Vehicle power supply for a bus coupler without a transformer

H - Electricity – 04 – B

Patent

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Details

H04B 3/54 (2006.01) H04B 3/56 (2006.01)

Patent

CA 2194887

A device for supplying the on-board system voltage in a bus coupler without a repeater, for coupling to an information and power carrying bus of a bus system, in particular for building a systems management. The device includes a coupling circuit having a control input connected to a triggering circuit having inputs for a control criterion. The coupling circuit operates as a constant current source at communications frequencies and as a control circuit together with a triggering circuit at lower frequencies, such as those caused by power consumption. The coupling circuit is effectively connected in series with a reservoir capacitor for tapping the on-board system voltage. The series connection is effectively connected to the bus drivers

L'invention concerne un dispositif de mise à disposition de la tension de réseau de bord d'un coupleur de bus sans relais, pour couplage à un bus (circuit d'attaque de bus 1, 2) véhiculant des informations et de l'énergie d'un système de bus, utilisé notamment en gestion d'immeubles. Un circuit de couplage (3) est connecté par son entrée de commande (4) à un circuit de déclenchement (5) qui comporte des entrées (6, 7) pour un critère de régulation. Le circuit de couplage (3) est dimensionné et se présente de manière à fonctionner comme une source de courant constant pour les fréquences de communication et, pour des fréquences plus basses, comme celles induites par la consommation d'énergie, comme circuit de régulation, en relation avec le circuit de déclenchement (5). Le circuit de couplage (3) est connecté en série avec un condensateur de mémorisation (8), en fonction de l'effet, pour prélever la tension de réseau de bord. Le circuit série est connecté, selon l'effet, aux circuits d'attaque de bus (1, 2).

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