CN214380931U

CN214380931U - Isolated POE

Info

Publication number: CN214380931U
Application number: CN202120485931.0U
Authority: CN
Inventors: 何军; 来小平; 吴凯
Original assignee: Huagong Zhengyuan Intelligent Terminal Xiaogan Co ltd
Current assignee: Huagong Zhengyuan Intelligent Terminal Xiaogan Co ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-10-08
Anticipated expiration: 2031-03-05

Abstract

The utility model discloses an isolated POE, including mesh end, effect transistor, power chip, transformer module and opto-coupler switch module, mesh end and effect transistor electric connection, effect transistor and power chip electric connection, transformer module and opto-coupler switch module all with power chip electric signal connection, transformer module and opto-coupler switch module electric connection; the utility model discloses an input and output GND mode not altogether, it must also be better than non-isolation above the protection, can not have the trouble that the circuit does not supply power, plays the effect to equipment protection when accomplishing POE power supply function, under many PD equipment connection condition, can effectually protect equipment, and practicality and reliability are obviously superior to non-isolated POE.

Description

Isolated POE

Technical Field

The utility model relates to an ethernet equipment technical field, concretely relates to isolated form POE.

Background

POE refers to a technology that, under the condition that the existing ethernet cat.5 wiring infrastructure is not changed, dc power supply can be provided for some IP-based terminals (such as an IP telephone, a wireless local area network access point AP, a network camera, etc.) while transmitting data signals; the POE technology can ensure the safety of the existing structured wiring and ensure the normal operation of the existing network, thereby reducing the cost to the maximum extent; POE, also known as local area network based power systems or active ethernet, sometimes also referred to simply as power over ethernet, is a recent standard specification for simultaneous data and electrical power transfer using existing standard ethernet transmission cables, and maintains compatibility with existing ethernet systems and users.

The existing non-isolated POE adopts the situation that when a non-isolated module is matched with a POE switch for use, a plurality of POE switch ports do not supply power; when a plurality of non-isolated PD products connected with GND are connected, namely the cathodes of the non-isolated PD products are connected together, so that the power supply current does not necessarily flow back from the respective network ports, and can flow back from one port, which causes the PSE1 end to detect a large current, and the power supply is disconnected due to overload, so that an isolated POE is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the non-isolated PD product that exists of prior art as a plurality of GND that connect and when inserting, be equivalent to their negative pole and all received together, supply current just so need not be from respective net gape backward flow, probably from a port backward flow, can cause PSE1 end to detect the heavy current like this, because transship and break off the problem of power supply, an isolated POE is provided, this isolated POE has the mode that adopts input and output not GND, it is superior to non-isolated POE in the aspect of the protection, the trouble that the circuit did not supply power can not exist, play the effect to the effect of equipment protection when accomplishing POE power supply function.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an isolated form POE, includes mesh end, effect transistor, power chip, transformer module and opto-coupler switch module, mesh end and effect transistor electric connection, effect transistor and power chip electric connection, transformer module and opto-coupler switch module all with power chip electric signal connection, transformer module and opto-coupler switch module electric connection, mesh end, effect transistor, power chip, transformer module and opto-coupler switch module all are located protective housing's inside.

Preferably, protective housing one side is provided with RJ45 net gape seat and PD end joint, the protective housing outside is provided with the thermovent, RJ45 net gape seat includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 and pin 8.

Preferably, the PD terminal connector is electrically connected to PSE equipment, the PSE equipment is located inside the protective casing, and the power chip is located inside the PSE equipment.

Preferably, a feedback amplifier is arranged inside the power supply chip.

Preferably, the pin 1, the pin 2, the pin 3 and the pin 6 are all in electrical signal connection with a network port end.

Preferably, the

pins

5 and 7 are electrically connected with the effect transistor, and the pins 4 and 8 are respectively grounded.

Preferably, one side of the protective shell is uniformly provided with a plurality of PD end connectors, the PD end connectors are respectively electrically connected with PD end equipment, and cathodes of the PD end equipment are all grounded.

Compared with the prior art, the utility model provides an isolated form POE possesses following beneficial effect:

1. the utility model adopts the mode that the input end and the output end are not in the same GND, the protection is better than the non-isolation, the fault that the circuit does not supply power can not exist, and the POE power supply function and the equipment protection function can be realized;

2. the utility model discloses under many PD equipment connection conditions, can effectually protect equipment, practicality and reliability are obviously superior to non-isolated POE.

Drawings

Fig. 1 is a schematic perspective view of an isolated POE structure provided by the present invention;

fig. 2 is a schematic diagram of the association of an isolated POE provided by the present invention;

fig. 3 is a schematic diagram of a current flow direction of a network port in an isolated POE.

Description of the reference numerals

The protection device comprises a protective shell 1, an RJ45 network port seat 2, a PD end connector 3, a network port end 4, an effect transistor 5, a power supply chip 6, a transformer module 7, an optocoupler switch module 8, a feedback amplifier 9 and a heat dissipation port 10.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides an isolated form POE, including net gape end 4, effect transistor 5, power chip 6, transformer module 7 and opto-coupler switch module 8, net gape end 4 and 5 electric connection of effect transistor,

effect transistor

5 and 6 electric connection of power chip, transformer module 7 and opto-coupler switch module 8 all with 6 electric signal connection of power chip, transformer module 7 and 8 electric connection of opto-coupler switch module, net gape end 4, effect transistor 5, power chip 6, transformer module 7 and opto-coupler switch module 8 all are located protective housing 1's inside.

The utility model discloses in, preferred, 1 one side of protective housing is provided with RJ45 net gape seat 2 and PD end connector 3, and the 1 outside of protective housing is provided with thermovent 10, and RJ45 net gape seat 2 includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 and pin 8.

The utility model discloses in, preferred, PD end connector 3 and PSE equipment electric connection, PSE equipment are located protective housing 1's inside, and power chip 6 is located inside the PSE equipment, supplies power to the equipment that PD end connector 3 is connected through the inside PSE equipment of protective housing 1.

The utility model discloses in, preferred, power chip 6 is inside to be provided with feedback amplifier 9, through comparison Vfb and inside reference voltage, adjusts the PWM waveform on primary side effect transistor 5 and vice limit to play the effect of adjusting output voltage, made it adjust predetermined output voltage value.

The utility model discloses in, preferred, pin 1, pin 2, pin 3 and pin 6 all with net gape end 4 electricity signal connection.

The utility model discloses in, preferred, pin 5 and pin 7 all with 5 signal connection of telecommunication of effect transistor, pin 4 and pin 8 ground connection respectively.

The utility model discloses in, preferred, 1 one side of protective housing evenly is provided with PD end connector 3, a plurality of PD end connector 3 respectively with PD end equipment electric connection, the equal ground connection of negative pole of a plurality of PD end equipment.

The utility model discloses a theory of operation and use flow: when the device is used, a plurality of non-isolated PD products connected with GND are accessed through the PD end connector 3 on one side of the protective shell 1, and power is supplied to equipment connected with the PD end connector 3 through PSE equipment in the protective shell 1, when power supply current flows back, the current of the current i1 can only flow back from the port 1, the current i2 can only flow back from the port 2, the current in can only flow back from the port n, and the problem that the power supply current of each port flows back from one port, so that the power supply is disconnected when the PSE1 end detects that large current is overloaded; a feedback amplifier 9 is arranged in the power supply chip 6, and the PWM waveforms of the primary side effect transistor 5 and the secondary side are adjusted by comparing Vfb with an internal reference voltage, so that the effect of adjusting the output voltage is achieved, and the output voltage is adjusted to a preset output voltage value; the feedback of the optocoupler is realized by using the change of the current of the secondary side caused by the change of the current of the primary side, and the amplification factor of the optocoupler current is greatly influenced by temperature and can change along with the change of the temperature; the isolation type POE power supply is characterized in that direct current is transmitted on a core wire used for transmitting data at the same time, and the power transmission adopts a frequency different from that of an Ethernet data signal; idle data transmission ports are not occupied any more, so that the utilization efficiency of transmission interfaces is improved; on the other hand, if the device is operated indoors, the limitation of the socket AC is avoided, and the cost of the adapter can be reduced; meanwhile, under the condition that a plurality of PD devices are connected, the devices can be effectively protected; although the isolated POE is higher in cost than the non-isolated POE, it is significantly superior to the non-isolated POE in practicality and reliability.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. In the technical idea scope of the present invention, it can be right to the technical solution of the present invention perform multiple simple modifications, including each technical feature combined in any other suitable manner, these simple modifications and combinations should be regarded as the disclosed content of the present invention, and all belong to the protection scope of the present invention.

Claims

1. An isolated POE comprises a mesh end (4), an effect transistor (5), a power chip (6), a transformer module (7) and an optocoupler switch module (8), and is characterized in that: mesh end (4) and effect transistor (5) electric connection, effect transistor (5) and power chip (6) electric connection, transformer module (7) and opto-coupler switch module (8) all with power chip (6) electric signal connection, transformer module (7) and opto-coupler switch module (8) electric connection, mesh end (4), effect transistor (5), power chip (6), transformer module (7) and opto-coupler switch module (8) all are located the inside of protecting sheathing (1).

2. The isolated POE according to claim 1, wherein one side of the protection shell (1) is provided with an RJ45 socket (2) and a PD end connector (3), the outer side of the protection shell (1) is provided with a heat dissipation port (10), and the RJ45 socket (2) comprises a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7 and a pin 8.

3. An isolated POE according to claim 2, wherein the PD termination (3) is electrically connected to PSE equipment, the PSE equipment being located inside the protective enclosure (1), the power chip (6) being located inside the PSE equipment.

4. Isolated POE according to claim 1, wherein a feedback amplifier (9) is arranged inside the power chip (6).

5. Isolated POE according to claim 2, wherein pin 1, pin 2, pin 3, and pin 6 are all electrically connected to the mesh end (4).

6. Isolated POE according to claim 2, wherein pin 5 and pin 7 are electrically connected to the effect transistor (5), and pin 4 and pin 8 are connected to ground, respectively.

7. The isolated POE of claim 2, wherein PD end connectors (3) are uniformly arranged on one side of the protective shell (1), the PD end connectors (3) are respectively electrically connected with PD end equipment, and the cathodes of the PD end equipment are all grounded.