Power line communication system

H - Electricity – 04 – B

Patent

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Details

H04B 3/54 (2006.01)

Patent

CA 2611576

A system for independent control of electric motors and electric lights includes a plurality of two-wire wallstations coupled in series via power wires between an alternating-current (AC) source and a light/motor control unit. The light/motor control units is preferably located in the same enclosure as an electric motor5 and an electric light and has two outputs for independent control of the motor and the light. The light/motor unit and the wallstations each include a controller and a communication circuit that is coupled tot he power wiring via a communication transformer and communication with each other using a loop current carrier technique. The light/motor control unit and the wallstation utilize pseudo random orthogonal codes and a median filter in the communication process.

Selon cette invention, un système de commande indépendante de moteurs électriques et d'éclairages électriques comporte plusieurs postes muraux à deux fils couplés en série via des fils électriques entre une source de courant alternatif et un module de commande d'éclairage/de moteur. Ce module est, de préférence, situé dans la même enceinte qu'un moteur électrique et qu'un éclairage électrique et il présente deux sorties pour la commande indépendante du moteur et de l'éclairage. Le module de commande de l'éclairage/du moteur et les postes muraux comportent, respectivement, un contrôleur et un circuit de communication couplé au câblage électrique via un transformateur de communication et communiquent entre eux au moyen d'une technique de porteur de charge en boucle. Ledit module et les postes muraux utilisent de codes orthogonaux pseudo-aléatoires et un filtre médian dans le processus de communication.

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