The principle of the motor in a vacuum pump is essentially the same as that of a conventional motor, consisting of stator and rotor parts. The torque is generated through electromagnetic induction between the stator and rotor, causing the rotor to rotate. At the same time, the coils in the motor generate a magnetic field that drives the rotor in the same rotational direction and counteracts the rotor's inertia, thereby driving the blades or screws of the pump to rotate.

In electric vehicles, the vacuum pump is primarily used for the braking system. Since electric vehicles are driven by electric motors and lack the traditional source of vacuum, an electric vacuum pump is required to provide a stable vacuum source to ensure the proper operation of the brake assist system.

In a vacuum pump, the motor is not only a core component driving the pump but also an important factor in controlling and maintaining the level of vacuum.