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Making a Simple D.C. Electric Motor
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Apparatus
needed
1 wine bottle cork (4cm
long)
2 nails (1½ mm × 25mm)
2 flat magnets
Insulated copper wire
(about ½ mm diameter)
1 piece of cardboard
"Scotch" tape
Paper clips |
Tools
needed
Scissors
Wire cutters/strippers |
|
Some advice on the
construction of the motor |
| 1. |
Make the cardboard
frame first (see figure 1); then put in place the brushes (which
must be curved as shown in figure 3). |
| 2. |
Make sure that the
nails are in the centre of the cork. |
| 3. |
The coil of wire
should have at least 8 turns (more if possible). The wire must
be wrapped tightly round the cork. The exposed ends of the coil
must be as close to the nail as possible (but must not
touch the nail).
|
| 4. |
When the coil has been
made, hold it in place using "scotch" tape (or
similar). |
|
In figure 1, a
full line means CUT and a dotted line means FOLD.
Dimensions are in mm. |
|
figure 1 |
|
figure 2 |
| |
|
 |
 |
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The motor from above |
View of brushes |
|
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Figure 3, below, shows the approximate positions
of the brushes before and after the rotor is put in place |
|
figure 3 |
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© David
Hoult 2008 |
The
Open Door Web Site