Vertical Wind turbine and 3Phase alternator 9 Coils / 12 magnets

thingiverse

A 3D printed drone project with a rich history of revisions! Here's a breakdown of the changes made to the design: **Initial Design (Rev 0.0)** The design was first published on June 30th, 2015. **Early Changes (Revs 0.1-0.4)** The first few revisions focused on making minor adjustments to fit the printer's capabilities and reduce part sizes. These changes included: * Rev 0.1: Reduced stator size by 2mm * Rev 0.2: Modified coil holders for better adjustment and reduced gap between coil and magnet * Rev 0.3: Adjusted inner ring to fit inside a 90mm tube (which is actually smaller) * Rev 0.4: Made winder tool taller **Performance Optimizations (Revs 0.5-0.16)** As the design evolved, the focus shifted to improving performance: * Rev 0.5: Modified outer ring and legs for better fit on a 20mm tube * Rev 0.6: Added rectifier schematics and 3-phase schematic * Rev 0.7: Added holding rings and updated documentation * Rev 0.8: Added top plate, gallery pictures, and partial assembly instructions * Rev 0.9: Added coil connection schematics and descriptions * Rev 0.10: After a first test, the voltage was too low (6-7v), so the design was drastically changed * Rev 0.11: Fixed tolerance issues on stator core and rotor core; added 90mm tube cap * Rev 0.12: Updated rotor core and rotor arm * Rev 0.13: Updated rotor core and stator arm for better prints overhangs * Rev 0.14: Updated stator arm to better fit coil * Rev 0.15: Updated rotor arm to handle overhangs better * Rev 0.16: Decreased wire size and increased turns, with good results in a field test **Rotor and Blade Design (Revs 0.17-0.31)** The next set of revisions focused on the rotor and blade design: * Rev 0.17: Modified rotor arm to be stronger * Rev 0.18: Started field testing with 350 turns coils * Rev 0.19: Updated rotor core to reduce gap between rotor and stator, improving performance * Rev 0.20: Updated gallery pictures to show assembly progress * Rev 0.21: First single coil test showed good results; added gallery pictures * Rev 0.22: Tested 3 coils and power rectifier * Rev 0.23: Tested coil casting on single phase * Rev 0.24: Added parts for holding blades * Rev 0.25: Added blade STL * Rev 0.26: Remade Blade attach system to be stronger * Rev 0.27: Updated blade​ attach arm to better fit * Rev 0.28: Cast rotor with resin (after field test) * Rev 0.29 and Rev 0.30: Updated documentation **Final Revision (Rev 0.31)** The final revision, Rev 0.31, was published on July 27th, 2015, and included build instructions. I hope this summary helps you understand the evolution of this 3D printed drone project!