Magnetic Position Limiting Device for Motor Control
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Solution Overview
Problem
Traditional position limiting devices for motors, which use multiple switches or electrodes, result in complex wiring and maintenance issues, and fail to accurately control movement when these components are damaged, leading to inaccurate motor operation.
Innovation Solution
A position limiting device incorporating a magnetic element, a detecting element, and a controller that uses magnetic field intensity signals to control the motor, allowing for accurate boundary detection and correction of rotation numbers, even in the absence of functional switches or electrodes, thereby simplifying the system and ensuring precise motor control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two position limiting switches or electrodes are disposed on every axis in a traditional position limiting device, then the boundary position can be detected, but the wires inside the moving module become complicated and maintenance becomes difficult
Solution Approach 1:
The patent replaces mechanical switches and electrodes with a magnetic field-based detection system. A magnetic element is disposed at the center of the moving module, and a detecting element detects its magnetic field to determine position. This substitution eliminates the need for complex wiring associated with multiple switches and electrodes, while maintaining reliable boundary position detection capability.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the position limiting device and the detection system. The magnetic element generates a magnetic field that extends beyond the moving module boundaries, and the detecting element uses this field to sense position without direct mechanical contact or complex wiring. This intermediary approach simplifies the system while preserving detection functionality.
2Reliability
If position limiting switches or electrodes are used, then boundary detection is possible, but when these components fail or are damaged, the device is out of function and motor control becomes inaccurate
Solution Approach 1:
The patent replaces fragile mechanical switches and electrodes with a magnetic field-based system that is more tolerant to failure. The magnetic element and detecting element configuration provides redundant detection capability, and the magnetic field itself serves as a robust signal source that is less susceptible to damage and failure compared to mechanical contacts.
Solution Approach 2:
The magnetic field generated by the magnetic element automatically serves as the detection signal source. The system uses its own inherent magnetic field properties to provide position information, eliminating the need for separate switching mechanisms that can fail. The magnetic field naturally extends beyond boundaries and provides continuous position feedback without requiring additional active components.
3Reliability
If multiple switches and electrodes are installed for position limiting, then boundary control can be achieved, but the system requires frequent maintenance due to wire disconnection and component failure
Solution Approach 1:
The patent replaces the mechanical switch and electrode system with a magnetic field-based detection system that eliminates complex wiring. The magnetic element disposed at the center and the detecting element that senses its field create a contactless detection mechanism, removing the wires that are prone to disconnection and the mechanical contacts that require frequent maintenance.
Solution Approach 2:
The patent extracts and removes the problematic wiring and mechanical contact components from the system. By using a magnetic field that naturally extends beyond the moving module boundaries, the system eliminates the need for physical wires and switches, thereby removing the sources of maintenance issues while preserving position control accuracy.
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 solution simplifies the internal wiring of the position limiting device, enhances maintenance, and ensures accurate motor control by using a magnetic field-based system that can function even when traditional switches or electrodes fail, preventing motor over-rotation and maintaining precise boundary limits.
Implementation Method 1
the detecting element is configured to detect a magnetic field generated by the magnetic element, and correspondingly generate and transmit a magnetic field intensity signal
Data Source
AI summary
A position limiting device includes a magnetic element, a detecting element, a motor, and a controller. The magnetic element is disposed in the center of the position limiting device, the motor is coupled to the detecting element, and the controller is electrically coupled to the detecting element and the motor. The detecting element is configured to detect magnetic fields generated by the magnetic element, and correspondingly generate and transmit a magnetic field intensity signal. The controller is configured to receive and process the magnetic field intensity signal to obtain a magnetic field intensity value. In addition, the controller is further configured to compare the magnetic field intensity value and a magnetic field intensity boundary value. When the magnetic field intensity value is less than the magnetic field intensity boundary value, the controller drives the motor so that the motor makes the detecting element to move correspondingly to the magnetic element.