Model of electric motor from scrap materials in a few minutes
A long time ago I saw a description of how to make a model of a DC motor literally “on the knee”. Finally, I decided to make this toy on my own and make sure that the motor really turns.
I needed: a wooden block, a pair of clips, an AAA battery (EP), a piece of insulated wire and a magnet. Everything was at home, only the wire had to be rewound from the bay at work (it was possible, of course, to get it from any damaged transformer or choke). My wire is thinish 0.2mm, it would be better thicker - the rigidity of the rotor will be higher. A magnet came up perfectly from a toy like a ratchet "Cicada", bought in the little things shop "All for XX rubles."
At first we wind the coil on any cylindrical object (for example, a felt-tip pen), turns 15-20 is enough. Carefully remove the coil and fasten the coils with instant glue or thread, pieces of wire and so on. The ends of the coils must be left genuine and bend them as in the photo - they serve as the rotor and collector axis. Now the most important moment in building a model is to strip the ends of the coils from isolation, but only on one side!
')
I did it this way: I took the coil with two fingers, holding it vertically, then put the end of the wire on the table and with a knife I cleaned the top part to copper over the entire length. Then he did the same with the second end of the coil, without turning it vertically, that is, the stripped part of the wires must always look in one direction (up).
We straighten the clips and bend to make the holders as in the photo.
With the awl we pierce two holes in the bar at a distance slightly shorter than the length of the battery. I just attached the EA and marked the holes.
Now we collect the motor - we hammer holders deeper into the holes.
We insert an EP between them so that a good electrical contact is formed. So that the element does not jump out of the racks, it is better to grab it with scotch tape. On top of the magnet, I stuck to the racks on both sides and did not need to additionally mount it.
Now gently place our coil on the brush holders. Before laying, it is necessary to straighten the tips of the wires as closely as possible so that they lie on one straight line passing through the center of the coil, otherwise during rotation there will be large beats and the coil will pop out of the holders.
That's what happened in the end.
As you can see in the pictures, really spinning.
If nothing happens, check the quality of wire stripping and the presence of voltage (1.5V) on the brushes. We check this way - when the coil is in one of the vertical positions, a current must flow through it and it will start twitching. If you turn the coil on the axis 180 degrees, then the current should not flow. If it twitches, but does not spin even after a slight jolt, then the magnet pole must be changed.
I recorded ten seconds with a rotating coil on video. You can be sure - all without cheating.
Excellent educational entertainment on the evening of the day. Good luck.
I needed: a wooden block, a pair of clips, an AAA battery (EP), a piece of insulated wire and a magnet. Everything was at home, only the wire had to be rewound from the bay at work (it was possible, of course, to get it from any damaged transformer or choke). My wire is thinish 0.2mm, it would be better thicker - the rigidity of the rotor will be higher. A magnet came up perfectly from a toy like a ratchet "Cicada", bought in the little things shop "All for XX rubles."
At first we wind the coil on any cylindrical object (for example, a felt-tip pen), turns 15-20 is enough. Carefully remove the coil and fasten the coils with instant glue or thread, pieces of wire and so on. The ends of the coils must be left genuine and bend them as in the photo - they serve as the rotor and collector axis. Now the most important moment in building a model is to strip the ends of the coils from isolation, but only on one side!
')
I did it this way: I took the coil with two fingers, holding it vertically, then put the end of the wire on the table and with a knife I cleaned the top part to copper over the entire length. Then he did the same with the second end of the coil, without turning it vertically, that is, the stripped part of the wires must always look in one direction (up).
We straighten the clips and bend to make the holders as in the photo.
With the awl we pierce two holes in the bar at a distance slightly shorter than the length of the battery. I just attached the EA and marked the holes.
Now we collect the motor - we hammer holders deeper into the holes.
We insert an EP between them so that a good electrical contact is formed. So that the element does not jump out of the racks, it is better to grab it with scotch tape. On top of the magnet, I stuck to the racks on both sides and did not need to additionally mount it.
Now gently place our coil on the brush holders. Before laying, it is necessary to straighten the tips of the wires as closely as possible so that they lie on one straight line passing through the center of the coil, otherwise during rotation there will be large beats and the coil will pop out of the holders.
That's what happened in the end.
As you can see in the pictures, really spinning.
If nothing happens, check the quality of wire stripping and the presence of voltage (1.5V) on the brushes. We check this way - when the coil is in one of the vertical positions, a current must flow through it and it will start twitching. If you turn the coil on the axis 180 degrees, then the current should not flow. If it twitches, but does not spin even after a slight jolt, then the magnet pole must be changed.
I recorded ten seconds with a rotating coil on video. You can be sure - all without cheating.
Excellent educational entertainment on the evening of the day. Good luck.
Source: https://habr.com/ru/post/368415/
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