So my partner in Sacramento tested the output of the two coils both loaded and unloaded. Unloaded they put out around 300 volts, but loaded, one coil put out 85 volts (2820 RPM) and the other one put out about 90 volts (2835 RPM) at about .6 amps each. There was about a 15 RPM difference between what he ran the two coils at, so that could account for the difference in volts out.
So even with twice the magnets on the rotor at around the same RPM (he ran at 2820-2835 and I was running at 2800) I am only getting 6 volts MORE. Around 96 volts...IF my coils are all the way in now, and I am beginning to believe they ARE.
WHY he told me these coils would put out around 120 volts, I will never know, but obviously they do NOT. Maybe it was just the test equipment he was using at the time. Right now we are using the same meters and same RPM gauge so there is no disparity. What there IS appears to be DISAPPOINTING results.
But there are some positives, so I will share the information should anyone ever attempt to replicate this stuff. Be aware that the following are my ASSUMPTIONS, and they could be well off the mark. Since voltage is a product of magnetic flux in the core and turns of wire on the coil, and 24 magnets on the rotor is producing very little additional output over the 12 magnet rotor, (much of which could be due to differences in spacing and other variables) I am assuming that the core is absorbing as MUCH flux with the smaller number of magnets as it can HOLD for the RPM that the rotor is traveling.
The depth of the plastic that holds the coil bobbin is approximately 1" deeper that the length of the bobbin, so they are currently inset into the plastic that far. That "extra" space is approximately 30% of the length of the 3 1/4 x 3" diameter" bobbin.
So working with that 30% number...
If I extended the core by 1"...
The current bobbin holds 3 strands of 1,000' each.
If I were to increase the length of the coil bobbin somehow by that additional 1 inch, I could get an additional 900 feet of wire on the coil or 300 feet more on each of the 3 strands. That should improve output as long as the flux remains the same with the greater core mass.
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I guess I forgot how much was going on with you and your team. I saw some of the video and was thinking that was all of the video they sent. That's what I get for thinkin.
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I doubt it. They started by testing a 24 wire coil and worked their way down to a 3 wire. They were also testing iron, metglass, ferrite and a couple other materials. I was around for the beginning of the testing, with the iron, to see the baseline, but not for the end, which was weeks later. It took time to make all the different coils, and I was busy winding while they were putting cores in them and testing. The chances I was there when they tested a 3 wire permalloy coil are about 100 to 1. And I was the only one shooting video, except for short clips they texted to me.Leave a comment:
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Glad you have the caps on hand so someday you can get rid of all the ripple. If your AC variac voltage is approx. 70v then multiple 1.4. or 70 X 1.4 = 98vdc.Originally posted by Turion View Post
I hope you can get what you want out of those coils. Sorry about the delay finishing this post, my kridders high jacked me to the corner store for fun treatsLast edited by BroMikey; 01-28-2022, 03:02 AM.Leave a comment:
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I’ve got tons of different caps both AC and DC. I already have several of what you have shown. What I am short on is TIME. Went to Sacramento today and dropped off two coils at my friend’s house to be tested on the old machine. I have one small project to get out of the way tomorrow and then have the rest of the weekend to work on the generator. Hopefully I can solve this non-performance issue.Leave a comment:
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