Branch Wiring Arc Detection Using a Single Low-Impedance Circuit
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Solution Overview
Problem
The existing systems for detecting electric arcs in branch wiring require multiple arc detection means for unbranched and branched paths, leading to increased system size and cost.
Innovation Solution
An arc detection device with a low-impedance circuit connected between nodes on first and second wiring, an electric current detector, and an arc determiner that detects high-frequency components indicative of an electric arc, allowing for arc detection without the need for multiple detectors across the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If arc detection means is provided in each of the unbranched path and the branched paths of the branch wiring, then electric arc detection capability is improved, but system size and cost increase
Solution Approach 1:
The patent merges multiple arc detection functions into a single arc detection device by connecting low-impedance circuits at different locations in the branch wiring. Instead of placing separate detection means in each path, the invention combines detection capabilities through a centralized device with multiple low-impedance circuit connections, thereby reducing system size while maintaining comprehensive arc detection coverage across all paths including unbranched and branched paths.
2Reliability
If arc detection means is provided in each of the unbranched path and the branched paths of the branch wiring, then electric arc detection capability is improved, but system cost increases
Solution Approach 1:
The invention reduces system cost by merging multiple arc detection functions into a single arc detection device. The device incorporates multiple low-impedance circuits that can be connected to different locations in the branch wiring, allowing one device to perform the work of multiple separate detection means. This consolidation reduces component costs, installation costs, and maintenance costs while maintaining comprehensive arc detection capability.
Solution Approach 2:
The arc detection device is designed with multi-functionality, capable of detecting electric arcs in multiple locations simultaneously through its multiple low-impedance circuit connections. The single device serves universal detection purposes across the entire branch wiring system, including both unbranched and branched paths, eliminating the need for location-specific detection devices and thereby reducing overall system cost.
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 efficient detection of electric arcs in branch wiring using a single electric current detector, reducing system size and cost while effectively identifying arc occurrences.
Implementation Method 1
an electric arc (i.e., arc discharge) occurs due to damage or the like of such wiring
Implementation Method 2
the low-impedance circuit having impedance lower than impedance of each of the plurality of devices
Implementation Method 3
an electric current detector that detects an electric current flowing through the low-impedance circuit
Data Source
AI summary
An arc detection device includes: a low-impedance circuit connected between a node on wiring connecting the positive electrode of a DC/DC converter and a plurality of DC/DC converters, extending from the positive electrode of the DC/DC converter, and branching toward the plurality of DC/DC converters and a node on wiring connecting the negative electrode of the DC/DC converter and the plurality of DC/DC converters, extending from the negative electrode of the DC/DC converter, and branching toward the plurality of DC/DC converters; an electric current detector that detects an electric current flowing through the low-impedance circuit; and an arc determiner that determines, on the basis of the electric current detected by the electric current detector whether an electric arc has occurred.