Bicycle performance assisting arrangement, has electronic controller to control voltage supply to electric motor based on rotation of magnet ring that rotates with planetary gear, where ring rotation is sensed by Hall-effect sensors

摘要

The arrangement has an electric motor (1), a control gear (2), and an electronic controller (3), which are arranged around a central axle (4). Hall-effect sensors are arranged proximal to a magnet ring (9) that rotates with a planetary gear. The sensors output signals based on the rotation of the ring due to the planetary gear rotation to the controller, which controls the voltage supply to the motor based on the signals.