Uninterruptible power supply module

Abstract

An uninterruptible power supply module, which includes a DC voltage source, a control module, a control arm bridge module, an inductance element, a switch element and a switch element. The switching element is turned on before the switching element connects the inductance element to the DC voltage source, so that the DC voltage provided by the DC voltage source is regulated by the control arm bridge module, and then provided to the load as the output AC voltage, and is switched The element makes the inductance element turn off after being connected to the DC voltage source, that is, it is not conducted, so as to improve the service life of the switching element and the reliability of the uninterruptible power supply module.

Description

technical field [0001] The invention relates to an uninterruptible power supply module; in particular, it relates to an uninterruptible power supply module with an auxiliary switching element. Background technique [0002] With the advancement of power supply technology, the uninterruptible power supply module (uninterruptible power supply) has become an indispensable part of the power supply system. Its main feature is that it can be powered by a main power supply (usually an AC voltage source) Normally, the uninterruptible power supply module receives an AC voltage provided by the main power supply, and outputs an AC voltage after being regulated by a control arm bridge module as a voltage provided to a load, but when the main power supply fails Or when the power supply exceeds the predetermined voltage abnormally, the uninterruptible power supply module switches the line to its own DC voltage source (such as a battery) through its own switching element, so as to adjust a ...

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Problems solved by technology

[0004] However, the switching elements of the above-mentioned uninterruptible power supply modules are all millisecond mechanical switching elements, which require a long switching time. The small capacitor mentioned in No. 6104104 cannot provide enough energy for the load during the switching process. Therefore, during the switching process, the output voltage will inevitably be temporarily interrupted, which has greatly affected the reliable operation of the load. In addition, in the process of using mechanical switching elements to achieve switching, a large current may cause switching failure, and even form an arc at the contact point, burning out the switching elements of the uninterruptible power supply module

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