Linear Motor Closed-Loop Control via Positioning Sensor
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Solution Overview
Problem
Conventional linear motors with open-loop control are prone to performance inconsistencies due to manufacturing deviations and wear, leading to potential failures in control algorithms.
Innovation Solution
A motor design incorporating a housing with stoppers, a vibrator, a power coil, and a positioning sensor that adjusts the reciprocating motion of the vibrator based on feedback signals, enabling closed-loop control and high precision despite manufacturing inconsistencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If open-loop control is used in conventional linear motors, then the control algorithm can be set in advance and the system is simplified, but the control performance becomes unreliable due to manufacturing inconsistencies and wear
Solution Approach 1:
The patent introduces a positioning sensor that detects the actual position of the vibrator and feeds this information back to the control unit. The control unit compares the detected position with the target position and adjusts the driving signals accordingly, forming a closed-loop control system. This feedback mechanism enables the system to compensate for manufacturing deviations and wear, significantly improving control reliability while maintaining acceptable complexity.
2Reliability
If closed-loop control is implemented with positioning sensor, then control reliability and precision are improved, but device complexity increases
Solution Approach 1:
The positioning sensor provides real-time position feedback to the control unit, enabling closed-loop control that compensates for manufacturing variations and wear. The control unit processes the feedback signal and adjusts driving signals accordingly, achieving high reliability without excessive complexity.
Solution Approach 2:
The patent replaces complex mechanical positioning and adjustment mechanisms with an electronic feedback control system. The positioning sensor and control unit work together to achieve precise control through electronic signal processing rather than mechanical means, reducing overall system complexity while maintaining high reliability.
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 motor achieves reliable closed-loop control and high precision by using a positioning sensor to adjust the motion of the vibrator between stoppers, effectively mitigating the impact of manufacturing deviations and wear, resulting in improved motion control and accuracy.
Implementation Method 1
the positioning sensor is a hall sensor
Implementation Method 2
The auxiliary coil and/or the power coil act on the vibrator so as to adjust the reciprocating motion of the vibrator
Data Source
AI summary
The present application discloses a linear motor having a housing with an accommodation space, stoppers fixed on the housing and set at intervals, a vibrator sliding between the stoppers and a power coil driving the vibrator to reciprocate motion. The stopper includes a first iron core fixed on the housing and an auxiliary coil twinned on the first iron core. The motor also includes a positioning sensor used to sense the motion of the vibrator to obtain a feedback signal. According to the feedback signal detected by the positioning sensor, the auxiliary coil and/or the power coil act on the vibrator so as to adjust the reciprocating motion of the vibrator between the stoppers. The effect of the motion of the plan of present application is good and control precision is high.