An adaptive electric power-assisted bicycle control system and method

Abstract

The invention specifically discloses an adaptive electric power-assisted bicycle control system and method. An adaptive electric power-assisted bicycle control system includes a data acquisition unit; The pedal rotation direction and brake pressure information detect whether the bicycle is in a state that does not need power assistance. If it is judged that the rider has selected the power assist mode, the power assist work will be performed according to the power assist mode selected by the rider. information, seat load information, pedal cadence information, motor current information and pedal torque information to calculate the current motor rotation speed and torque, and then obtain the slope information of the riding road to control the motor and transmission mechanism for assisting work. The invention has the advantage of automatically calculating the motor output to meet the rider's riding needs.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to an adaptive electric power-assisted bicycle control system and method. Background technique [0002] The electric bicycle intelligent assist technology is aimed at the application of high-end assist bicycles (mainly mountain bikes and road models). The task it needs to solve is how to combine manpower and electricity to form power mutual sensing. The main function is to improve the rider's comfort, reduce the wear and tear of the motor, and increase the service life of the motor. [0003] Existing boosting technologies usually use the following methods: [0004] 1. The way that the existing power assist technology usually adopts is that manpower (pedaling) rotates the center shaft, the fixed magnetic body on the center shaft wheel rotates with the center shaft wheel, and the magnetic body follows the rotation of the center shaft wheel to the center shaft. When the posit...

AI Technical Summary

Problems solved by technology

[0004] 1. The way that the existing power assist technology usually adopts is that manpower (pedaling) rotates the center shaft, the fixed magnetic body on the center shaft wheel rotates with the center shaft wheel, and the magnetic body follows the rotation of the center shaft wheel to the center shaft. When the positions of the components overlap, the Hall element fixed on the central shaft connector is triggered, and the Hall element conducts the motor switch circuit, and then the motor rotates; in this case, only one Hall element collects the trigger signal and switches the switching mode. When the power is turned on, the current has no transition process, and the current jumps directly from nothing to the current. Instantly turning on the power can easily cause the gears of the reduction gear of the toothed high-speed motor to occlude and collide.

At present, the deceleration gears of the (small) permanent magnet DC brushless toothed high-speed motors dedicated to electric vehicles are all transmission gears made of plastic, and their service life and reliability are poor. Advanced power sensing technology is an unfavorable factor for the service life of toothed high-speed motors

[0005] 2. The existing booster technology will produce no instantaneous high-current discharge when directly switching the circuit. Under the impact of high-current discharge, the lithium battery will shorten the battery life and mileage.

[0006] 3. The existing power assist technology only has the recognition function of identifying the power switch on or off signal. The controller controls the motor switch according to the switch signal output command. Since the magnetic body rotates with the center shaft wheel to coincide with the position of the Hall element The position is only triggered once, so the switch signal sent by the controller is intermittent, and the motor also outputs power intermittently, because the previous power sensor technology does not have the ability to recognize speed changes, and cannot judge the rider's riding ( The state of pedaling the central axis roulette) is the rotation frequency of the central axis roulette, so the controller cannot control the output power (power) of the motor according to the rotation frequency of the central axis roulette, and cannot achieve the best motor output power and effective Effort-saving boost state

[0007] 4. The existing power assist technology does not have the ability of dynamic slope recognition, which makes the rider feel tired when going uphill, and cannot achieve the best motor output power and effective and labor-saving power assist state

Images