Electric Motor Control for Tire Mounting Torque Adaptation
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Solution Overview
Problem
Existing methods for mounting and demounting tires from rims lack the ability to automatically adjust torque and speed according to the stiffness of different tire types, potentially causing damage during the process.
Innovation Solution
An electric motor system that automatically detects when high torque is required and applies a high torque peak by changing the motor current frequency and amplitude, simulating operator input to ensure appropriate torque and speed for various tire types, thereby preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electric motor operates at constant speed and torque, then the basic mounting and demounting operations can be performed, but tyres with high stiffness (e.g., run flat tyres) cannot be properly handled due to insufficient torque at low speed
Solution Approach 1:
The motor control system dynamically adjusts speed and torque based on real-time feedback from current sensors. When high current draw indicates high torque demand, the system automatically reduces speed and increases torque output, adapting to different tire stiffness requirements without manual intervention.
Solution Approach 2:
The system continuously monitors motor current as an indicator of torque demand and uses this feedback to automatically adjust operating parameters. The control device detects when current exceeds a threshold for a predetermined time and responds by modifying speed-torque characteristics to match the actual tire requirements.
2Force
If the motor speed is reduced to increase torque for stiff tyres, then high torque can be applied, but the overall productivity decreases due to slower operation
Solution Approach 1:
The system maintains high productivity by dynamically adjusting speed-torque characteristics only when necessary. During normal operations with standard tires, the motor operates at high speed with常规 torque. When torque demand exceeds thresholds indicating stiff tires, the system automatically transitions to low-speed high-torque mode, minimizing impact on overall productivity.
Solution Approach 2:
The control system changes motor operating parameters (speed and torque) based on detected conditions. By monitoring current draw and operational patterns, the system adjusts parameters to match actual requirements, maintaining optimal productivity while providing necessary torque when needed.
3Force
If manual pedal activation is used to increase torque, then high torque can be applied on demand, but the operator cannot consistently detect and respond to varying torque requirements of different tire types
Solution Approach 1:
The system replaces manual operator judgment with automated feedback-based control. Current sensors continuously monitor motor load, and the control device automatically detects when torque peaks are needed based on current thresholds and operational patterns, eliminating variability in human response and providing consistent automated torque adjustment.
Solution Approach 2:
The system performs self-adjustment of torque based on its own operational parameters. By monitoring its own current draw and speed, the motor control system automatically determines when and how much torque is needed, making the system self-regulating without requiring external operator intervention.
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
The system effectively adjusts torque and speed to suit different tire types, preventing damage during mounting and demounting operations by autonomously detecting torque requirements and applying a high torque peak when necessary.
Implementation Method 1
an electric motor which rotates a wheel (rim/tyre assembly) about an axis
Data Source
AI summary
The invention relates to a method for controlling a current fed to an electric motor during an operation to mount a tire on a rim of a wheel including the tire and the rim, or to demount the tire from the rim. The wheel is rotated by an electric motor about an axis, and the motor current fed to the electric motor is controlled dependent on the rotational speed and torque required for the mounting and/or demounting operation. The motor current is automatically changed to cause the electric motor to apply a high torque peak to rotate the wheel, when the motor current is measured to be greater than a preset limit at a low rotational speed during a preset time. Furthermore, the invention relates to an apparatus for mounting a tire on a rim or demounting the tire from the rim.