Series arc detection in a DC / AC power converter

FR3165504A1Pending Publication Date: 2026-02-13SAFRAN ELECTRICAL & POWER
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Patent Information

Application Number
FR2024008802
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-08-08
Publication Date
2026-02-13

AI Technical Summary

Technical Problem

Existing methods for detecting series electric arcs in DC/AC power converters are inefficient, complex, costly, and require modifications to pre-existing power supply devices, making them unsuitable for widespread implementation in aircraft propulsion systems.

Method used

A monitoring circuit comprising an AC/DC converter and a detection circuit is integrated into the power supply device to detect series electric arcs by analyzing voltage drops at the DC/AC power converter's midpoints, using a simple and compact design that can be applied to pre-existing systems without modification.

Benefits of technology

The solution effectively detects series electric arcs, preventing fires and thermal runaway with minimal added mass and complexity, while being cost-effective and compatible with existing power converters.

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Abstract

Power supply device (23) comprising: a DC / AC power converter (24) arranged to produce at least one AC output voltage (Va) from a DC input voltage (Ve); a monitoring circuit (35) comprising: an AC / DC converter (36) arranged to produce a monitoring voltage (Vsur) from at least one AC output voltage; a detection circuit (37) arranged to detect the occurrence of a series electrical arc in the DC / AC power converter from the monitoring voltage. Figure 8
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Citation Information

Patent Citations

  • ELECTRICAL ARC DETECTION IN AN ELECTRICAL NETWORK

    FR3102892A1

  • Electric arc detection using Bragg grating

    FR3133452A1

  • Misfiring detector in three-phase bridge inverter

    JP1982000078A

  • Ballast with an arc quenching circuit

    US20130175939A1