Linear Motor Control via Current Feedback Displacement Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor control systems for linear motors, particularly in applications like smartphones and tablet computers, face challenges in accurately tracking and controlling motor states in real-time due to reliance on preset excitation signals, leading to potential uncontrollable consequences.
Innovation Solution
A motor control system utilizing current feedback signals, which includes a control apparatus connected to a linear motor and a current feedback apparatus that converts measured current values into actual displacement values, enabling closed-loop control and real-time adjustment of input signals to maintain a preset state, thereby improving control accuracy and preventing uncontrollable outcomes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a preset motor excitation signal is used to control motor vibration, then the control system is simple to implement, but the motor state cannot be tracked in real time leading to poor control accuracy
Solution Approach 1:
The patent introduces a current feedback apparatus that converts measured current values into actual displacement values and feeds them back to the control apparatus. This closed-loop feedback mechanism enables real-time tracking of motor state while maintaining reasonable system complexity, directly resolving the contradiction between simple implementation and accurate tracking.
2Ease of operation
If a preset motor excitation signal is used, then the control system is easy to operate, but the motor cannot be accurately controlled leading to uncontrollable consequences
Solution Approach 1:
The feedback mechanism continuously monitors actual displacement and compares it with expected values, automatically adjusting control outputs to maintain accurate motor control. This eliminates the need for complex manual adjustments while ensuring reliable operation, resolving the contradiction between ease of operation and control reliability.
3Device complexity
If no current feedback is implemented, then the control system has fewer components, but the system cannot dynamically track motion trajectory changes caused by environmental factors
Solution Approach 1:
The current feedback apparatus provides real-time information about actual motor displacement, enabling the control system to detect and compensate for environmental disturbances. This feedback loop allows the system to adapt to motion trajectory changes while adding minimal complexity, resolving the contradiction between component quantity and environmental adaptability.
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 tracks motion trajectory changes caused by environmental factors, ensuring the linear motor remains in a preset state, enhancing control accuracy and preventing uncontrollable situations by dynamically adjusting input signals based on real-time feedback.
Implementation Method 1
a current feedback apparatus connected to the linear motor and configured to: convert a measured current value of the linear motor into an actual displacement value of the current moment
Data Source
AI summary
The present disclosure relates to a motor control system and method based on current feedback signal. The motor control system includes a control apparatus, a linear motor, and a current feedback apparatus, where an output end of the control apparatus is connected to the linear motor for calculating a displacement error of a previous moment to obtain a control output value of a current moment, and converting the control output value into a voltage signal for transmission to the linear motor; the linear motor is configured to vibrate according to the voltage signal input by the control apparatus; and the current feedback apparatus is connected to the linear motor, and is configured to: convert a measured current value of the linear motor into an actual displacement value of the current moment, and feed back the actual displacement value to an input end of the control apparatus.