Patent ID: 7550873
Filing Date: 2009-06-23
Classification: H02J,H04L

Abstract:
1. An uninterruptible power supply (UPS) for home/office networking and communication system, comprising: a. a first input for receiving the phase wire of an AC power supply, b. a second input for receiving the neutral wire of the AC power supply, c. an AC-DC converter adapted for converting the AC power supply connectable to the first input and second input from AC to DC to provide a first DC voltage V d. a battery charger, wherein the battery charger comprises e. a rechargeable battery array adapted for receiving a first DC voltage V f. a control circuit, wherein the control circuit comprises: g. a plurality of DC-DC voltage converters/voltage controllers {VCi}, i=1, 2, . . . , N corresponding to the plurality of loads Li, each of the plurality of DC-DC voltage converters/voltage controllers VCi comprising: h. a plurality of output DC power terminals for a plurality of loads Li, {i}=1, 2, . . . N, N being a positive integer, wherein each of the plurality of the output DC power terminals having a first positive output terminal LiP for providing a positive DC voltage and a second output terminal LiG for providing a ground terminal, and each of the output DC power terminals is capable of providing a corresponding output DC voltage; wherein, in operation, when the AC power supply is available, the UPS provides a plurality of DC voltage outputs to the plurality of loads L i , through the AC-DC converter, the control circuit, and the plurality of the DC-DC voltage converters/voltage controllers, and provides continuous DC charge to the rechargeable battery array, and when the AC power supply becomes unavailable, or the first DC voltage to the control circuit is lower than a predetermined voltage level, the control circuit detects the unavailability of the AC power supply, or the decrease of the first DC voltage V DC1 , and switches the source of DC voltage from the first DC voltage to the DC supply voltage V B of the rechargeable battery array and provides continuous and constant DC voltage output to the plurality of loads L i through rechargeable battery array, the control circuit, and the plurality of the DC-DC voltage converters/voltage controllers.