Power assisted bicycle is a new type of two wheeled vehicle, which is a kind of bicycle. It uses battery as auxiliary power source, is equipped with motor, and has power assist system. It can realize the integration of human riding and motor assisted.
In the field of power assisted bicycles, the installation positions of motors are mainly divided into two types. One is the middle position, that is, the motor installed at the middle position of the body, that is, the five-way position, which is called the middle motor. The middle motor is connected to the frame and is connected to the rear wheel through a chain to transmit power. At the same time, foot pedals are installed on both sides of the motor. In the case of no power supply for the motor, the rider can ride manually by foot pedals. The resistance is no different from that of a normal bicycle.
The other is installed in the wheel hub of the bicycle, called the wheel hub motor. Compared with the hub motor, the central motor has greater advantages in technology and performance.