UPS control method

A control method and DC conversion module technology, applied in the direction of control/regulation systems, instruments, and adjustment of electrical variables, etc., can solve problems such as phase difference and seamless switching cannot be guaranteed

Active Publication Date: 2020-12-04
ZHANGZHOU KEHUA TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a UPS control method to solve the problem in the prior art that there is a phase difference in the output when switching between the bypass mode and the inverter mode, and seamless switching cannot be guaranteed.

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Embodiment Construction

[0025] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0026] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0027] refer to figure 1 , the embodiment of the present invention provides a UPS control method, the UPS includes: a DC conversion module 11, an inverter module 13 and a bypass 141, and the UPS control method includes:

[0028] Step S101: Obtain the working status of...

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Abstract

The invention is applicable to the technical field of power supplies, and provides a UPS control method, which comprises the following steps: acquiring the working state of a bypass; when the workingstate of the bypass is normal, collecting the instantaneous value of the input voltage of the bypass in real time, and determining a first zero crossing point and a second zero crossing point according to the instantaneous value of the input voltage of the bypass; at a first zero-crossing point moment, switching a direct-current conversion module into a positive half-cycle energy supply state, andswitching an inversion module into a positive half-cycle energy supply state; and and at a second zero-crossing point moment, switching the direct-current conversion module into a negative half-cycleenergy supply state, and switching the inversion module into a negative half-cycle energy supply state. According to the invention, when the bypass is normal, the zero crossing point is pre-judged according to the bypass input voltage, and the direct-current conversion module and the inversion module are switched to the positive half-cycle energy supply state or the negative half-cycle energy supply state at the same time at the two zero crossing points of one period, so that the output phases of the UPS are consistent when the bypass and the main loop supply power, and seamless switching between the bypass mode and the inversion mode is ensured.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a UPS control method. Background technique [0002] Uninterruptible Power System (UPS) refers to a device that can continue to supply power to the load to ensure the normal power supply of the load when the AC input power supply is abnormal or cut off. Because of its excellent performance and convenient maintenance function, it has been widely used in various fields. [0003] According to the operating conditions, the UPS will switch between the bypass mode and the inverter mode, but because the output phases of the main circuit power supply and the bypass power supply may be inconsistent, there will be a phase difference when switching between the bypass mode and the inverter mode, Seamless switching cannot be guaranteed. Contents of the invention [0004] In view of this, an embodiment of the present invention provides a UPS control method to solve the pr...

Claims

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Application Information

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IPC IPC(8): H02M7/155H02M3/155H02J9/06
CPCH02J9/062H02M3/155H02M7/155
Inventor 石学雷许勇枝游德河
Owner ZHANGZHOU KEHUA TECH CO LTD
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