2. INDEX
Contents ..................................................................
...............pg3
Inside an electric
motor........................................................pg4
History ......................................................................
..............pg5
Examples .................................................................
...............pg6
Resume ...................................................................
.................pg7
Bibliography .............................................................
..............pg8
3. CONTENTS
1 Inside an Electric Motor
2 History
3 Examples
4 References
4. INSIDE AN ELECTRIC MOTOR
Let’s start by looking at the overall plan of a simple two
electric motor. A simple motor has six parts: • Armature or
rotor • Commutator • Brushes • Axle • Field magnet • DC
power supply of some sort. An electric motor is all about
magnets and magnetism: A motor uses magnets to create
motion. If you have ever played with magnets you know about
the law of all magnets: Opposites attract and likes repel. So if
you have two bar magnets with their ends marked ,north, and
south, then the north end of one magnet will attract the south
end of the other. Inside an electric motor, these attracting and
repelling forces create rotational motion.
5. HISTORY
In 1821, Michael Faraday made the first electric motor. It
worked using the force of magnetism.
He created a simple electromagnet by taking a nail and a
wire, wrapping about 100 loops of wire around the nail and
connected it to a battery. With this he had a
simple electromagnet with north and south pole. In the middle
of the nail he made a hole and put a spindle into the hole so
that the nail could rotate.
6. EXAMPLES
Examples of electric motors include: fans, washing machines,
fridges, pool pumps, vacuum cleaners and fan ovens.
7. RESUME
Michael Faraday invented the electric motor.
An electric motor changes electrical energy into mechanical
movement. A electric generator does the reverse: it changes
mechanical movement into electric energy. Most of the
electric motors work by using the force of magnetism. But, an
electric motor may work using different types of forces.
