 This machine contains the stator I posted last week. I thought the coil height was too high. As it turns out, it works but it probably would be more efficient if I made the coils shorter after all.
 Here is a pic of the tail pivot. This is an auto furling machine. Although it hasn't been tested yet, it will by the end of the week and I have to put the mast back on the truck to test it. Haven't got to it yet. :)
 I used two types of mags on this one. It was just that I had the disc neos laying around and I just got enough rectangular blocks for the front. The disc neos on the bottom are 1 1/2" x 3/16" discs and the neos on the top rotor are 1" x 2" x 1/2" rectangular blocks. There are 12 mags on each rotor, and since this is a three phase machine, there are 9 coils. Three coils per 4 magnets.
 Here you can see what Im talking about when I say the coils are too tall. This is the rear of the stator and since this rotor has disc mags, the mags pass somewhat through the center of the coil. But on the front rotor with the rectangular blocks, the mags pass over the lower 3/4 of the coil. Not the best way to do things, but it works for now.
 I used brass screws to make 6 terminal posts around the rotor. The posts are at the beginning and end of each 3 coil series leg. This is so I can wire the stator in star or delta later on if I want without jeopardizing the strenth of the actual magnet wire in the coils (I glued it all down around the edge). I use jumpers to make up star.
 This is a pic of the machine being spun by hand. Its putting out 24.39VAC. I would guess that it cut in occurs at around 110-120 RPM. This machine is wired in star now and if I put it in delta obviously it would take more speed to see the same voltage, but I would effectively raise my current. Since this is a 'low wind' machine I left it in star. RoyR |
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