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

Freshman Year Final Project