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Uninterruptible power supply (UPS) based on adjustable speed drive (ASD)

A speed-regulating drive device and power supply technology, which is applied to circuit devices, emergency power supply arrangements, electrical components, etc., to achieve low maintenance costs, increase system reliability, and avoid the effects of large currents

Inactive Publication Date: 2014-03-26
NANJING HIGH DRIVE ELECTROMECHANICAL AUTOMATION EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Because there are certain problems in the traditional UPS, power UPS and traditional ASD solutions, the technical solution of the present invention is to solve various problems in the prior art by adding a backup power supply in the ASD device to form an uninterruptible power supply to drive the motor. kind of problem

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  • Uninterruptible power supply (UPS) based on adjustable speed drive (ASD)
  • Uninterruptible power supply (UPS) based on adjustable speed drive (ASD)
  • Uninterruptible power supply (UPS) based on adjustable speed drive (ASD)

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0032] figure 1 is a functional block diagram of an ASD-based uninterruptible power supply 100 according to an embodiment of the present invention. The uninterruptible power supply 100 is located between a three-phase power supply system and an AC load (for example, an AC motor 200 ), and provides AC power for the three-phase AC load.

[0033] Such as figure 1 As shown, the ASD-based uninterruptible power supply 100 accor...

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Abstract

The invention provides an uninterruptible power supply (UPS) based on an adjustable speed drive (ASD). The UPS comprises a three-phase rectification circuit, a pulse width modulation inversion circuit and a back-up power supply device, wherein the three-phase rectification circuit is provided with an input port and an output port, receives input three-phase power from the input port, converts the input three-phase power into direct current and outputs the direct current through the output port; the pulse width modulation inversion circuit is connected to the output port of the three-phase rectification circuit and converts the direct current output from the output port into alternating current; the back-up power supply device is connected between the input port of the three-phase rectification circuit and the output port of the three-phase rectification circuit, is in parallel connection with the three-phase rectification circuit and is used for receiving the input three-phase power, storing the power and outputting direct current to the pulse width modulation inversion circuit. The UPS based on the ASD has the advantages that the power supply voltage sag coping capacity of an electric motor can be enhanced, and the influence on equipment caused by short-time voltage interruption can be overcome.

Description

technical field [0001] This invention relates to uninterruptible power supplies, and more particularly to uninterruptible power supplies based on adjustable speed drives. Background technique [0002] In recent years, the power supply quality of factories, enterprises and commercial buildings has attracted increasing attention and attention, because industrial process equipment is particularly sensitive to voltage sags, especially in petrochemical, chemical fiber, steel, pharmaceutical and other industries that require continuous operation. Most of these industries currently use frequency converters to control drive equipment, and frequency converters are very sensitive to power supply voltage fluctuations. Even frequency converters that have taken many protective measures have poor ability to resist voltage fluctuations, and can hardly tolerate power supply interruptions. Therefore, common short-term voltage dips or interruptions in power supply systems will cause equipment...

Claims

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Application Information

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IPC IPC(8): H02J9/06H02P27/08
Inventor 刘玮黄晓辉王中李志国辛志远
Owner NANJING HIGH DRIVE ELECTROMECHANICAL AUTOMATION EQUIP CO LTD
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