The 'Bad' style motor has GREAT looking coils for hard drive magnets. If I can just figure out how to get them off that steel plate, they will find a home in a teeny-tiny 8/6 dual rotor, for camping. That's designed super simple too, except for the coils. G- [ Parent ]
If you look at the thread 'my projects so far (long, with pictures)', by me, Dinges, you'll notice the very same 6 coils that you have difficulty removing.
I have 'di-sected' many a VCR, and recently have started saving these coils. Perhaps one day, I'll make a tiny generator too with them. Mine were mounted on a PCB; not very easy to get off, but possible if you use care and take your time. On some coils, one turn (usually on the inside) has gotten loose; in that case, just cut off the wire; your coil will end up one turn smaller than the others, no problem.
Have saved the bearing assemblies of these VCR motors too (have started saving them way before I started saving coils...). They should make it easier to complete the mechanicals of the generator; I have thought about using the entire PCB, like you do, for a generator. Doesn't look very professional, but probably works fine.
Glad to see you & I have got the same idea on recovering those coils. BTW, I notice lots of things on this board that make me think 'hey, I had the same idea too!'. Funny eh?
Hmm... Your talking on the subject has given me new inspiration; will make some sketches & calcs on such a tiny generator ASAP. Will be fun, though not very useful. I have some round NdFeB-magnets (bought cheaply at a ham-fest) of 14mm diameter; they would be fine for this purpose. For a rotorplate, I could probably use the original rotor (the flat plate with axle pressed into it). Double rotor design, of course; a mini-version of Hugh's generators.
Off-topic: who invented the axial-flux generator/its fitness for wind-energy? Was it Hugh P., or is he the one who popularised the idea?
Do you have any ideas about the number of turns? Tried counting them (yeah...), but no succes. I could unwind a coil, but then I'd have only 5 left...
Like your idea about the rulers too, BTW!
Peter, The Netherlands.[ Parent ]
The 'bad' motor coils from the one in the photo are (about) 9 thick x 16 wide, or 144 turns per coil, about 5mm thick. The multi-pole magnet is about 4mm thick, and MUCH stronger and with greater area than the other style. They are mounted to a solid 1mm plate, along with all rest of the circuits.
My next plan, if the coils can be removed, is a dual rotor with 2 of the same magnets, or maybe HD magnets, mounted on speaker plates (thanks Jerry!). The speaker plates will be drilled and threaded for all-thread shaft, and a set screw will be added. The air gap and magnet disks will be adjusted by turning the disks so the magnets line up, then tighten the set screw. There is no need for jack screws from disk to disk!
That should allow for maximum area in the center, and use of common bearings. Center area and finding suitable bearings are always a major problem for me.
All-thread is long bolt, 150mm up to 3 meters, with no head, a common product in the US.
A picture is worth a thousand words. Like this, but the speaker plate (magnet disk) hole is simply drilled and threaded. http://www.fieldlines.com/story/2004/10/4/22201/3047
G-[ Parent ]
