Recent content by CNCAddict

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    50mph Razor E300

    Using a Freefly ARC200 motor drive to get around 50mph on an E300 https://www.youtube.com/watch?v=9iJfO7SDEQQ
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    Drone Surfing

    just need to scale everything by x4 in Solidworks ;-)
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    Drone Surfing

    The company I work for made a new video that may be interesting to you guys. Might need a new section at ES for aircraft/watercraft hybrids ;-) BuRf6r0LuL8
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    Xnova 8kw rc middrive first test

    Just as an FYI, I have nothing to do with Xnova motors and I can't say anything about their quality. The design from the outside looks exactly the same as the motors I designed. I stopped selling motors some time ago when I started working on camera gimbals and other flying things at...
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    Compact Field Oriented Controller, ASI + Grin, limited run

    Same problem here running 1.5.4, don't see "d output".
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    Lebowski's motor controller IC, schematic & setup, new v2.A1

    Switching losses increase with increasing frequency. There is a balance between switching losses, current ripple losses, and motor switching noise. That balance point is usually between 12 and 100khz...but there are no set rules.
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    low inductance output stage contruction

    I find it's much easier to preheat the entire assembly on a hot plate, oven, or hot air station to just below a temperature that will start damaging components. Soldering anything massive is far easier that way.
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    Destroyed! A warning to those using freewheel cranks....

    Yeah, that's the one and thanks for the info. I'd be interested in picking one up depending on the price :)
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    Destroyed! A warning to those using freewheel cranks....

    Do these have the same dimensions as the white industries freewheel; hole locations etc?
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    Lebowski's motor controller IC, schematic & setup, new v2.A1

    He already posted in your own thread ;) http://endless-sphere.com/forums/viewtopic.php?f=3&t=38337#p559556
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    powercroco 135-50 inrunner - 40kW bldc

    Carbon is fine. All the neumotors use it and I've used it as well.
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    Envia Systems twice the energy density of lithium cobalt

    Yeah..seems like these are really 300wh/kg cells which is still awesome...but they need to fix the huge degradation over the first 10cycles before they can honestly claim 400wh/kg. Still...if 400wh/kg is possible for 10 cycles with these cells..maybe their 2nd gen cells will do it for 100-1000?!
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    A123 20Ah cells price down to 17.50$ per cells?

    Yeah, you just have to let the video play in the background and jump in when things get interesting. If you are in a browser, just leave it running in a tab. Lots of industry gossip and other things that might be valuable in these videos.
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    A123 20Ah cells price down to 17.50$ per cells?

    Haha...he really lets us "kids with bicycles" have it at 33mins in http://www.youtube.com/watch?v=RVh47P4h6PY&feature=g-u-u&context=G2ce3ff7FUAAAAAAAAAA
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    A123 20Ah cells price down to 17.50$ per cells?

    multiple cells in parallel are identical to one big cell.
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