Electric power supply system, in particular in an aircraft

H - Electricity – 02 – J

Patent

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Details

H02J 1/10 (2006.01) H02J 7/34 (2006.01)

Patent

CA 2739653

A fail-safe electrical power supply system (11), in particular in an aircraft, does not require any hardware, control-engineering or wiring complexity for an emergency power supply, which need be started up only when required, if, on the output side, the normal supply has parallel-connected supply modules (13) such as rechargeable batteries or, in particular, fuel cells, which are each loaded as far as possible at the optimum operating point or efficiency, but in any case below their maximum load capacity. If there are a sufficient number of modules (13), on the basis of this power difference, the spare power and energy which are kept available are sufficient to continuously satisfy the power demand of the connected loads, provided that only at least one module (13) remains serviceable. A module (13) which has not failed is then admittedly operated at lower efficiency but still in the permissible low range, ensuring that the operating supply to the loads is maintained without interruption.

L'invention concerne un système de distribution d'énergie électrique (11) à sûreté intégrée, en particulier à bord d'un aéronef, qui peut se passer du coût d'appareils, de dispositifs de commande et de câblage d'une alimentation électrique de secours mise en route en fonction des besoins si l'alimentation normale comprend des modules d'alimentation (13) montés en parallèle sur la sortie tels que des accumulateurs ou en particulier des piles à combustible, chacun étant sollicité avec un point de travail ou un niveau de rendement optimal, en tout cas en dessous de la limite maximale de sollicitation. Si l'on dispose d'un nombre suffisant de modules (13) fonctionnant avec cette différence de puissance, la réserve de puissance ou d'énergie ainsi tenue en réserve suffit pour satisfaire toujours les besoins de puissance des consommateurs raccordés à la condition qu'au moins un module (13) reste fonctionnel. Un module (13) non défaillant fonctionne certes dans ce cas avec un niveau de rendement moins favorable, mais en restant dans le domaine fiable de charge, tandis que les consommateurs bénéficient d'une alimentation sans interruption.

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