Hall Sensor Actuator Path Limiting
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Solution Overview
Problem
Existing electromechanical actuators require special components and experience high mechanical wear for path limiting, making maintenance monitoring effortful and reducing their service life.
Innovation Solution
Integration of a controller with a Hall sensor system that counts driving cycles and motor current peaks, eliminating the need for mechanical limit switches and allowing for electronic path limiting, enabling simpler maintenance status monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electro-mechanical limit switches are used for path limiting, then the maximum traversing path can be defined, but mechanical wear increases and service life is reduced
Solution Approach 1:
The patent replaces electro-mechanical limit switches with an electronic path limiting system using Hall sensors and a controller. The Hall sensors detect the position of the traversing means through magnetic field interaction without mechanical contact, eliminating wear-prone mechanical components while maintaining precise path limiting capability.
2Manufacturing precision
If mechanical stops are mounted in end positions, then the desired end positions can be maintained, but the current of the drive motor increases sharply causing overcurrent switching
Solution Approach 1:
The patent replaces mechanical stops with an electronic control system that uses Hall sensors to detect traversing means position and a controller to switch off the drive motor before the mechanical end position is reached. This prevents the sharp current increase associated with mechanical impact while maintaining precise end position control.
3Manufacturing precision
If special components are required for path limiting, then defined travel limits can be set, but device complexity and costs increase
Solution Approach 1:
The patent integrates the Hall sensors and controller into the actuator's existing structure, allowing the same electronic components to serve multiple functions: position detection for path limiting, operating time measurement, and load cycle counting. This eliminates the need for separate special-purpose components while maintaining precise travel limit setting capability.
4Ease of operation
If electro-mechanical path limiting means are used, then the traversing means can be stopped at maximum position, but mechanical wear limits the service life
Solution Approach 1:
The patent replaces electro-mechanical path limiting means with an electronic system using Hall sensors and a controller. The Hall sensors detect the position of the traversing means without mechanical contact, and the controller switches off the drive motor to stop the traversing means at the maximum position, eliminating mechanical wear while maintaining operational functionality.
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
Reduces mechanical wear, lowers costs, and extends maintenance intervals by allowing for electronic path limiting and efficient data logging of operating conditions, providing a reliable and cost-effective solution for actuator maintenance monitoring.
Implementation Method 1
at least one Hall sensor which is connected to a controller... the Hall sensor being stationarily arranged in the vicinity of the at least one magnetized section or the at least one magnet
Data Source
Figure 1
AI summary
The actuator (1) has a drive motor (3) arranged at a housing (2). A conversion element (4) i.e. screw-nut system, is propelled by the drive motor. The conversion element comprises a movable traversing unit (5) that is moved in a traverse direction (T). Displacement-limiting parts (6, 7) are utilized to switch off the drive motor when the traversing unit reaches a maximum traverse path, where the displacement-limiting parts are formed as a contactless electronic switching part. The displacement-limiting parts comprise a Hall sensor that is connected with a control unit.