Reduction of inrush current due to voltage sags

Details Reduction of inrush current due to voltage sags Reduction of inrush current due to voltage sags

H - Electricity

02

H

H02H 7/00 (2006.01)

Patent

CA 2627313

Various systems and methods are provided for minimizing an inrush current to a load after a voltage sag in a power voltage. In one embodiment, a method is provided comprising the steps of applying a power voltage (100) to a load (246), and detecting a sag in the power voltage (106) during steady-state operation of the load. The method includes the steps of adding an impedance (RT) to the load upon detection of the sag in the power voltage, and removing the impedance when the power voltage has reached a predetermined poin in the power voltage cycle after the voltage has returned to normal.

Cette invention concerne divers systèmes et procédés visant à réduire au minimum un courant d'appel sur une charge après une baisse soudaine de tension dans une tension. Dans un mode de réalisation, un procédé consiste à appliquer une tension à une charge puis à détecter une baisse soudaine de la tension pendant un fonctionnement stationnaire de la charge. Le procédé consiste à ajouter une impédance à la charge lors de la détection de la baisse soudaine de la tension puis à retirer l'impédance de la charge lorsque la tension a atteint un point prédéfini dans le cycle de tension après le retour de la tension à une tension nominale.

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