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Thread: BobZilla's Custom Build

  1. #161
    I have been working on a new machine idea and finally got to where I think I might be satisfied.

    So far these are just plans but I have the files to get it fabricated. It would be a medium sized machine with a 5 inch wheel and three inch coils.

    Here is the frame, there would be threaded rod between them as supports through the holes in the arm ends.
    NewFrame1.JPG

    The wheel:

    NewWheel1.JPG

    And mock up of what it would look like:

    NewMockup1.JPG

    I am thinking about having the whole thing in Aluminum but I could go plastic too.

    Excited?

  2. #162
    Boy you guys are a tough crowd!

    Nobody cared about the cap dumper video, nobody cares about a new build.

    I guess I farted huh?

  3. #163
    Senior Member John_Koorn's Avatar
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    Jul 2012
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    Melbourne, Australia
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    1,077
    Lol Bob! Sorry, life keeps getting in the way...

    Everybody farts

    John K.

  4. #164
    But mine don't stink ;-)


    So here is a different mock up of some plans I have been drawing up. This should be much more stable than the first one I posted but I liked all the cool lines on the other one.

    NewWheel2.JPG

    frame2.JPG

    Latest Mockup2.JPG

    Latest Mockup.JPG

  5. #165
    Senior Member Tom C's Avatar
    Join Date
    Jul 2012
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    Pacific Northwest
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    1,888
    Quote Originally Posted by BobZilla View Post
    I have been working on a new machine idea and finally got to where I think I might be satisfied.

    So far these are just plans but I have the files to get it fabricated. It would be a medium sized machine with a 5 inch wheel and three inch coils.

    Here is the frame, there would be threaded rod between them as supports through the holes in the arm ends.


    The wheel:



    And mock up of what it would look like:



    I am thinking about having the whole thing in Aluminum but I could go plastic too.

    Excited?
    Bob,

    plastic please, aluminum can get eddy currents in it, if the aluminum is not spinning it will affect your build. let mew know about the coils, if you have a design I can print it for you, and can make the bobbins any size you want.

    Tom C


    experimental Kits, chargers and solar trackers

  6. #166
    Hi Bob,

    Quote Originally Posted by BobZilla View Post
    Boy you guys are a tough crowd!

    Nobody cared about the cap dumper video, nobody cares about a new build.

    I guess I farted huh?
    Sometimes I get so wrapped up in my own experiments that I fail to comment on what others are doing.

    I did enjoy the video on your cap dump modification results. It looks to be working very well!

    I do find it curious, however, that you are using 24 volts on the primary to charge only 12 volts on the output side. I understand that the machine likes to run on the higher voltage, but why not charge the two garden batteries in series instead of in parallel?

    The new designs you posted also look good.
    Regards
    Last edited by Gary Hammond; 10-17-2015 at 08:19 AM.
    Gary Hammond,

  7. #167
    Bob,

    plastic please, aluminum can get eddy currents in it, if the aluminum is not spinning it will affect your build. let mew know about the coils, if you have a design I can print it for you, and can make the bobbins any size you want.

    Tom C
    Thanks for the advice Tom. I am really on the fence about the material, it did cross my mind that the aluminum would cause problems. The other big machine I build is starting to show slight warpage on the frame now which is why I thought I should use tougher material. That thing has the weight of 8 coils on it plus the circuits and flywheel. It still runs good at this point but the warp concerns me. I may have to make it back into a 4 coiler to reduce the weight.

    I designed some simple coil holders which I was thinking about aluminum as the material because the plastic cannot be used unless I make it really thick, that is according to the software I use.

    The intent with this machine is very far from the normal mono pole. I am trying to make a transistor less model that will use clap contacts for switching mounted on the wheel. That is what the cut-outs on the frame are for, too mount the clapper. If it does not work out I can always go traditional with it. I understand that true contact switching is MUCH better than transistors because of the little bit of capacitance held in the p junction, it makes for a fluffy off rather than immediate. If anyone has ever played with just shorting a coil on a battery you may know what I mean about that.

    I do find it curious, however, that you are using 24 volts on the primary to charge only 12 volts on the output side. I understand that the machine likes to run on the higher voltage, but why not charge the two garden batteries in series instead of in parallel?
    Hi Gary,
    Always good to hear from you. Funny you ask because I did try that later on and blew some fets. Those caps are 50v so to get to a double voltage for the dump I was practically at full on the cap which I think unleashed a huge current, more than the fets could handle. Some of them locked the D&S closed so I lost switching.

    When not using a dumper I often do 24 on both ends though.

  8. #168
    Another set of plans. I think this might be what I go with.

    The frame is about 1ft tall, 2 inch coils, 5 inch rotor.

    6Coil-Frame.JPG

    6Coil-Wheel.JPG

    2inchCoilHolder_1.JPG

    2inchCoilHolder_2.JPG

    6Coil_mockup.JPG

  9. #169
    Greetings,
    So I have not played with this machine is awhile because the smaller one in my last post was built and has it's own thread in the other section.

    I have put this one (8 coiler) back on my bench so that I can work on the smaller one awhile. I had forgotten how much fun this one is ;-)

    This chart and the video is showing a spin up with a cap dumper attached. The charge battery was already finished so this is only bringing it back up to peak. The cap dump is set to half a second loop with 66kuf. This is not a full run, it's just a look at how the machine settles in on a charge.


    8coil_capDump1_1.JPG

    Video:
    https://onedrive.live.com/redir?resi...nt=video%2cmp4
    Last edited by BobZilla; 06-09-2016 at 08:37 PM.

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