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Thread: Bedini 1984, 2017 style.

  1. #11
    Test Data on an 8 Filar 18ga Bedini Spec coil in series.
    12 magnets alternating N/S evenly spaced 161 mm apart.
    North South 12.JPGNorth South 12 Magnets.JPG
    Last edited by Deuis; 02-16-2018 at 02:27 PM. Reason: repaired attachment
    Cant spend it when your dead.

  2. #12
    Test Data on an 8 Filar 18ga Bedini Spec coil in series.
    9 Magnets in clusters of 3 spaced 53mm apart to simulate a 36 magnet wheel.
    All North clusters of 3 @120.JPGAll North clusters of 3 @120 degrees.JPG
    Last edited by Deuis; 02-16-2018 at 02:28 PM.
    Cant spend it when your dead.

  3. #13
    Test Data on an 8 Filar 18ga Bedini Spec coil in series.
    12 Magnets in clusters of 4 spaced 53mm apart to simulate a 36 magnet wheel.
    All North clusters of 4.JPGAll North clusters of 4 A.JPGAll North clusters of 4 B.JPG
    Last edited by Deuis; 02-16-2018 at 02:29 PM.
    Cant spend it when your dead.

  4. #14
    12 Magnet wheel all north with adjustable coil. 2" X 1" x 1/2" magnets
    12 North Out.jpgCoil Holder.jpgClusters of 4.jpgIMG_20180116_135034006.jpg
    Last edited by Deuis; 02-16-2018 at 02:36 PM.
    Cant spend it when your dead.

  5. #15
    Senior Member Yaro1776's Avatar
    Join Date
    Aug 2012
    Location
    Heart of Vermont
    Posts
    344
    Yo John,

    Happy Valentines Day and thanks for your complete test results and pics on the magnet cluster progression. Nice meaty spikes generated that multiply the output for a minimum additional input. As a suggestion an accompanying chart with the freewheel data without magnets would be useful to establish the input baseline.

    For us neophytes it would be useful to briefly explain your goal in these experiments and to broaden the perspective. Nice work on the coil holder - assume that the 3D printer was in play here.

    BTW - the attachment in post #11 is MIA.

    Thanks for sharing your neat and informative work - glad to see you are still active after a short hiatus.
    Yaro

    "The Universe is under no obligation to make sense to you." -Neil Degrasse Tyson

  6. #16
    Hi Yaro,

    These tests are purely measuring the output spike when a magnet passes the standard coil at measured speed.
    The motor is isolated from the circuit and at the moment isn't relevant, however it will be later on.
    I was specifically looking at coil voltages and wave patterns So i could deduce the best arrangements.
    I wanted to see correlations between velocity, voltage, frequencies and also saturation levels
    This test can be used to calibrate magnet strength, determine core saturation and compare to other magnet arrangements soon to come.
    For instance I expected a higher voltage with the magnet clusters but this wasn't the case, I assume due to saturation of the core but even at lower RPM the peaks were still smaller than the 12 magnet wheel.
    The wheel itself can have any arrangement of up to 36 mounts, I will be posting scalar patterns and also ring magnet passes to identify the best speed / number / type / frequency / core material / coil size so I can accurately figure out my design going forward.
    This is all about sorting out the biggest wheel for the least power per magnet pass.
    A lot of variables here but I hope someone else can benefit by the posting of raw data on the standard coil.

    The ebike wheel itself and power consumption is being used as a yard stick, with better aerodynamics I can reduce power output but it's not a concern of mine yet. I will be using it as a reverse meter of sorts. The SG circuit will be hooked up eventually, isolated from the motor and I can use the motor to assist or create drag for experiments on mechanical loads or power assist.

    The adaptability and reliability of the wheel is immense.
    No more guessing for me.

    Yes the wheel bead nuts, magnet holder and coil holder are all 3D printed.
    I was sceptical of 3d printers but they are insanely good.
    Once I finished final design work in CAD I just printed as many as I needed.

    Quote Originally Posted by Yaro1776 View Post
    Yo John,

    Happy Valentines Day and thanks for your complete test results and pics on the magnet cluster progression. Nice meaty spikes generated that multiply the output for a minimum additional input. As a suggestion an accompanying chart with the freewheel data without magnets would be useful to establish the input baseline.

    For us neophytes it would be useful to briefly explain your goal in these experiments and to broaden the perspective. Nice work on the coil holder - assume that the 3D printer was in play here.

    BTW - the attachment in post #11 is MIA.

    Thanks for sharing your neat and informative work - glad to see you are still active after a short hiatus.
    Cant spend it when your dead.

  7. #17
    Wheel bead locker with Magnet holder.
    Bead nut screws in and the holder locks it from moving with 4mm stainless bolt through the middle.
    Centre circle locks into the wheel spoke hole accurately placing the nut at a specified angle in divisions of 10 degrees.
    Nut profile.JPGHolder top.JPGHolder bottome.JPGFull unit.JPG
    Last edited by Deuis; 02-16-2018 at 06:29 PM.
    Cant spend it when your dead.

  8. #18
    Test Data on an 8 Filar 18ga Bedini Spec coil in series.
    36 Magnets spaced 53mm apart.
    Frequency held fairly well but voltage is way down indicating core saturation issues or possibly magnet field problems.
    IMG_20180222_152659833.jpg 36mags.JPG
    Cant spend it when your dead.

  9. #19
    Test Data on an 8 Filar 18ga Bedini Spec coil in Parallel.
    36 Magnets spaced 53mm apart.
    Some crazy harmonics riding up and down the wave.
    IMG_20180222_163625427.jpg36 paralell.JPGIMG_20180222_152805129.jpg
    Cant spend it when your dead.

  10. #20
    Test Data on an 8 Filar 18ga Bedini Spec coil in series.
    12 Donut magnets evenly spaced 161.6mm apart.
    Magnet centre is slightly larger than coil core.
    IMG_20180223_114602284.jpg12 donut.JPG
    Cant spend it when your dead.

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