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Circuits for regulating the dc component of the output voltage of an uninterruptible power supply

A technology of output voltage and measurement circuit, which is applied in the direction of converting irreversible DC power input into AC power output, output power conversion device, circuit device, etc., and can solve the problem that the accuracy and dynamic range of the voltage measurement circuit are not enough to control accurately DC components and other issues, to achieve the effect of high precision

Active Publication Date: 2021-04-06
SOCOMEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, the accuracy and dynamic range of voltage measurement circuits are not sufficient to control the DC component accurately enough

Method used

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  • Circuits for regulating the dc component of the output voltage of an uninterruptible power supply
  • Circuits for regulating the dc component of the output voltage of an uninterruptible power supply
  • Circuits for regulating the dc component of the output voltage of an uninterruptible power supply

Examples

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Embodiment Construction

[0078] figure 2 It is a schematic diagram of the uninterruptible power supply device 100 in the embodiment of the present invention.

[0079] The power supply device 100 includes three first connection terminals 2 for connecting to a three-phase power supply network and three second connection terminals 3 for connecting a load. In this example, the three terminals are three phases of a three-phase circuit, and the neutral point is not shown for the sake of clarity of the drawing.

[0080] The power supply device 100 also includes a plurality of uninterruptible power supply units 1, each uninterruptible power supply unit 1 including a rectifier coupled to the first connection terminal 2, an inverter coupled to the second connection terminal 3, and a rectifier and an inverter coupled to the A DC voltage source (eg a battery) between the devices. considering figure 2 For clarity, only one uninterruptible power supply unit 1 is shown in the figure.

[0081] For each power su...

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Abstract

A control circuit (6) for controlling the output voltage (V) of an uninterruptible power supply unit (1), comprising: - for sending a voltage setpoint (V ref ) module (7); - a measurement module (8); - a module (9) for regulating said voltage (V), said module being configured to determine a setpoint (Co ), the measurement module (8) comprises: - a first circuit block (81), which is configured to measure the current at the output of the power supply unit (1); - a second circuit block (82), which is configured to measure the The AC component of the above voltage (V) (V AC ); and - a third circuit block (83) configured to measure the DC component (V DC ). The third measurement circuit block (83) includes: a low-pass filter (84) configured not to change the DC component (V DC ) so that the AC component of the voltage (V) (V AC ) attenuation; and for measuring the DC component (V DC ) means (85) comprising an amplifier circuit block configured to measure the DC component (V DC ) before amplifying the filtered signal delivered by said filter (84).

Description

technical field [0001] The present invention relates to an uninterruptible power supply, and more particularly, to a circuit for regulating the direct current (DC) component of the voltage of the uninterruptible power supply. Background technique [0002] An uninterruptible power supply (UPS) is an electronic power device that is capable of supplying a load with a stable alternating current (AC) voltage without any interruptions or micro-interruptions, no matter what happens on the power network. [0003] UPSs are often used to power buildings such as data centers (eg, data hosting centers or industrial sites). [0004] The term "inverter" is often misused to refer to the entire installation. This applies, for example, to "inverters" arranged between the power supply network and the servers in a computer center. [0005] A UPS consists of a converter that converts AC voltage to DC voltage (called a "rectifier"), an energy storage device (such as a battery or supercapacitor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48H02M1/40H02J9/06
CPCH02J9/062H02M1/40H02M7/48H02M7/4803
Inventor S·梅西耶P·米勒A·绍瓦
Owner SOCOMEC