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Circuit protection method and device, electrical equipment and storage medium

A technology for circuit protection and electrical equipment, applied in the field of circuit protection, can solve problems affecting user experience, poor temperature control comfort, etc., to achieve the effect of improving user experience and reducing grid instability

Pending Publication Date: 2022-04-15
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the PFC circuit protection measures in the related art can protect the device from damage, the shutdown of temperature control equipment such as air conditioners and refrigerators during use will cause poor temperature control comfort and affect user experience.

Method used

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  • Circuit protection method and device, electrical equipment and storage medium
  • Circuit protection method and device, electrical equipment and storage medium
  • Circuit protection method and device, electrical equipment and storage medium

Examples

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Embodiment Construction

[0038] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0039] Circuit protection measures in the related art generally include the following two processing methods:

[0040] First, voltage mutation protection: monitor the input voltage of the PFC circuit in real time. When the input voltage is detected to meet the set voltage mutation conditions, it will trigger the shutdown of the power switch in the PFC circuit and control the shutdown of electric...

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Abstract

The invention relates to a circuit protection method and device, electrical equipment and a storage medium. The method comprises the steps that the adjustment range of the duty ratio of a switching tube in a PFC circuit in the current carrier period is determined; and adjusting the duty ratio of the current carrier cycle in the adjustment range so as to adjust the current of the PFC circuit to be in a preset range. According to the method disclosed by the invention, the adjustment of the duty ratio of the switching tube is always within the set adjustment range, and the increase amplitude of the duty ratio does not exceed the adjustment range in the scene of voltage abrupt change, so that the current of the PFC circuit is always under the overcurrent threshold, and the electrical equipment can stably operate without shutdown on the premise of protecting the electrical equipment. Therefore, abnormal shutdown of the electrical equipment caused by instability of a power grid is effectively reduced, and the user experience is improved.

Description

technical field [0001] The present disclosure relates to the field of circuit protection, in particular to a circuit protection method, device, electrical equipment and storage medium. Background technique [0002] Due to the influence of factors such as transmission lines and power loads, sudden changes in voltage may occur in the power grid. When the power grid has a sudden voltage change or is disturbed by harmonics, the electrical equipment will not work normally, and the electrical equipment will be damaged in severe cases. In such scenarios, a power factor correction (Power Factor Correction, PFC) circuit is of great significance. [0003] PFC circuits are often used in electrical equipment such as air conditioners, refrigerators, and washing machines. They have the advantages of high power factor, small harmonic current, and stable output voltage. They can be used to improve the total harmonic distortion (THD) or power factor of power supply products or electrical eq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/14H02M1/42H02M1/44H02M1/32
CPCH02M1/14H02M1/4208H02M1/44H02M1/32Y02B70/10
Inventor 单联瑜
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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