Bedini RPX Sideband Generator

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Thread: Misc. Advanced Bedini Questions

  1. #11

    Update

    James,

    I applied your recommendations and got the generator coils connected in series, ending with one wire at the top and one at the bottom. Thanks for the advice. It reduce the confusion of connecting multiple windings in series.

    You're right about hefting it during the winding; I took several days to wind the stiff 12 strand twisted cable. It was like bending solid metal. That time included getting the strands connected. Whew!!

    Even with the two extra windings and the wider 2.25" rod core, I can get only about 7v AC. Adding a single rectifier and a 4700uf/50v cap got it up to about 9v DC. Gap distance between the coil and wheel, to get the highest output, was about 0.25". Tweaked 26" wheel speed is about 230 RPM with 18 ceramic magnets. I am disappointed on the generator coil output. Almost any coil load other than the volt meter, slows the wheel to below 200 RPM, affecting the on-going charge rate.

    I'm interested in reconnecting the windings into the Tesla Bifilar configuration. By tying 2 of the 12 windings in the in bifilar configuration, I might get better results. If I do get higher voltage on one coil, I might expand that idea and create another similar bifilar configuration, then tie those two bifilar coils in series. If favorable increase in voltage is present after two coils, I'll connect the remainder of the windings in a like manner.

    Have you/anyone reading this, ever made a iron-core bifilar coil instead of a typical pancake bifilar coil??

    Have you ever tried a typical magneto coil from a small gas engine on your wheel??

    Regards,
    J.D.



    Quote Originally Posted by James McDonald View Post
    Hi JD --

    Looks like my drawing did not stay in tack. The downward character should be were the small "x" is and the other
    end of that character should connect to the less then symbol "<". Otherwise if you need a better drawing we may have
    to exchange email addresses and I can make a PDF drawing to email to you.

    Hope this helps.

  2. #12
    Senior Member James McDonald's Avatar
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    Odenton, Maryland
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    130
    Quote Originally Posted by jd_zinke@hotmail.com View Post
    James,

    I applied your recommendations and got the generator coils connected in series, ending with one wire at the top and one at the bottom. Thanks for the advice. It reduce the confusion of connecting multiple windings in series.

    You're right about hefting it during the winding; I took several days to wind the stiff 12 strand twisted cable. It was like bending solid metal. That time included getting the strands connected. Whew!!

    Even with the two extra windings and the wider 2.25" rod core, I can get only about 7v AC. Adding a single rectifier and a 4700uf/50v cap got it up to about 9v DC. Gap distance between the coil and wheel, to get the highest output, was about 0.25". Tweaked 26" wheel speed is about 230 RPM with 18 ceramic magnets. I am disappointed on the generator coil output. Almost any coil load other than the volt meter, slows the wheel to below 200 RPM, affecting the on-going charge rate.

    I'm interested in reconnecting the windings into the Tesla Bifilar configuration. By tying 2 of the 12 windings in the in bifilar configuration, I might get better results. If I do get higher voltage on one coil, I might expand that idea and create another similar bifilar configuration, then tie those two bifilar coils in series. If favorable increase in voltage is present after two coils, I'll connect the remainder of the windings in a like manner.

    Have you/anyone reading this, ever made a iron-core bifilar coil instead of a typical pancake bifilar coil??

    Have you ever tried a typical magneto coil from a small gas engine on your wheel??

    Regards,
    J.D.

    Hi JD --

    Wow what a feat to make a coil like that by yourself. I would of thought you would have achieved a higher AC voltage
    output also with more windings. But the speed of the SG Machine is important in getting a higher generator output voltage. My
    generator coil only makes a 5 RPM drag on the wheel spin speed. I have got my generator coil to make an 18 volt AC output
    but the SG machine was running at 335 RPM with a 21 magnet wheel. However I did an experiment with a spool of 18 gauge
    wire with no core and it was not even at a parallel gap and the gap was irregular. I got enough AC voltage output to flash the
    LEDs I had hooked up to the output wires. This spool of wire had access to both ends so I just removed the vanish from both
    ends. The coil of wire was one strand at 1100 foot of wire. I am thinking that if I would of put a core into that spool I would
    get the same voltage output at the 10 strands of litz wire. It would have saved me a lot of labor of winding a special 10 wire
    litz generator coil.

    Have you/anyone reading this, ever made a iron-core bifilar coil instead of a typical pancake bifilar coil?? No. But I did make a
    Tri-filar coil before and it also produced enough voltage to light up an LED with no core.

    Have you ever tried a typical magneto coil from a small gas engine on your wheel?? No. That type of coil is very different and a
    lawn mower engine run at a high RPM. If you have a magneto coil available for doing this experiment please try it out I
    would be interested in the results you get.

    -- James

  3. #13
    insidecoil1.jpg I tried an experiment and don't understand the results. I put a coil inside a cylinder I printed, the coil is stationary. The cylinder is only about an inch and three quarters, inside diameter. It has 4 quarter inch vertical holes ninety degrees apart with diametrically magnetized cylinder magnets, all north facing in. They are only an inch and a half long, about the same size as the diameter of the coil. It's all mounted on a modified vcr head. Anyway, it works great, I don't get it. I used a reed switch I held in my hand to find the sweet spot, nothing unusual with the timing.
    Last edited by Notsure; 11-01-2015 at 09:23 AM. Reason: added picture

  4. #14
    Sorry guys, figured it out. I had the monopole coil in there, my bad. I've been experimenting with conical coils and if you wind two coils going in the same direction from the center out and joined together it forms a monopole by + and - on the ends. If you counter rotate them from the middle out it can only be a monopole by joining the ends and the middle wires together. I wind a lot of coils and long story short, grabbed the wrong one. Getting old, lol.
    monopole coil.jpg

  5. #15
    I think if I change the rotor to 6 magnets and alternate the poles towards the coil it should give me the push pull effect like the zero force motor has.

  6. #16
    The monopole coil gives no advantage using it with spinning magnets, that I can see anyway. I'm going with reciprocal motion. Opposites are opposite they void each other.

  7. #17
    On your internal coil, consider pairing up two leads and treat the two as a 2 conductor Tesla Bifilar coil, joining one of the ends of on one end with one wire end on the opposite end of the coil. Output will be higher...... Shorting the coil with a magnetic reed switch will further increase thevoltage output.

  8. #18
    I think this method is the same principle. I believe it to show how magnetism works, why a magnet has a bloch wall. Electricity spins towards the middle from the ends in opposite directions. The magnetic field is like the mirror image of that. From the middle to the ends in the opposite directions of the electric. I think Tesla knew this and that's how he came up with the bifilar coil. This coil proves it also, if the windings are in opposite directions from the center, it's bipolar, same directions from center, monopole. Both methods give a superior solenoid overall. The monopole solenoid is great for using a magnet as the plunger. It's not an actual monopole of course, but the effect is the same. The wider center has less windings than the ends. Direction of spin is relative, you can't wind from the center out because of the shape, you have to wind from the ends so it can be confusing.

    coil fields.jpg
    Last edited by Notsure; 11-08-2015 at 12:37 PM. Reason: add picture

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