E-Bike Dual Control Switching Between Velocity and Torque Drive
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric bicycles are limited by either velocity-type or torque-type sensors, which result in inadequate performance under various riding conditions, such as complex roads or load-bearing scenarios, leading to suboptimal riding experiences.
Innovation Solution
A dual-control system integrating a dual-driven algorithm controller and a bilateral single-direction signal magnetic detection torque sensor, capable of switching between velocity and torque modes, utilizing a communication module, signal acquisition modules, and a field-oriented control motor control module to adapt power output to rider needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a velocity sensor is used in the electric bicycle system, then the response speed is relatively fast and the riding experience on flat roads is good, but the torque output is insufficient causing abnormal noise and overheating under complex road conditions or load-bearing scenarios
Solution Approach 1:
The system dynamically switches between velocity control mode and torque control mode based on real-time riding conditions. The controller adjusts the control mode according to the detected riding state, enabling the system to adapt its characteristics to match the current operational requirements, thus resolving the contradiction between fast response and reliable operation under different conditions
Solution Approach 2:
The system changes the control parameter from velocity to torque based on the riding conditions. By detecting the current riding state and switching the control parameter accordingly, the system achieves fast response on flat roads through velocity control and reliable torque output on complex terrains through torque control, eliminating motor overheating and noise issues
2Force
If a torque sensor is used in the electric bicycle system, then the torque output is sufficient for climbing and load-bearing, but the instantaneous acceleration performance is weak and the riding experience on smooth roads is not smooth
Solution Approach 1:
The system dynamically adjusts the control mode between torque control and velocity control based on real-time riding conditions. When detecting smooth road conditions or acceleration scenarios, it switches to velocity control mode for smooth and responsive acceleration. When detecting climbing or load-bearing conditions, it switches to torque control mode for sufficient torque output, thus resolving the contradiction between torque output and acceleration performance
Solution Approach 2:
The system changes the control parameter from torque to velocity based on riding conditions. By detecting the current riding state and switching the control parameter accordingly, the system achieves smooth acceleration on flat roads through velocity control and sufficient torque on complex terrains through torque control
3Adaptability or versatility
If a dual-control system integrating both velocity and torque control is implemented, then the adaptability to different riding conditions is improved, but the device complexity increases
Solution Approach 1:
The control system is designed with multi-functionality to handle both velocity control and torque control modes within a single integrated controller. This universal controller can detect riding conditions and automatically switch between control modes, providing adaptability to different riding scenarios while avoiding the need for separate control systems for each mode, thus managing device complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances riding experience and adaptability by providing accurate and synchronized motor power output, ensuring smooth operation under diverse conditions, with improved direction detection and sensor durability, and allowing flexible mode selection.
Implementation Method 1
a bilateral single-direction signal magnetic detection torque sensor, configured to convert the twist deformation of a bottom bracket in a pedal of an electric bicycle into electrical signals
Data Source
AI summary
A dual-control system for an electric bicycle and a switching method for velocity and torque drive for an electric bicycle are disclosed. A dual-driven algorithm controller provided by the present application receives instructions from an instrument communication signal module, interacts with a bilateral single-direction signal magnetic detection torque sensor to obtain velocity signals or torque signals, and then outputs a corresponding velocity or torque through a field oriented control (FOC) motor control module; and the bilateral single-direction signal magnetic detection torque sensor is configured to convert the twist deformation of a bottom bracket in a pedal of an electric bicycle into electrical signals.