Tower of Power

EF 152Final Project

November 30, 2009

Who are These People?

Austin Lee – Mechanical Corey Stancombe – Mechanical Lanier Loftin – Industrial Adam Bonomo – Industrial

Device Operation and DesignPermanent Magnate Generator

1. Fan turns blades2. Rotates gears at 4:1 ratio3. Spins duel rotors4. magnets on rotors induce current

in coils5. Electrical energy drives bulb

Mechanical Aspects

Carbon Fiber High-Speed Shaft Geared at 4 to 1 ratio Horizontal axis design Duel magnet rotors Single sandwich stator

Electrical Aspects

8 magnet sandwich design 2x as much magnetic flux transfer

through coils 4 coils

Estimated to be 300+ turns each Single phase stator

Alternating clockwise and counterclockwise winding Wired in series

Efficiency Calculations

power= V*I 1.2 watts = 12V*.1A

Issues

Coil Problems Winding on bobbins using power drill Alternating direction of coils Correct Coil wiring

Balancing Rotors Using properly sized wheel collars to

eliminate vibrations Close Tolerance

2mm (hard to achieve)

Summing Things Up

Kept under the $40 spending limit Very good voltage being produced Measurements were very

important in this project A lot of trial and error, and new

LEDs