No matter what brand of electric power assist system, the essence is to convert electric energy into kinetic energy and apply it to the bicycle transmission system, making riding easier and less laborious.
When the electric power assist system works, the sensor transmits the detected speed, cadence, torque and other data to the controller, and the controller issues the command control to make the motor run. It is worth mentioning that most of the motors do not directly act on the transmission system. The motor outputs power with high speed and low torque. It needs to be amplified by the deceleration system to make the output speed close to the cadence of the human leg (the center motor). ) or the speed of the wheel set (in-wheel motor).