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Power failure detection method and device and electric equipment with power failure detection device

A technology for power failure detection and discharge voltage, which is used in measurement devices, power supply testing, and current/voltage measurement. It can solve problems such as low efficiency and inaccurate power failure judgment, and achieve the effect of improving accuracy and maintaining detection efficiency

Pending Publication Date: 2022-05-27
QINGDAO HAIER REFRIGERATOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a power-down detection method, which can solve the technical problems of inaccurate power-down judgment and low efficiency in the existing power-down detection method

Method used

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  • Power failure detection method and device and electric equipment with power failure detection device
  • Power failure detection method and device and electric equipment with power failure detection device
  • Power failure detection method and device and electric equipment with power failure detection device

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Embodiment Construction

[0034]The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the protection scope of the present invention.

[0035] It should be noted that the term "comprising" or any other variation thereof is intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also not expressly listed Other elements, or elements that are inherent to such a process, method, article or apparatus. Furthermore, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

[0036] In an embodiment of the present invention, an electrical appliance is...

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Abstract

The invention discloses a power failure detection method for a circuit system, which comprises the following steps of: respectively acquiring sampling voltages of the circuit system at a first time point and a second time point, comparing the sampling voltages with a set discharge voltage of an energy storage circuit in the circuit system, and calculating a sampling voltage change rate between the two time points when a condition is met, and comparing the obtained sampling voltage change rate with the set discharge voltage change rate of the energy storage circuit in the circuit system, and outputting a power-down signal when the condition is met. According to the power failure detection method, whether the possibility of power failure exists or not is preliminarily judged through two times of voltage sampling, then the voltage change rate condition between the two times of voltage sampling is calculated and compared with the preset voltage change rate, and the accuracy degree of the detection result is improved while the detection efficiency is kept.

Description

technical field [0001] The present invention relates to the technical field of power electronics, and in particular, to a method and device for detecting a power failure and an electrical device having the same. Background technique [0002] In the equipment that uses AC power for power supply, when the input power supply is powered off, it is necessary to set up a power failure detection device to detect the input voltage of the equipment, and determine the power supply of the equipment, so that when abnormal conditions such as power failure occur, the equipment can Need to power off or other operations, further, by sending the power off signal to the workbench, so that the staff know the power failure of the equipment and make adjustments in time, so as not to affect the normal production operation. [0003] However, the power failure detection device provided in the prior art mostly adopts the implementation of sampling the voltage of the power supply of the equipment at ...

Claims

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Application Information

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IPC IPC(8): G01R31/40G01R19/00G01R19/10
CPCG01R31/40G01R19/0084G01R19/10G01R19/00
Inventor 许艳青
Owner QINGDAO HAIER REFRIGERATOR CO LTD
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