When riding an electric vehicle, the handle of the electric vehicle is always in use. The structure and principle of different types of handles are different. The adjustable potentiometer of the traditional handle is realized by using an adjustable resistance, while the potentiometer is a ring with contact friction. After a long time of use, there will be relatively large wear, which is likely to lead to poor contact and damage. At present, the handle is no longer used in electric vehicles.

The handle of the electric vehicle uses magnets and linear Hall to imitate the linear signal of the potentiometer. Hall elements generally use 49E and the like. When the magnetic field applied to the Hall element changes, the Hall element will output a continuously adjustable voltage signal, which is directly connected to the controller to change the motor speed, so as to change the vehicle speed.

Magnetic steel is generally installed on a circular ring at the end of the handle. When the handle rotates, the magnet rotates along with the direction of rotation of the handle. There are currently two types of magnets, one is a single arc length type. The magnetic field strength on the surface of the magnet varies in different positions and sizes. The sensing surface of the Hall element is slightly away from the magnetic steel. When the position of the magnetic steel changes, the magnetic field strength applied to the Hall element will change, and the voltage output by the Hall element will change. Magnets are basically made of rare earth materials, which are relatively expensive due to their long length. However, this design has good linearity and consistency.