Uninterruptible power supply provider

A technology of power supply and power control circuit, which is applied in current collectors, battery circuit devices, electric vehicles, etc. It can solve the problems of power consumption, failure of silicon-controlled rectifier cut-off, and reduced efficiency of uninterruptible power supply, so as to prevent startup The effect of excessive current
CN101752880AActive Publication Date: 2010-06-23DELTA ELECTRONICS INC
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
DELTA ELECTRONICS INC
Publication Date
2010-06-23

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Abstract

The invention relates to an uninterruptible power supply provider, which comprises an input switch circuit, an AC-DC conversion circuit, a bus capacitor, an energy storage unit, a charging circuit, a DC-AC conversion circuit and a system control circuit, wherein the AC-DC conversion circuit is connected between the input switch circuit and a direct current bus, the bus capacitor is connected with the direct current bus, the energy storage unit is selectively connected with a connecting end and a common connecting end of the energy storage unit, the charging circuit is connected with the input switch circuit and the connecting end of the energy storage unit, the DC-AC conversion circuit is connected with the connecting end of the energy storage unit and the direct current bus, and the system control circuit is connected with the input switch circuit, the AC-DC conversion circuit, the charging circuit and the DC-AC conversion circuit to be used for controlling operation and controls the AC-DC conversion circuit to stop operation when the uninterruptible power provider starts so as to enable the DC-AC conversion circuit to charge the bus capacitor. According to the invention, the condition that impact currents exist in the uninterruptible power provider because of overlarge start currents of the uninterruptible power provider can be prevented from occurring.
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Description

technical field

[0001] The present invention relates to a power supply, in particular to an Uninterruptible Power Supply (UPS). Background technique

[0002] With the rapid development of information industry and high-tech industry, most precision electronic instruments and equipment need to rely on high-quality power supply to maintain normal operation. Among various power supply methods, the UPS can not only ensure that the power will not be interrupted, but also provide high-quality power, so the UPS has become the best solution for providing high-quality power today.

[0003] A traditional uninterruptible power supply includes an AC-DC conversion circuit, a DC-AC conversion circuit, and a bus capacitor, wherein the output end of the AC-DC conversion circuit is connected to the bus capacitor and the input end of the DC-AC conversion circuit to convert the AC The input voltage is converted to a DC voltage and a bus voltage is generated on the DC bus, and the bus capacitor...

Claims

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