POE power source receiving method and POE power source receiving device

Abstract

The invention provides a POE power source receiving method and a POE power source receiving device. The method comprises the steps that a power source is connected from n network ports of a POE power supply device respectively through n PD interface circuits, wherein n >=2; the working state information of the PD interface circuits is detected, and the AND operation is carried out according to the working state information to obtain an enable signal controlling electricity supplying; according to the enable signal, the working state of the multi-phase switch power source is controlled due to the fact that the multi-phase switch power source is connected with the output power sources of the PD interface circuits, wherein the multi-phase switch power source is provided with at least n power source input ends which are mutually independent, and the output voltage of the multi-phase switch power source is adjusted and output to a system device. According to the technical scheme, the power supply power of a POE device can be increased, data transmission cannot be affected, the safety of power source receiving can be effectively guaranteed, and the working stability of the system device is improved.

Description

technical field [0001] The invention relates to the technical field of power over Ethernet, in particular to a POE power receiving method and a POE power receiving device. Background technique [0002] POE (Power over Ethernet) power over Ethernet technology refers to the transmission of data signals for some IP-based terminal equipment without any modification to the existing Ethernet Cat.5 cabling infrastructure. Technology for providing DC power to such equipment (system equipment). The advantages of POE power supply are: 1. Simple installation, simple wiring, no need to arrange power cords, as long as Ethernet cables are arranged to supply power to system equipment; 2. In some special network environments (such as overhead), no It is convenient to arrange the power cord / power adapter, and the power supply within a distance of 100M can be easily achieved by using an Ethernet cable. [0003] At present, there are two specifications for POE power supply, IEEE802.3af and I...

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Problems solved by technology

[0005] The existing method of increasing the power of POE power supply is mainly to increase the output voltage or output current of the PSE power supply equipment. Although this method can achieve power improvement to a certain extent, the technical problems faced are: First, the current carrying capacity of the cable and The problem of heat dissipation reduces the life of the insulation layer of the cable, and there are potential safety hazards; the second is the increase of the DC current in the data transformer, and the small resistance imbalance in the parallel power supply path causes an offset current in the transformer, which will reduce the inductance of the transformer. This reduction in inductance will degrade the data transmission characteristics, and, in severe cases, it will lead to a high bit error rate (BER) or complete loss of data, especially in the Gigabit Ethernet environment.

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