How the motor rotates: No matter how many patterns the motor has, it all comes down to the basic principle, that is, magnets with opposite poles attract each other and like poles repel each other. When the circular magnet in the middle and the square magnet on the side are in such a position, they are in an unbalanced state. The S pole of the circular magnet in the middle is attracted by the N pole of the square magnet, and the N pole is repelled by the N pole of the square magnet. , so as to rotate counterclockwise until the S pole and N pole approach and then stop.
If we rotate the square magnet along the dotted line, the circular magnet will follow suit. The key to the motor is how to generate two parts that attract each other and rotate under the action of attraction. The rotating part is called the rotor. The rotor will reach balance after rotating by attraction. If you want the rotor to rotate continuously, you need Attract it in a new location. There is another kind of motor, not by the attraction between the poles, but by another property, that is, the magnetic field lines always follow the path of least reluctance. Just like electric current always seeks the path of least resistance.