/diy/ - Do It Yourself

>>2408293
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Ok let me rephrase that less nicely. I've studied electromagnetism enough to be skeptical when you're wrapping a coil around the rotation axis. Without mincing words, your theory is complete bunk. You complain about the poor fill factor of Tom Stanton's amateur 3D printed alternator, but your design is nothing like a more professionally designed axial flux motor (pic related) but rather has a completely different geometry. FYI the coils in my pic should be filled with magnetically permeable material.

I tried to say this 2 or 3 times the first time you came up with this idea, but let me say it again. The magnetic flux density integrated across a coil's area needs to change as a function of time. Your coil is symmetric about the axis it's rotating in (from what I can tell from your simplistic 2D diagrams) meaning by definition the flux density won't change as it rotates. Adding the Halbach arrays like I suggested won't help that. If you still want to keep up the pretence of not understanding what I'm describing but won't 3D model it in something shitty like sketchup or tinkercad, or on the off chance that I'm actually wrong, I'll fucking 3D model some cross-sections of your design myself.

Then there's also the appeal to "engineers are smart" saying that if this kind of motor topology was smart we'd see it all the time. I don't usually rely on that kind of logic, but considering BLDCs are pretty ancient tech and the chinks have been refining the technology for drones and ebikes for the last decade or two, I'd say it holds at least some water.