savonius wind generator Here we go again. I wound new coils with thin copper wire from small fans armatures in microwave ovens. didn't get great voltage so I added additional magnets to the project. now, I see better results. coil winding was quick using a drill and a mold template I remove the coil after spinning it I will make a diode bridge rectifier to make dc voltage when done. . Im excited now its been too long.
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Thanks for the valuable info. I had finished the part with coils and wired it two phase with a diode bridge rectifier. I think I made a mistake though on direction of coil winding and to correctly place end of one coil to lead of another which is important. I tried it out and it was flashing leds but not much voltage.
For the vawt, try wiring the 3 phases separate and not in star. Then you can run both legs of each phase to a recitifier. Then you can series wire each dc output with a 1000 uf capacitor between the dc outputs. This will triple the output voltage. For our slower speed vawts this gives charging voltage at low rpm. At about 60 rpm you will get 12.5 vdc. Hurts the amps a little, but thats better than waiting for those rare 20 mph winds.
@bg0821 Yeah, i know the metal rotor thing sounds a bit strange but it does work. For a better explanation have a look at the vids from “wind to volts”.
First time I’ve heard of metal directing more of the field towards the coils. I know that wood even if waterproofed like I did is prone to bowing over time. the epoxy resin however should help stablize it. The rotor is meant to be driven by a ten gallon bucket in half.
Great idea. What are you going to drive the rotor with? Dying to see the finished project! Also, i’ve been working on another project and found that using a metal plate for the rotor is better than wood as the metal stops the magnets from what’s called fluxing. Basically the metal plate helps direct the magnetic field towards the coils. Wood allows the field to go all over the place. At the same rpm I found an increase of over 2 volts just by replacing wood rotor with metal.
I thank you. Your sharing is special. Pioneer, you are.
steel or aluminum plate is actually the way to go with the mount for magnets they both don’t bow like wood might. If I need to I will change over to plate if I get bowing.
thanks, I changed the board over to a lighter board and its not plywood like the one shown here. no need for all the heavy epoxy after all. just the one set of magnets glued to a flat board I forget the name of it. not wood based. for shelving, anyway, I hope all is well in the end.
Nice job! I wish you well in completing the project.