Aircraft electrical distribution system

The electrical distribution system addresses the challenges of reverse current flow and thermal dissipation in aircraft systems by using contactors and decision elements to manage generator malfunctions, ensuring continuous power distribution and efficient power management.

FR3167262A1Pending Publication Date: 2026-04-10SAFRAN ELECTRICAL & POWER
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Patent Information

Application Number
FR2024010656
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-10-03
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

Existing aircraft electrical distribution systems face challenges with high-voltage direct current (HVDC) generators due to the size, mass, and thermal dissipation issues of blocking diodes, which are not ideal for aeronautical applications, and lack controlled operation for preventing reverse current flow during generator malfunctions.

Method used

An electrical distribution system with disconnecting devices comprising contactors, measurement systems, and decision elements that measure current intensity and direction to switch contactors to prevent reverse current flow, using contactors and pyroswitches for additional safety, and a programmable logic controller for fine-tuned control.

Benefits of technology

Ensures continuous electrical distribution by disconnecting malfunctioning generators, avoiding thermal dissipation and additional components, allowing controlled disconnection times, and integrating with central aircraft control systems for efficient power management.

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Abstract

Aircraft electrical distribution system. Electrical distribution system (1) for at least two separate electrical generators (3) of an aircraft (5), the electrical distribution system (1) comprising: at least two supply branches (7), a connection node (9), the connection node (9) also having a connection (11) for connecting electrically consuming devices (13), at least two disconnecting devices (15), each disconnecting device (15) comprising a contactor (17) provided in a corresponding supply branch (7), a measuring system (19) for measuring a physical quantity, and a decision element (21) configured to switch the contactor (17) from a conducting configuration to a non-conducting configuration when said measurement of the physical quantity satisfies a condition representative of an electrical energy-consuming state of the corresponding electrical generator (3). Figure 1
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