DC Motors
DC motors are fairly simple to understand. They are also simple to make and only require a battery or dc supply to make them run.
Here are some great sites which describe how DC motors work.
http://www.howstuffworks.com/motor.htm
http://www.members.home.net/rdoctors/ (misc motor information)
There are several types of basic DC motors you can build. They make super science fair projects.
http://www.exploratorium.edu/snacks/stripped_down_motor.html
http://www.hb.quik.com/~norm/motor/
http://members.tripod.com/simplemotor/ (a very clever design of a dc motor with a permanent magnet armature)
http://www.qkits.com/serv/qkits/diy/pages/QK77.asp
http://store.jalts.com/elmogekit.html Check out the SDK200 kit for $24. Looks like a nicely packaged kit.
External links
 | Wikimedia Commons has media related to: Electric motors |
- Electricity museum: early motors
- Electric Motors and Generators, explanations with animations from the University of New South Wales.
- The Numbers Game: A Primer on Single-Phase A.C. Electric Motor Horsepower Ratings, Kevin S. Brady.
- Theory of DC motor speed control
- International Energy Agency (IEA) 4E Annex concerned with Energy Efficiency in Electric Motor Systems
- Interactive Animation of a 3-Phase AC Electric Motor
- Kinematic Models for Design Digital Library (KMODDL) - Movies and photos of hundreds of working mechanical-systems models at Cornell University. Also includes an e-book library of classic texts on mechanical design and engineering.
- How Printed Motors work
- Interactive Java Animation: The Rotating Magnetic Field
- Asynchronous Motor: Explanation of operation
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