Switching Arrangement Contact-Free Position Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing switching arrangements in high-voltage and high-current applications face challenges in reliably detecting the insulation state and wear over time, with previous methods being complex, unreliable, or unsafe due to direct contact measurements and potential exposure to high voltages.
Innovation Solution
A contact-free detection system using a magnetic field sensor, such as a Hall sensor, to monitor the position of the switching device and detect wear by measuring the armature's position in a continuous region between separated and bridging positions, ensuring safe and reliable operation without direct contact to high voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct contact measurement is used to detect switching state, then measurement can be performed, but the detector is exposed to high voltage and current which reduces reliability and safety
Solution Approach 1:
The patent introduces a magnetic field as an intermediary medium between the switching device and the detector. The switching device's position is encoded in the magnetic field distribution, allowing the detector to measure position indirectly through magnetic field changes rather than direct electrical contact. This mediator isolates the detector from high voltage while transmitting positional information.
Solution Approach 2:
The patent replaces direct electrical/mechanical contact measurement with magnetic field-based measurement. Instead of using electrical contacts or mechanical linkages that require physical connection to the switching device, the system uses a magnetic field sensor to detect position through non-contact means, eliminating the harmful electrical exposure.
2Ease of operation
If micro-switch is used to sense switching device position, then position detection is achieved, but the system becomes unreliable due to potential breakdown and high voltage exposure
Solution Approach 1:
The patent replaces the mechanical micro-switch system with a magnetic field-based detection system. The micro-switch requires physical contact and mechanical movement which are prone to breakdown, while the magnetic field sensor operates without mechanical contact, eliminating wear and breakdown issues while maintaining position detection capability.
Solution Approach 2:
The magnetic field serves as an intermediary that allows position detection without the detector being directly exposed to the harsh electrical environment. This intermediary protects the detection system from high voltage while still enabling accurate position sensing.
3Ease of operation
If auxiliary relays are used to couple measurement devices to the circuit, then measurement can be performed, but the system becomes very complex
Solution Approach 1:
The patent extracts the measurement function from the complex auxiliary relay system and implements it directly through a magnetic field sensor attached to or near the switching device. This eliminates the need for separate auxiliary relays and complex coupling circuits, simplifying the overall system while maintaining measurement capability.
Solution Approach 2:
The magnetic field sensor serves multiple functions: it detects the switching device position, determines insulation state, and monitors wear conditions. This single component replaces what previously required multiple auxiliary relays and measurement devices, reducing system complexity while enhancing 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
This solution provides a simple, reliable, and safe method to detect the insulation state and wear of switching devices, preventing high voltage or current exposure to the detector and allowing for continuous monitoring of the switching device's position, thereby ensuring reliable operation and extended lifespan.
Implementation Method 1
The detector that performs measurement in a contact-free manner, is a magnetic field sensor, namely a hall sensor
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The invention relates to a switching arrangement (1), in particular for the high-voltage and/or high-current region, with two contacts (3) and a switching device (5), which can be moved into a separated position (I) in which the contacts (3) are electrically separated from one another. The object of the invention is to provide a solution with which it is possible to easily and reliably ascertain whether the switching arrangement (1) is insulated. According to the invention, this is achieved in that the presence of the switching device (5) in the separated position (I) is detected by a contact-free measurement of the position of the switching device (5). A switching arrangement (1) according to the invention comprises a detector (8) with which the presence of the switching device (5) in the separated position (I) can be detected in a contact-free manner