The traditional electric vehicle speedometer is mechanical, a typical speedometer is connected to a flexible shaft, there is a wire cable in the flexible shaft, and the other end of the flexible shaft is connected to a certain gear of the transmission, and the rotation of the gear drives the wire cable to rotate, and the wire cable drives the mileage. A magnet in the cover ring rotates, the cover ring is connected with the pointer and the pointer is placed at the zero position through the hairspring. The speed of the rotation of the magnet causes the change in the size of the magnetic field lines, the balance is broken and the pointer is driven. This speedometer is simple and practical and is widely used in various types of battery cars. However, with the development of electronic technology, electronic speedometers have been used in many instruments. A common one is to obtain signals from the speed sensor on the transmission and to deflect the pointer or display numbers through changes in the pulse frequency.

Taizhou Yongchang Instrument Manufacturing Co., Ltd. not only has an electric vehicle speedometer but also a pulsar speedometer and other products, welcome to check our official website.