High School Science Project: DC Motor Construction
Copyright © 2004 Francis J. Martino

Hello
For a school project in grade 11 I need to build a small DC motor
with a armature...I was wondering if you could send me information on
how to do this in the best possible way. It would be wonderful
if you could send me a diagram of a DC motor with a armature, and
explain what materials are needed to build it so I may do so.
What each part does.
Thanks a bunch
Elisa

Dear Elisa,
Basic construction of a DC motor is given here:
http://www.tpub.com/content/doe/h1011v2/css/h1011v2_81.htm

You will find brushless DC motors as you search the internet, however,
you will need to build a motor that requires brushes.

The field (permanent magnet or electromagnet) supplies a magnetic field
through which the armature conductors rotate. As the conductors rotate
through the field, an AC current is induced in the conductors.
Refer to Lenz's Law.

The armature has a commutator segment attached to each armature coil.
The commutator and brushes allow the current to be changed from AC to DC
by the mechanical construction.

Best Regards,
Frank

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