1. DC Motors Name: Gupinder Kler

2. Objective: Objective is to teach how a DC motor works

3. Typical DC Motor

4. Parts of Motor Armature Commutator Brushes Axle Field Magnet DC Power Supply

5. How it works: Opposites attract, likes repel 1. When the coil is powered, a magnetic field is generated around the armature 2. The armature continues to rotate. 3. When the armature becomes horizontally aligned, the commutator reverses the direction of current through the coil, reversing the magnetic field. The process then repeats.

6. How the Speed Varies The trigger which is a variable speed switch The trigger switch limits current

7. References http://en.wikipedia.org/wiki/Electric_motor http://electronics.howstuffworks.com/motor1. htm http://electronics.howstuffworks.com/motor1. htm http://homepages.which.net/~paul.hills/Speed Control/SpeedControllersBody.html http://homepages.which.net/~paul.hills/Speed Control/SpeedControllersBody.html