Arc Detection Device Using Hall Sensor Current Spectrum Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing arc detection systems for high-voltage components in electric and hybrid vehicles are inadequate in quickly identifying arcs between current-carrying elements and conductive elements, which can lead to fires and safety hazards.
Innovation Solution
A detection device comprising a measuring device to monitor current and an analysis device that determines the frequency spectrum to detect arcs in the high-frequency range, allowing for immediate countermeasures such as interrupting the power supply by closing a switch or tripping a fuse, and utilizing a common-mode filter to differentiate between arcs occurring between elements or between elements and the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high-frequency receiver is used to detect arcs based on electromagnetic waves, then arc detection capability is provided, but detection speed and reliability are insufficient for high-voltage components
Solution Approach 1:
The patent replaces electromagnetic wave-based detection with current-based detection using Hall sensors. By measuring current flow through the cable and analyzing its frequency spectrum, the system achieves both high reliability and fast detection speed, eliminating the limitations of electromagnetic wave reception.
Solution Approach 2:
The patent transforms the detection approach by changing from detecting electromagnetic wave parameters to analyzing current frequency spectrum parameters. The Hall sensor measures current, and the analysis device examines frequency components above 2 kHz, where arc-induced current fluctuations manifest, providing reliable and rapid detection.
2Measurement precision
If current measurement and frequency spectrum analysis are implemented, then detection precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces a Hall sensor as an intermediary device that non-invasively measures current through the cable. This intermediary approach enables precise frequency spectrum analysis of arc-induced current fluctuations without requiring direct contact or complex wiring modifications, maintaining measurement precision while controlling device complexity.
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
Enables rapid detection and mitigation of arcs, reducing the risk of fires and electric shocks by quickly identifying and responding to high-frequency spectral changes, thereby enhancing safety.
Implementation Method 1
the at least one measuring device comprises a Hall sensor
Implementation Method 2
a high-frequency receiver which detects the arc on the basis of an electromagnetic wave transmitted from the electrical cable
Data Source
AI summary
The invention relates to a detection device (100) for detecting an arc (104a-i; 909) occurring between a first current-carrying element (103; 903a) and at least one conductive element (103b, 108; 903b, 907), comprising at least one measuring device (101; 901, 902), which is designed to measure a current (I) flowing through the first current-carrying element (103a; 903a), and an analysis device (102) which is designed to determine a frequency spectrum of the measured current (I) and to detect the arc (104a-i; 909) occurring between the first current-carrying element (103a; 903a) and the at least one conductive element (103b, 108; 903b, 907) on the basis of a high-frequency range of the determined frequency spectrum.