The generator was built for the "windmill on wheel" turbines.
This generator was made by simply adding parts (in pairs) to a bicycle wheel in order to build the rotor. The part that I invented takes advantage of the difference in width of the bicycle hub and the width of the rim. By example, if the hub is 3 inches wide and the rim is 1.5 inch wide, then two 3/4 inch thick pieces of wood(one on each side of the rim) can vertically slide down and make contact with the inner side of flange (or shell head). At the point of contact with the flange, the piece of wood will be narrow (about 3/8 inch)because the sections of the inner flange that are not covered by spokes are narrow. Starting from the narrow flange contact point, the width of that piece can gradually increse until it ends a distance above the rim. Thanks to the gradual increase in width of the pieces of wood, contact with the spokes will be avoided. The final shape will look almost like a ping pong paddle. Above the rim, magnets will be attached to the pieces of wood. A pair of these pieces of wood (now transformed to magnet holders) will attract each other from accross the rim. That attraction force will deliver compression force on the inner sides of the hub flange and hold everything in place. If you measure the difference between the widths correctly, then you have a vertical gap as wide as the rim (before and after you add the magnets and "optional metal plates"). In the video, four pairs of magnet holders are used to make the rotor. I added two nuts and bolts to each pair in order to add holding pressure to the flange. However, This assembly does not need nuts and bolts to stay together and rotates at slow speeds without any problem. A clip that secures each paddle to the hub, could also be added to the narrow bottom tip.
Because of this simple design, I will name this rotor assembly: "The magic Rotor"
If you see a gap between the pairs of magnet holders, it is because I need to make a better template that will not allow gaps. I am working on other designs involving bicycle wheel based rotors and generators. This first design belong to the people of the world who can use any amount of electricity but only have a rusted bicycle wheel. These magnet holders have done the job. I will now work harder to build a good Stator and deliver a good looking generator.
The magic rotor is now in the public domain. P R Paul (Boston Ma. USA 2/09/08).
Born in Haiti
ADDITIONAL CONSTRUCTION INFO:The beauty of the part is that it lets you decide the size and number of magnets. However, the pairs of magnets that face each other must also attract each other. The thickness of the piece of wood is the most important aspect of this assembly. Once you measure the difference between the width of the rim and that of the hub (from inside flange to inside flange), you will need wood that is as thick as 1/2 the difference of the widths.
When tracing the paddles on the large piece of wood, align the fibers from skinny tip to wider top. The paddle must be able to withstand some tension and not snap. If the wood is too thick, the gap walls will not be parallel. The gap distance above the rim will increase as you move away from the rim. If the wood is too skinny, the gap distance above the rim will gradually decrease as you move away from the rim. You can make an adjustment to a piece of wood that is too thick, by reducing the thickness at the skinny (flange contact) tip, until both pieces become parallel. If the wood is too skinny it could be distorted by the tension applied by the nut and bolts. If the wood is strong but not thick enough, additional thickness can be added to the narrow tip. "Gluing" a small piece of metal to the narrow tip that makes contact with the flange could prevent wood erosion at that compression point between the metal flange and the wooden paddle tip.
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If you want to get the plans for building a Magnetic Generator
Just search Google for "top magnetic generator" and click the first result
I found it to be a great resource
gmesthermax 10 months ago 4
@gmesthermax Hi! I have seen a lot of plans over the years. This is why I make original designs myself. I build for people who do not have access to machine tools and only have hand tools. Look at the other alternator videos on the generatorblue channel. The ceiling fan alternator and the scooter motor (limited lifespan carbon brushes) deliver more bangs for the buck. Most alternator designs require machine tools and large scary magnets. I hope that you share your experience when you build one.
generatorblue 10 months ago
U need to wire it in 3 phase so the lit does not flicker.
mannhorn34 1 year ago
@mannhorn34 Using this electrical box, it will be easier to setup a 2-phase alternator. An electrical box with six sides will be needed for 3-phase. However, I stopped this project because I could not find a steady supply for that special bicycle wheel (read the text sections for details of the "magic rotor"). I first need to modify the design to make it work with different wheel designs from different manufacturers. I am also trying to use fewer magnets. If you can improve it, please do so.
generatorblue 1 year ago
So where are the plans to make this?
kyleain 1 year ago
@kyleain Hi! Watch the "magic rotor" video and also read the information section of the video. If you stop the magic rotor video, you will see a flat rectangular piece of metal on one side of the (elephant head looking )wooden paddle. Two magnets located 3 inches away from each other are stuck to the rectangular metal plates. You will need flat coils. The narrow end of the elephant head paddle avoids spokes. Need a wheel that is well balanced. 4 arms for 4 coils can connect to a 4 sided ebox
generatorblue 1 year ago