Electrostatic generator/motor electrodes located on the inner surface of an electromechanical battery rotor
View Patent ↗A geometric design of E-S generator motor electrodes mounted on the inner surface of a fiber-composite rotor is provided. The electrode configuration is able to sustain very high g levels. The rotor may be funned of carbon-fiber wound on top of an inner E car S-glass fiber composite core. The electrode design provides the needed area to satisfy the power requirements of the storage system and utilizes a stacked wedge-like electrode array that both solves the high-g problem and results in a doubling or tripling of the electrode area, relative to that of electrodes that conform to the inner cylindrical surface of the rotor.
1. A method, comprising:
providing an open cylindrical rotor having an inner wall and a longitudinal axis of rotation (AOR), wherein said inner wall comprises a rotor electrode mounting surface, wherein the distance from said AOR to said mounting surface periodically varies along the length of said AOR, wherein said surface comprises a series of rings attached to said inner wall, wherein said rings are oriented to be perpendicular to said AOR, wherein each ring of said series of rings has a base and a peak, wherein said base is connected to said inner wall, wherein said peak points toward said AOR, wherein said base is wider than said peak, wherein said rotor comprises fibers embedded in an epoxy matrix, wherein said fibers comprise a material selected from the group consisting of E-glass, S-Glass, basalt fibers and carbon fibers and wherein said inner wall is electrically non-conductive;
providing rotor electrodes fixedly attached to said mounting surface, wherein said rotor electrodes have a long dimension that is oriented in the direction of said AOR;
providing a stator located within the hollow portion of said open cylindrical rotor, wherein said stator comprises an outer surface;
providing stator electrode blades attached to said outer surface, wherein said blades extend radially outward from said outer surface and are periodically spaced azimuthally in rows and columns around said outer surface, wherein as said rotor rotates, said rings are unobstructed by said blades; and
rotating said rotor.
2. The method of claim 1 , wherein said peak is rounded or beveled.
3. The method of claim 1 , wherein each ring of said series of rings, comprises material selected from the group consisting of G-10 glass and fiberglass.
4. The method of claim 1 , wherein said carbon fiber composite is wound onto a non-conducting core that includes said inner wall.
5. The method of claim 4 , wherein said non-conducting core comprises a material selected from the group consisting of glass and basalt fiber.
6. The method of claim 1 , wherein said rotor electrodes comprise strips of metal foil.
7. The method of claim 1 , wherein said rotor electrodes comprise metallic coating.
8. The method of claim 1 , wherein said rotor comprises multiple spaced cells in the direction of said AOR, wherein said cells are bounded on their upper and lower surfaces by said rings.
9. The method of claim 1 , wherein said rings are wedge-shaped.
10. The method of claim 1 , wherein said mounting surface comprises slots in said inner wall.
11. The method of claim 1 , wherein each blade of said Hades comprises an electrically conductive portion that is sheathed with dielectric material, except for the portion of said blade that is in electrical contact with said outer surface.
12. The method of claim 11 , wherein the edges of said blade that face said rotor electrodes are rounded or beveled.
13. The method of claim 11 , wherein azimuthally, the positioning of said blades matches the periodicity of said stator electrodes.
14. The method of claim 1 , wherein the gaps between said rotor electrodes are wider than the width of a rotor electrode.