UPS system sharing battery pack and control method thereof

Abstract

The invention belongs to the technical field of electronic circuits and provides a UPS system sharing a battery pack and a control method thereof. The UPS system comprises a battery pack and at leasttwo UPS hosts connected to the battery pack, wherein the first input end of each UPS host is connected to the positive pole of the battery pack; the second input end of each UPS host is connected to the negative pole of the battery pack; a current signal output by the battery pack supplies power to each UPS host, and is successively rectified by a rectifier module and inverted by an inverter module; a control module is configured to control each UPS host to achieve the synchronization of the rectifier module and the synchronization of the inverter module according to a synchronization signal fed back by a combining module in order that respective UPS hosts output consistent voltage, frequency and phase. Thus, multiple UPS host can share the battery packs when combined, which reduces systemcost. In addition, because respective UPS hosts output consistent voltage, frequency and phase, combining faults are reduced. The control method is simple and easy, and high in efficiency.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a UPS system sharing battery packs and a control method thereof. Background technique [0002] At present, UPS (Uninterruptible Power System / Uninterruptible Power Supply, uninterruptible power supply) with single-phase input and output and single battery pack as backup discharge function introduced by major power supply manufacturers cannot share the battery pack when paralleling. Therefore, each UPS host must be equipped with a separate set of battery packs. In parallel mode, only by controlling the UPS output voltage and phase consistency can there be no parallel faults. At the user end, customers need to purchase multiple sets of battery packs. Relatively poor in economy and ease of use. [0003] Therefore, in the existing UPS system, when multiple UPS hosts are paralleled, they cannot share the battery pack, and multiple sets of battery packs are requ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a UPS system for sharing battery packs and its control method, aiming to solve the problem that existing UPS systems cannot share battery packs when multiple UPS mainframes are paralleled, and multiple sets of battery packs need to be used to pair Each UPS host is powered independently, resulting in increased costs and complex control issues

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