Power supply for a load control device

H - Electricity – 02 – J

Patent

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Details

H02J 13/00 (2006.01) H02M 7/00 (2006.01)

Patent

CA 2620958

.A power supply for a load control device is disposed in series with an AC voltage source and a load and generates a substantially DC voltage for powering a controller of the load control device. The power supply is operable to provide substantially all voltage provided by the AC voltage source to the load and includes a controllably conductive device, a triggering device, and a charging circuit. The charging circuit is operable to charge an energy storage device and to conduct current to the load when the controllably conductive device is non-conductive. The controllably conductive device begins conducting the full load current when the energy storage device has charged to a predetermined amount of energy. Before the controllably conductive device begins to conduct, only a minimal voltage, which is substantially the same as the break-over voltage of the triggering circuit, develops across the power supply to allow the energy storage device to charge.

Alimentation de dispositif de contrôle de charge en série avec une source de tension C.A. et une charge produisant une tension sensiblement C.C. pour l'alimentation d'un contrôleur du dispositif. Cette alimentation peut fournir sensiblement toute tension à partir de la source mentionnée à destination de la charge, et elle est équipée d'un dispositif conducteur contrôlable, d'un dispositif de déclenchement et d'un circuit de charge, lequel charge un dispositif de stockage d'énergie et conduit le courant à la charge lorsque le dispositif conducteur contrôlable est en mode non conducteur, et d'ailleurs ce dispositif commence à conduire le courant de pleine charge lorsque le dispositif de stockage d'énergie a accumulé une charge correspondant à une quantité d'énergie préétablie. Avant que le dispositif conducteur contrôlable ne commence à conduire, seule une tension minimum sensiblement égale à la tension de rupture du circuit de déclenchement s'établit dans l'alimentation pour permettre la charge du dispositif de stockage d'énergie.

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