the circuit schematic. Has anyone else built this or had success with it? I am thinking of trying it.

    Patrick's-CPD-Mod(1).jpg

  6. #16
    Senior Member Branch Gordon's Avatar
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    Is it ok for a big battery like this to charge in small chunks over a period of two weeks?

  7. #17
    the cpd mod schematic you posted works amazing, mine doesnt use a bridge though just diodes like normal.... also i have a 100 ohm resistor(20w) connected to to pot so it cant go lower than 100 ohms... my pot personally gets pretty warm (5w) so a rheostat might be nice to use if you have pot burning out troubles

  8. #18
    Senior Member Branch Gordon's Avatar
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    Thanks Brodie! My cap arrived yesterday...and I think I'm gonna buy a rheostat like you are suggesting.

    Quote Originally Posted by Brodie Gwilliam View Post
    the cpd mod schematic you posted works amazing, mine doesnt use a bridge though just diodes like normal.... also i have a 100 ohm resistor(20w) connected to to pot so it cant go lower than 100 ohms... my pot personally gets pretty warm (5w) so a rheostat might be nice to use if you have pot burning out troubles

  9. #19
    Senior Member Branch Gordon's Avatar
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    I'm looking to build another SSSG, but really beefed up. My current board runs great off of my 45 watts of solar, but it's just taking WAY too long to effectively charge up my 225AH battery, let alone a larger bank. I want to build a board that can handle 30-40 amps.

    I'm looking for suggestions on components and wiring. Obviously I will need thick wire. I looked up the specs on the transistors and they seem to be able to handle a lot of current. I don't want to use a cap dump or anything...just straight radiant. CPD mod.

    Alternatively, I've considered using my solar tracker to charge up a big lead alum converted battery, and then using that to charge up a large bank, considering they are supposed to last a lot longer running oscillator circuits.

    Would love to hear your suggestions/ideas.

  10. #20
    Senior Member Branch Gordon's Avatar
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    I've noticed some interesting things on my scope while running my SSSG. Thought I would share via video. Check it out:


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