Reverse power over Ethernet system and method, and load sharing device and powered device

Abstract

The invention discloses a reverse power over Ethernet (POE) system and method, and a load sharing device and a powered device and relates to the field of POE. The reverse POE system includes the powered device and a plurality of power supplying devices. Each power supplying device is connected with the powered device. The powered device includes the load sharing device. The load sharing device includes a plurality of controllable impedors, a control device and a DC-to-DC converter. A power signal of each power supplying device is output to the DC-to-DC converter through an adjustable impedor. The control device carries out sampling on voltages output by the adjustable impedors. If a condition that the output voltages of the adjustable impedors are imbalanced happens, feedback signals are output to the adjustable impedors so as to readjust impedances to enable the output voltages of the adjustable impedors to be balanced. The DC-to-DC converter carries out DC conversion on balance voltages output by the adjustable impedors so as to provide the voltage to the powered device and thus power supplying load sharing is realized and switching back and forth of power supplying ports is prevented and system stability is improved.

Description

technical field [0001] The present invention relates to the field of Power Over Ethernet (POE for short), in particular to a reverse Ethernet power supply system and method, a load sharing device and a power receiving device. Background technique [0002] During the construction of FTTx (optical fiber access) network, some communities or buildings have power supply difficulties. Using reverse power over Ethernet technology can effectively solve the problem of power supply difficulties and promote the smooth progress of FTTx network construction. [0003] Ethernet technology refers to the technology that uses the existing Ethernet five-category (Cat.5) wiring to provide DC power supply while transmitting data signals. Reverse Power over Ethernet technology utilizes the Power Sourcing Equipment (PSE) in the user's home to reversely supply power to the network equipment through the five-category line, so as to solve the power supply problem of the network equipment when the con...

AI Technical Summary

Problems solved by technology

Due to the difference in the length of the five types of cables, the line resistance is different, resulting in different arrival voltages at ports U1 and U2.

According to the conduction characteristics of the diode, the high-voltage line supplies power to the system, and other lines do not bear the power of the system. There are two problems in this way: on the one hand, it is not fair for high-voltage users to supply power alone; on the other hand, high-voltage users After the line is connected, the online high-voltage user power supply is automatically reselected, causing the system power supply to switch back and forth between different lines, which may easily cause system instability or failure

[0005] In addition, in the above system, as long as a user supplies power to the equipment normally, whether other line users are online or not, the line is always in the normal power supply state, and the power consumption

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