EG 10112 Module 4 Independent Design and Demonstration of an Engineering System
Magnetic Induction and Electrical Generator
Section 11 Group 2
Team Members Name
Role
Critical Skills
John Kelly
Coordinator
Programming
Yichao Pan
Recorder
Graph Drawing
Charlie Hunter
Quality Assurance Analytical Thinking
Ashley Crish
Operations
Joseph Arambula Liaison
Organization&Accounting Communication
Physical Property
Magnetic Induction A changing magnetic flux can induce a current in a stationary loop wire bounding a surface
By rotating a wire in a magnetic field, one can create an electrical current in a wire
An AC Generator Reference: Image from Webassign http://ebooks.bfwpub.com/physse6e/figu res/28_22.gif
Physical Property Some real world applications.
NRC image of Modern Steam Turbine Generator Reference: Image from Wikipedia http://en.wikipedia.org/wiki/File:Modern_ Steam_Turbine_Generator.jpg
Rotor from generator at Hoover Dam Reference: Image from Wikipedia http://en.wikipedia.org/wiki/File:Hoover _dam_rotor.jpg
Magnetic Induction
= EMF (voltage) generated N = number of turns in the coil B = magnetic field A = area of the flat surface bounded by the coil ď ˇ = angular velocity t = the time
Magnetic Induction
Keep N, B, and A constant, adjust to find the relationship between the and . Theoretically,
i.e. if one plots and together in a graph, and makes as x-axis, as y-axis, one should get a straight line O with a positive slope.
Design of the Project
Design of the Project
Construct an electric generator using Legos
Easiest way to construct
Nonconductive
Design of the Project ď Ž
Spin the magnet inside of the coils
ď ą
It is easier to spin the magnet instead of the coil
Magnet
Design of the Project ď Ž
Coil wraps around 200-300 times
ď ą
Make N large enough to make sure the electricity is not too weak
Coil
Design of the Project
Spin the magnet using a Lego motor
Control angular velocity
Handle/Motor
Design of the Project ď Ž
Measure voltage/current using digital multimeter
ď ą
Connect the two free ends from the coil with the two metal clips of the multimeter
Motivation and Future Engineers
Interesting but easily demonstrated physical property Hope to find a linear relationship between the angular velocity of the magnet and the voltage induced.
Other engineering students can witness the relationship between magnetism and electricity Specifically, how spinning magnets can induce an electric current through a wire.
Project Timeline Date (2009) March 29
Event Meeting to cover initial report and presentation, finalize parts list
March 30 April 3 April 3-6 April 9
Excursion to Lowes to purchase supplies LC 4: Initial report and presentation First peer evaluation LC5: Parts distribution, obtain parts supplied by learning center, build time
April 12 April 16 April 19 April 23 April 25 April 27 April 29 April 30-May 3
Build meeting LC6: Meet with faculty member, build time Final building phase, equation development LC 7: Demonstration Poster construction, final report writing Poster presentation Final report due Second peer evaluation