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In our normal work and daily life, DC motors are used extremely widely, and there is a great deal of physical knowledge involved in their design, which is worth studying and innovating upon by many people. As the beneficiaries, we don’t necessarily need to have an in-depth understanding of motors, but it’s still useful to know some basic knowledge; otherwise, how can we understand how to use them and what the steps are? Next, let’s take a look at the working principle of the components of the DC motor in micro reduction motors. The reason why a DC motor can keep rotating in one direction is that it has ring-shaped permanent magnets inside, which create a magnetic field. When an electric current flows through the coils, the Lorentz force is generated. If the coils rotate parallel to this magnetic field, the direction of the magnetic field changes, and it is this force that causes the motor to start rotating. As long as the direction of the Lorentz force remains unchanged, the DC motor will continue to rotate. In addition to utilizing this principle, there are other aspects related to DC motors, but none of them are as easy to understand as this one. DC motors are used more widely; they provide the driving force for boiler feeders, and they are also found in many industrial and transportation sectors, such as urban trams, cable equipment, and large precision machine tools. Our analysis simplifies the DC motor; in reality it’s of course more complex, but that doesn’t prevent us from understanding it. It’s basically that simple. If one puts in the effort to study it, they will gain a great deal from it and experience a strong sense of achievement.