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Power supply switching circuit

A power supply switching and circuit technology, which is applied in circuit devices, DC circuits above three wires, DC network circuit devices, etc., can solve the problems of low reliability of power supply devices and current crosstalk, and achieve the purpose and advantages. , the effect of improving reliability

Active Publication Date: 2022-07-01
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] An embodiment of the present application provides a power supply switching circuit to at least solve the problem of low reliability of the power supply device caused by current crosstalk when the power supply device centrally supplies power to multiple powered devices in the related art

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Embodiment Construction

[0026]In order to make the purposes, technical solutions, and advantages of the embodiments of the present application more clearly understood, the embodiments of the present application will be described and illustrated below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the examples provided by the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the embodiments of the present application.

[0027] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present app...

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Abstract

The present application relates to a power supply switching circuit. The system includes a first power supply module, a second power supply module, an energy storage module, a switch module, a first drive module, a first blocking module, a second blocking module, and a third blocking module. module, a second drive module and an output module; the first drive module is used for monitoring the energy storage state of the energy storage module, and when the energy storage state of the energy storage module is full, the switch module is controlled to turn on; the second drive module, It is connected to the first driving module and is used for monitoring the power supply voltage of the second power supply module, and controlling the switch module to turn off when the power supply voltage of the second power supply module is greater than the first threshold. The present application solves the problem of low reliability of the power supply device caused by current crosstalk when the power supply device in the related art provides centralized power supply to multiple power receiving devices, and realizes the elimination of centralized power supply by the power supply device to multiple power receiving devices. Therefore, the technical effect of improving the reliability of the power supply device is achieved.

Description

technical field [0001] The embodiments of the present application relate to the technical field of power over Ethernet, and in particular, to a power supply switching circuit. Background technique [0002] Power Over Ethernet (POE for short), also known as POE power supply, is a technology that can transmit power and data to devices through twisted pairs in Ethernet. [0003] POE power supply can supply power to Internet phones, wireless base stations, cameras, hubs, computers and other equipment. Since the electronic equipment that can be powered by Ethernet can be used without additional power sockets, it can save the time to configure the power cord at the same time. Compared with the cost, the cost of the entire equipment system is relatively reduced. Therefore, POE power supply technology is widely used in video surveillance, video transmission and other technical fields. [0004] At present, in the 48V power supply of ONU (Optical Network Unit, ONU) equipment in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/10H02J1/08H02J13/00
CPCH04L12/10H02J1/084H02J13/00002H02J13/00036
Inventor 吴维豪李伟张坤方勇军徐威
Owner ZHEJIANG DAHUA TECH CO LTD