A buck-boost dual-isolation Ethernet bidirectional power supply system and power supply method

Abstract

The invention discloses a boost and buck double-isolation Ethernet bidirectional power sourcing system and a power sourcing method. The boost and buck double-isolation Ethernet bidirectional power sourcing system comprises at least two port devices which are connected mutually. Each port device comprises a power input port which is connected with an external power source, a mainboard which is connected with the power input port, a PSE (Power Sourcing Equipment) and a PD (power device) which are connected with the mainboard, an RJ45 module which is connected with the PSE and the PD, a boost isolation module which is connected between the mainboard and the PES, a buck isolation module and a current unidirectional control module which are connected between the mainboard and the PD in series, and an automatic control module connected with the PD. The boost isolation module is also connected with the power input port. According to the system and the method, bidirectional power sourcing can be realized, and the relatively high reliability and security are achieved.

Description

technical field [0001] The invention relates to the technical field of remote Ethernet power supply, in particular to a buck-boost double-isolated Ethernet bidirectional power supply system and a power supply method. Background technique [0002] In recent years, there has been a network cable as the medium, through the POE (POE, Power Over Ethernet) power supply system for some IP-based terminals IPAP, network cameras, Internet phones, PDAs and other equipment while transmitting data signals, There is also technology to provide DC power for such devices. The use of POE power delivery systems eliminates the need to install wall power connections for end devices, thus greatly reducing the applied costs associated with supporting end devices. This new technology is very suitable for wireless city, security monitoring and other industries, and will become a trend in the future. [0003] Although the existing POE power supply technology eliminates the need for terminal AC powe...

AI Technical Summary

Problems solved by technology

Such as some high-definition video extenders, etc., only the receiving end powered by POE can supply power to the sending terminal, but the sending terminal cannot supply power to the receiving end, which increases the limitations of POE technology in the application process of this device.

[0004] At present, there have been Ethernet power supply systems that can realize bidirectional power supply, such as the invention patent with the publication number CN104793544A, which discloses a bidirectional power supply system in Ethernet POE, including: sending end equipment and receiving end equipment, sending end equipment and The receiving end equipment is equipped with a main board, PD module, PSE module and network port terminal. The PSE module and PD module in each equipment are connected through relays. Although this power supply system can realize two-way power supply, the reliability and safety of the system are poor.

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