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Thread: 3D Printed Window Motor

  1. #81
    https://www.youtube.com/watch?v=xcBmaDqj578&t=2s & https://www.youtube.com/watch?v=BOWLWe9HEMw
    I can't imagine that there is any null between these magnets either. Although they are ceramic they are still large, strong, and relatively close together. You can see that they are triggered by smaller diameter magnets using hall switching.

  2. #82
    Senior Member Tom C's Avatar
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    Doug,

    to answer your question yes we are working on both a half bipolar and a full bipolar circuit board kit. we are almost finished with our full Tesla switch kit and this will be next. we tend to do a lot of testing before we ship something.

    I will p.m. you when we have one ready.

    now to the magnetic field lines and magnet /coil interaction. when I built my first window motor it would not rotate at all. I brought it to john, he said my magnets (neo) were too powerful. he said you want the edge of the detectable field in gauss ( not sure how strong) of the pole of the magnet to just touch the outer edge of the window motor coil. and he wanted the filed lines to completely disappear from interacting with the coil where they overlap. this may have to do with electron flow directionally in the open circuit but I do not know. it is how the window motor becomes more efficient. I have not played with them much other than that. for effect he took a screwdriver and slowly worked it closer to the rotor, when the metal started interacting, he said that was where I wanted the back winding edge of the coil.

    with the one I built he said I needed my coils 9 inches from the magnet on either side. considering this was a 4 inch rotor it would have been unmanageable. now its just a 400 dollar scary magnetic rotor that I am not sure what to do with, so it sits in a box away from other things. it pulls screws in from 10 inches away. really bad design on my part, but I was working from ignorance.

    Tom C


    experimental Kits, chargers and solar trackers

  3. #83
    And then we have DadHav's build with the neo's: https://www.youtube.com/watch?v=OMVtGxSYdhU He is running this motor from the Full Sequential Bipolar Circuit with wire triggering on capacitors. I have to be honest, his build was at least in some part inspiration for my small 3d printed design. His magnets appear to be the same size as mine with the same spacing. I'm sure his build is much more precision than mine. He also used all nonmagnetic material to include the shaft (stainless steel) and bearings (ceramic) where I used chrome plated steel. He is even able to run it from a Tesla coil with electrical transmission through the air!! Holy Cow!! https://www.youtube.com/watch?v=lqgjeN3Jnj8&t=518s

    I did the screwdriver trick with mine. It noticeably begins to interact about an inch past the outer diameter of my coil. I can say that at 12V+ I am certain that it has enough torque to replace the DC motor in the 1984 setup running on the Full Sequential Bipolar Circuit.

    Doug

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