Ethernet power receiving equipment and its protection method
A technology of power receiving equipment and Ethernet, applied in the direction of emergency protection circuit devices, electrical components, circuit devices, etc. for limiting overcurrent/overvoltage
Active Publication Date: 2010-07-21
北京紫光通信科技集团有限公司
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Problems solved by technology
However, in order to be compatible with the 802.3af standard, the powered device PD in the Ethernet must use a rectifier bridge, and the rectifier bridge will combine the irrelevant 1, 2, 3, 6 wires and 4, 5, 7, 8 wires, making Under the two power supply modes, the protective primary and secondary devices of U1 are replaced with each other, and the protection schemes under the two power supply modes cannot be taken into account at the same time. Therefore, when the powered device PD needs to support the above two power supply schemes, it cannot be higher. level of protection
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.
[0030] Figure 4 It is a schematic diagram of the first embodiment of the internal circuit of the power receiving equipment of the present invention. Such as Figure 4 As shown, the internal circuit of the powered device in this embodiment is the same as figure 1 The difference of the internal circuit of the existing power receiving equipment shown is that the grounded varistors R3 and R4 are respectively added on the two lines between the rectifier bridge L1 and the power over Ethernet control chip U1, that is, the varistors One end of the resistors R3 and R4 is grounded, and the other end is respectively connected to two lines between the rectifier bridge L1 and the power over Ethernet control chip U1.
[0031] exist Figure 4 Due to ...
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The present invention discloses an Ethernet power receiving equipment, which includes: at Least two group different circuits processing electric supply to net mouth respectively, rectifying bridge connecting with the net mouth, connecting with net mouth and net mouth primary protection device for protecting produced transient heavy pressure on each group circuit and Ethernet electric supply control chip connecting to rectifying bridge, the power receiving equipment also includes protection device for protecting the Ethernet electric supply control chip, and one end of the protection device contacting earth, other end connecting circuit between rectifying bridge and Ethernet control chips, or the other end connecting circuit between rectifying bridge and the net mouth primary protection device. The present invention also discloses a protection method for Ethernet power receiving equipment. The technical project of the present invention can enhance protection class level of Ethernet power receiving equipment.
Description
Technical field [0001] The present invention involves Ethernet power supply technology, especially the protection methods of Ethernet's electricity equipment and the corresponding Ethernet electric equipment corresponding to it. Background technique [0002] Ethernet Power Supply Technology (POE, Power Over Ethernet) refers to the existing Ethernet CAT.5 wiring infrastructure without any changes.While IP -based terminal transmission data signals, they can also provide DC technology for such devices.POE technology can ensure the normal operation of existing networks while ensuring the security of existing structured wiring, and minimize costs. [0003] A complete POE system includes two parts: PSE, Power Sourcing Equipment and PowerEd Device (PD, PowerEd Device).The core of the POE technology is to transmit the rated voltage from PSE to PD from Ethernet cables through the Ethernet cable. [0004] For the power supply method, the standard Ethernet cable has 8 twisted cables in the ...
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IPC IPC(8): H04L12/10H02H9/04
Inventor 陈鹏
Owner 北京紫光通信科技集团有限公司