Around a permanent magnet with a rotating shaft, ① the magnet rotates (to generate a rotating magnetic field), ② according to the principle that N poles and S poles attract each other and like poles repel each other, ③ the magnet with the rotating shaft will rotate.
This is the basic principle of motor rotation.
When current flows through a wire, a rotating magnetic field (magnetic force) is generated around it, causing the magnet to rotate. This is actually the same operating state.
In addition, when the wire is wound into a coil, the magnetic force is synthesized to form a large magnetic field flux (magnetic flux), generating an N pole and an S pole.
In addition, by inserting an iron core into the coiled conductor, magnetic lines of force can pass more easily, generating a stronger magnetic force.
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Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
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