The DC brushed motor is a common electric motor that works on the principle of electromagnetic induction and the flow of electric current. It consists of a fixed magnet (called the stator) and a coil that can rotate (called the rotor).
When current flows through the stator coil, a magnetic field is generated in the stator. The polarity of the magnetic field changes with the direction of the current. There is a pair of brushes on the rotor that contact the electrodes of the rotor coil.
When the current passes through the brush and enters the rotor coil, the coil will be subjected to a torque due to the effect of the magnetic field, causing the rotor to start rotating. When the rotor rotates to a certain angle, the brush will contact another set of electrodes, and the direction of the current will change. In this way, the polarity of the magnetic field will also change, continuing to drive the rotor to rotate.
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