Adjustable uninterruptible power supply protection

H - Electricity – 02 – J

Patent

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Details

H02J 9/06 (2006.01)

Patent

CA 2761977

An uninterruptable power supply (UPS) designed to switch power inputs between an alternating current mode and a battery mode by adjusting the amplitude and/or frequency windows of the input voltage so that the uninterruptible power supply accepts the unstable voltage and/ or frequency. This prevents the uninterruptible power supply to switch back to the battery mode during a transfer time between the battery mode and the AC mode. The uninterruptable power supply includes a control circuit. The control circuit modifies the monitored value and/or actual amplitude and/or the frequency window when unstable amplitude and/or an unstable frequency are detected at the input terminal of the input voltage.

L'invention porte sur une alimentation électrique sans coupure (UPS) conçue pour commuter des entrées d'alimentation entre un mode courant alternatif et un mode batterie par ajustement des fenêtres d'amplitude et/ou de fréquence de la tension d'entrée de telle manière que l'alimentation électrique sans coupure accepte une tension et/ou une fréquence instables. Cela évite que l'alimentation électrique sans coupure ne commute de nouveau vers le mode batterie durant une période de transfert entre le mode batterie et le mode courant alternatif. L'alimentation électrique sans coupure comprend un circuit de commande. Le circuit de commande modifie la valeur surveillée et/ou la fenêtre d'amplitude et/ou de fréquence réelle lorsqu'une amplitude instable et/ou une fréquence instable sont détectées au niveau de la borne d'entrée de la tension d'entrée.

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