Power assisted bicycle power control system and double-control electric power assisted bicycle

Abstract

The invention discloses a power-assisted control system for a power-assisted bicycle, which comprises a sensor, a gear adjusting device, a central processor and a power-off brake control device, wherein the central processor comprises a gear control device, a power output control device, an overspeed signal control device and a power off and gear reset control device; the gear control device is matched with the gear adjusting device and triggers to realize cycling gear adjustment through the gear adjusting device; the power output control device is matched with the overspeed signal control device to realize output corresponding power assisted power and overspeed power-off protection according to setting of gears; and overspeed control signals directly acquire motor speed through a speed sensor in a motor and can accurately judge whether the running speed is overspeeding or not and improve running safety. The power-assisted control system for the power-assisted bicycle has the advantages of improving riding comfort, saving electricity and the like. The invention also discloses a double control electric power-assisted bicycle formed by the power-assisted control system.

Description

technical field [0001] The invention relates to a control system of an electric power-assisted bicycle, in particular to a power-assisted control system of an electric power-assisted bicycle, and also relates to a dual-control electric power-assisted bicycle constituted by the power-assisted control system. Background technique [0002] At present, electric power-assisted bicycles have gradually become people's favorite short-distance transportation tools due to their environmental protection and energy-saving features. On an electric power-assisted bicycle, a power-assisted control system is usually installed. The power-assisted control system includes a speed sensor and a power-assisted control device. The speed sensor is installed on the central shaft or the front wheel, and the power-assisted control device is activated by judging the speed of the central shaft or the front wheel. And output the assist power according to the set assist ratio, so as to realize the riding ...

AI Technical Summary

Problems solved by technology

When the system needs to ride fast, the rider must step on the pedal quickly, and the sensor can collect the signal that needs to ride at a high speed; the system is a proportional power control system (such as 1:1 to 1:2.5) , it is necessary to use a dedicated speed sensor (because the different signal waveforms output by different types of sensors from different manufacturers will affect the change of the assist ratio), resulting in the control system being incompatible with different types of speed sensors; the overspeed control principle of the system is to determine the current When the ratio of the speed of the wheel to the speed of the center shaft is greater than the ratio of the number of teeth of the sprocket to the number of teeth of the flywheel, the power supply of the motor is cut off. This control principle is cumbersome, and it is not easy to meet the requirement of cutting off the power supply of the motor at an overspeed of 25km / h as required by regulations.

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