Asee peer logo

Design And Fabrication Of A Low Voltage Direct Current Electric Motor

Download Paper |

Conference

2003 Annual Conference

Location

Nashville, Tennessee

Publication Date

June 22, 2003

Start Date

June 22, 2003

End Date

June 25, 2003

ISSN

2153-5965

Conference Session

Lab Experiments in Materials Science

Page Count

3

Page Numbers

8.365.1 - 8.365.3

Permanent URL

https://peer.asee.org/12273

Download Count

76

Request a correction

Paper Authors

author page

John Marshall

Download Paper |

Abstract
NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Session 3264

Design and Fabrication of a Low Voltage Direct Current Electric Motor

Dr. John Marshall University of Southern Maine

Introduction

This is an excellent design and fabrication project that can be used in introductory engineering classes to teach motor principles as well as material selection. The basic concept of this activity was originally developed by Beakman’s World, and I have improved it over the past ten years while teaching motor principles at the university level. Standard Radio Shack materials can be used.

The primary objective of this project is to gain an understanding of electric motor principle, and the materials needed to convert electricity and magnetism into motion. Key words related to this project include: conductors; insulators; enamel; magnetism; electromagnet; and motor principles. Only a very basic knowledge of electricity and magnetism are need as a prerequisite.

When being utilized as a “materials” experiment, students can experiment with conductors other than copper (such as aluminum and steel) and detect slower (less efficient) motor operation.

Low Voltage Direct Current Electric Motor Operation

Heavy gauge copper wire is used to fabricate the coil cradle, and the cradle is attached to a standard “D” size battery with elastic bands. After winding the motor coil, we remove insulation from two locations with sandpaper and assemble the device.

When the un-insulted parts of the coil make contact with the cradle, current flows through the coil, making it into an electromagnet. Since magnets attract, the coil attempts to align itself with the magnet. However, when the coil turns to face the magnet, contact is broken, and the magnetic field collapses. Inertia causes the coil to continue around until contact is reestablished and the process repeats itself. In other words, the motor revolves continuously.

Proceedings of the 2003 American Society for Engineering Education Annual Conference & Exposition Copyright 2003, American Society for Engineering Education

Marshall, J. (2003, June), Design And Fabrication Of A Low Voltage Direct Current Electric Motor Paper presented at 2003 Annual Conference, Nashville, Tennessee. https://peer.asee.org/12273

ASEE holds the copyright on this document. It may be read by the public free of charge. Authors may archive their work on personal websites or in institutional repositories with the following citation: © 2003 American Society for Engineering Education. Other scholars may excerpt or quote from these materials with the same citation. When excerpting or quoting from Conference Proceedings, authors should, in addition to noting the ASEE copyright, list all the original authors and their institutions and name the host city of the conference. - Last updated April 1, 2015