Outdoor high-power POE mid-span

Abstract

The utility model discloses a high-power POE mid-span used outdoors. The high-power POE mid-span comprises a phoenix terminal used for being connected with a direct-current power supply, an isolation booster circuit, a POE chip, a network transformer, two RJ45 modules and a sealing shell. The isolation booster circuit is used for increasing the voltage of a direct-current power supply connected to the phoenix terminal to a standard POE voltage; the first RJ45 module is used as a first port, and the second RJ45 module is used as a second port; the second port serves as an output end of the high-power POE mid-span and is used for providing a POE power supply; the first port serves as a signal input end and is used for receiving a network data signal; the first port couples a received network data signal to the signal output end of the second port through the network transformer, so that the second port is also used for outputting the network data signal; the sealing shell is used for sealing, wrapping and isolating the booster circuit, the POE chip and the network transformer, and the first port, the second port and the phoenix terminal are exposed. The POE mid-span provided by the utility model can be used in an outdoor rainy environment and can output a POE power supply with higher power.

Description

Technical Field

[0001] The utility model relates to the cross - technology field in POE, in particular to a high - power POE midspan for outdoor use. Background Art

[0002] With the wide application of network video surveillance, the requirement of providing power support through the Ethernet itself is becoming more and more urgent. In most cases, access point devices need DC power supply, and access point devices are usually installed on ceilings at relatively high positions from the ground or outdoors, and it is very difficult to have a suitable power socket nearby. Even if there is a socket, it is difficult to find a place to install the AC - DC converter required by the access point device. In many large - scale LAN applications, administrators need to manage multiple access point devices at the same time. These devices require unified power supply and unified management, which brings great inconvenience to power supply management. Power over Ethernet (POE) just solves this problem. Devices that do not support POE power can be powered by connecting to a POE midspan through a network cable. A POE midspan (MIDSPAN), commonly known as a POE power supply box, is applied between a common router and network terminal devices to supply power to network terminal devices through a network cable.

[0003] Nowadays, the market demand for POE midspans is increasing, but existing midspans usually have a gigabit rate, and most of their usage environments are indoor environments, greatly restricting the usage conditions of the machines. In addition, the power of ordinary midspans is generally only 30W. With the development of technology, high - power PC devices are everywhere, and 30W midspans are obviously insufficient. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a high - power POE midspan for outdoor use, which can solve the limitation that ordinary POE midspans cannot be used in outdoor rainy environments and output a higher - power POE power supply.

[0005] To solve the above - mentioned technical problem, the utility model discloses a high - power POE midspan for outdoor use, which includes a phoenix terminal for connecting a DC power supply, an isolation boost circuit, a POE chip, a network transformer, two RJ45 modules, and a sealed housing;

[0006] The phoenix terminal is electrically connected to the input end of the isolation boost circuit for inputting DC power to the isolation boost circuit; the isolation boost circuit is used to boost the voltage of the DC power input by the phoenix terminal to the standard POE voltage; the output end of the isolation boost circuit is electrically connected to the power supply end of the POE chip;

[0007] The first RJ45 module serves as the first port, and the second RJ45 module serves as the second port;

[0008] The control terminal of the POE chip is electrically connected to the negative terminal of the POE power supply at the second port, and the output terminal of the isolation boost circuit is electrically connected to the positive terminal of the POE power supply at the second port; the second port serves as the output terminal of the high-power POE mid-span and is used to provide the POE power supply.

[0009] The first port serves as a signal input terminal for receiving network data signals; the network data signals received by the first port are coupled to the signal output terminal of the second port through the network transformer, so that the second port is also used to output network data signals.

[0010] The sealed housing is used to hermetically wrap the isolation boost circuit, the POE chip, and the network transformer, and expose the first port, the second port, and the phoenix terminal.

[0011] As an alternative implementation, the network transformer is a 2.5G network transformer.

[0012] As another alternative implementation, the material of the sealed housing is a pure metal material, a pure non-metal material, or a composite material.

[0013] As another alternative implementation, the material of the sealed housing is pure aluminum or an aluminum-based composite material.

[0014] As another alternative implementation, the phoenix terminal is connected to a direct current of 24 to 56V, and the standard POE voltage is 48 to 57V.

[0015] As another alternative implementation, the isolation boost circuit includes a power chip, a transformer, an MOS transistor, and a filtering module; the transformer includes a primary winding, an auxiliary winding, and a secondary winding.

[0016] As another alternative implementation, the filtering module is provided on the line from the input terminal of the isolation boost circuit to the primary winding.

[0017] As another alternative implementation, the first end of the primary winding is sequentially connected to the second end of the primary winding through a diode and a resistor, and a capacitor is connected in parallel with the resistor.

[0018] As another alternative implementation, the first end of the primary winding is grounded through the MOS transistor; the gate of the MOS transistor is connected to the output terminal of the power chip.

[0019] As another alternative implementation, the output of the secondary winding is electrically connected to an optocoupler and is electrically connected to the feedback control terminal of the power chip through the optocoupler.

[0020] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0021] Compared with the conventional POE midspan, the POE midspan of the embodiment of the present utility model adopts a waterproof housing, with a wider range of applications, solving the limitation that ordinary POE midspans cannot be used in rainy outdoor environments; through the isolation boost circuit to boost the voltage to the standard POE voltage and the POE chip to achieve a POE power output of up to 60W - 90W; the input uses a JR45 module for electrical isolation, and the output uses an isolation boost circuit for electrical isolation, enabling both the input and output to have an isolation design, improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram of a high-power POE midspan for outdoor use disclosed in the embodiment of the present utility model;

[0024] Figure 2 is a schematic circuit diagram of an isolation boost circuit of a high-power POE midspan for outdoor use disclosed in the embodiment of the present utility model;

[0025] Figure 3 is a schematic structural diagram of an RJ45 module of a high-power POE midspan for outdoor use disclosed in the embodiment of the present utility model;

[0026] Figure 4 is a schematic structural diagram of a POE chip of a high-power POE midspan for outdoor use disclosed in the embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] See Figures 1 to 4 , the embodiment of the present utility model discloses a high-power POE midspan for outdoor use, including a phoenix terminal K for connecting a DC power supply, an isolation boost circuit L, a POE chip U1, a network transformer T2, two RJ45 modules, and a sealing case J;

[0029] The phoenix terminal K is electrically connected to the input end of the isolation boost circuit L, and is used to input a DC power supply to the isolation boost circuit L; the isolation boost circuit L is used to boost the voltage of the DC power supply connected by the phoenix terminal K to the standard POE voltage; the output end of the isolation boost circuit L is electrically connected to the power supply end of the POE chip U1;

[0030] The first RJ45 module serves as the first port RJ1, and the second RJ45 module serves as the second port RJ2;

[0031] The control end of the POE chip U1 is electrically connected to the negative pole of the POE power supply of the second port RJ2, and the output end of the isolation boost circuit is electrically connected to the positive pole of the POE power supply of the second port RJ2; the second port RJ2 serves as the output end of the high-power POE midspan and is used to provide a POE power supply;

[0032] The first port RJ1 serves as a signal input end and is used to receive network data signals; the first port RJ1 couples the received network data signals to the signal output end of the second port RJ2 through the network transformer T2, so that the second port RJ2 is also used to output network data signals;

[0033] The sealing case is used to seal and wrap the isolation boost circuit, the POE chip U1 and the network transformer T2, and exposes the first port RJ1, the second port RJ2 and the phoenix terminal K.

[0034] The POE midspan of the embodiment of the present invention is used to provide a POE power supply for a powered device; the powered device is a PD device, such as a network terminal device.

[0035] When the first port RJ1 (only network data signals, no POE power supply) is connected, due to the long distance, there is no power in the input POE part. At this time, the high-power POE midspan of the embodiment of the present invention is connected in series on the path. After the signal is connected, the network data signals are coupled to the second port RJ2 through the network transformer T2 and transmitted out. In addition, after the voltage input through the phoenix terminal K is boosted to the standard POE voltage (48V - 57V) through the boost part, and then through the POE chip U1, the lossless POE power is supplied to the second port RJ2. At this time, the second port RJ2 has network data signals and lossless high-power POE, and these signals and power are transmitted to the connected PD device, completing the extension of the POE power. The POE chip U1 of the embodiment of the present invention directly uses the standard POE voltage as the working voltage to achieve lossless POE power output, and the POE power can be as high as 60W - 90W.

[0036] Compared with the conventional POE midspan, the POE midspan of the embodiment of the present utility model adopts a waterproof housing, has a wider range of use, and solves the limitation that ordinary POE midspans cannot be used in outdoor rainy environments; through the isolation boost circuit L to boost the voltage to the standard POE voltage and the POE chip U1 to achieve a POE power output of up to 60W - 90W; the input uses a JR45 module for electrical isolation, and the output uses the isolation boost circuit L for electrical isolation, so that both the input and output have an isolation design, improving safety.

[0037] Optionally, the phoenix terminal K can be a 2PIN, 3PIN or more than 3PIN terminal.

[0038] In an alternative embodiment, the network transformer T2 is a 2.5G network transformer T2, so that the transmission rate can support rates of 2.5G and below.

[0039] In yet another alternative embodiment, the material of the sealing shell J is a pure metal material, a pure non-metal material or a composite material.

[0040] In yet another alternative embodiment, the material of the sealing shell J is pure aluminum or an aluminum-based composite material. In addition to waterproofing, it also has good heat dissipation ability and good protection effect.

[0041] In yet another alternative embodiment, the phoenix terminal K is connected to a direct current of 24 - 56V, and the standard POE voltage is 48 - 57V. The POE chip U1 regulates the current of POE so that the POE power can reach 60W - 90W.

[0042] In yet another alternative embodiment, the isolation boost circuit L includes a power supply chip U2, a transformer T1, a mos tube Q1, and a filtering module EC1; the transformer T1 includes a primary winding, an auxiliary winding, and a secondary winding. This enables the POE midspan to have transformer isolation inside, further improving safety.

[0043] In yet another alternative embodiment, the filtering module EC1 is provided on the line from the input end of the isolation boost circuit L to the primary winding.

[0044] In yet another alternative embodiment, the first end of the primary winding is sequentially connected to the second end of the primary winding through a diode and a resistor, and a capacitor is connected in parallel with the resistor. When the primary winding releases the stored electrical energy after power-off, the primary winding can form a discharging circuit through the diode and the resistor, and the resistor is used to consume the electrical energy released by the primary winding, where the capacitor plays a protective role.

[0045] In yet another alternative embodiment, the first end of the primary winding is grounded through the mos tube Q1; the gate of the mos tube Q1 is connected to the output end of the power supply chip U2.

[0046] In yet another alternative embodiment, the output of the secondary winding is electrically connected to an optocoupler and is electrically connected to the feedback control terminal of the power supply chip U2 through the optocoupler. The output terminal and the power supply chip U2 are isolated by the optocoupler to protect the power supply chip U2. This enables the POE to have both transformer isolation and optocoupler isolation inside, further enhancing safety.

[0047] In yet another alternative embodiment, the third end of the auxiliary winding is grounded, and its fourth end is connected to the power input terminal of the power supply chip U2 through a diode and a resistor.

[0048] In yet another alternative embodiment, the secondary winding is first rectified by a diode D3 and then connected to a filtering module C5 composed of two parallel capacitors; it also includes a capacitor and a resistor, and the capacitor and the resistor are connected in series and then in parallel with the diode D3. The series connection of the capacitor and the resistor is used for surge absorption.

[0049] The following takes Figures 1 to 4 as an example for illustration:

[0050] When a 2.5G PD device (i.e., a power-consuming device, such as a network terminal device) needs to use a midspan during transmission, first connect the phoenix terminals at the input end to a DC 24 - 56V input power supply to supply power to the 2.5G midspan first. After the input power supply enters, it will pass through the filtering capacitors EC1 and C2 to filter out the clutter and then reach the high-frequency transformer T1. At this time, the PWM power control chip U2 and the high-frequency transformer source-end absorption part (D5, R12, R8, C3) are connected in parallel on the path. After reaching the high-frequency transformer, the PWM control chip U2 also starts to work through the voltage division of the start-up resistor R10, starts to give a high voltage to the gate of the switching MOS transistor Q1, drives the MOS transistor to open, and discharges the energy just stored in the primary side of the high-frequency transformer through the MOS transistor. Because the high-frequency transformer is a magnetic component, when the primary coil releases energy, the secondary coil starts to store energy, and then when the primary coil stores energy again, the secondary coil starts to release energy, and through the Schottky diode D3, the output filtering capacitors C5 and C6 start to output a stable POE voltage (48V - 57V). The optocoupler in the feedback part and the TL431 are connected in parallel on the input circuit to provide a feedback signal to the power supply chip;

[0051] When the boost circuit has boosted the input 24V - 57V to the standard POE voltage (48V - 57V), at this time the POE voltage will be first supplied to the POE chip; the POE chip U1 controls the negative pole of the POE power supply of the RJ2 port, and the positive pole DC55V is directly connected to the RJ2 port. It is responsible for providing the POE power supply to the RJ2 port (i.e., the output port, the port connected to the PD device).

[0052] When the RJ1 port (input port, only network data signal, no POE power) is connected, due to the long distance, there may be no power in the input POE part. At this time, a high-power outdoor waterproof 2.5G mid-span is connected in series on the path. After the signal is connected, the high-speed signal is coupled to the RJ2 port (output port) through the 2.5G network transformer T2 and transmitted. In addition, the voltage through the input phoenix terminal is raised to the standard POE voltage after passing through the boost part, and then through the POE chip U1, the lossless POE power is supplied to the RJ2 port. At this time, the RJ2 port has network data signal and lossless high-power POE, and these signals and power are transmitted to the connected PD device to complete the extension of the POE power.

[0053] What is disclosed in the content of the embodiments of the present invention is only the preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high-power POE midspan for outdoor use, characterized in that: Includes Phoenix terminal for connecting DC power supply, isolation boost circuit, POE chip, network transformer, two RJ45 modules and sealed shell; The Phoenix terminal is electrically connected to the input end of the isolation boost circuit, and is used to input a DC power supply to the isolation boost circuit; the isolation boost circuit is used to increase the voltage of the DC power supply connected to the Phoenix terminal to the standard POE voltage; the output end of the isolation boost circuit is electrically connected to the power supply end of the POE chip; The first RJ45 module serves as a first port, and the second RJ45 module serves as a second port; The control end of the POE chip is electrically connected to the negative end of the POE power supply of the second port, and the output end of the isolation boost circuit is electrically connected to the positive end of the POE power supply of the second port; The second port is used as an output end of the high-power POE midspan to provide POE power; The first port is used as a signal input terminal for receiving a network data signal; the first port couples the received network data signal to the signal output terminal of the second port through the network transformer, so that the second port is also used for outputting the network data signal; The sealing shell is used to seal and wrap the isolation boost circuit, the POE chip and the network transformer, and expose the first port, the second port and the Phoenix terminal.

2. The high-power POE midspan according to claim 1, characterized in that: The network transformer is a 2.5G network transformer.

3. The high-power POE midspan according to claim 1, characterized in that: The sealing shell is made of pure metal material, pure non-metal material or composite material.

4. The high-power POE midspan according to claim 1, characterized in that: The sealing shell is made of pure aluminum or an aluminum-based composite material.

5. The high-power POE midspan according to claim 1, characterized in that: The Phoenix terminal is connected to 24-56V DC power, and the standard POE voltage is 48-57V.

6. The high-power POE midspan according to claim 1, characterized in that: The isolated boost circuit includes a power chip, a transformer, a MOS tube, and a filter module; the transformer includes a primary winding, an auxiliary winding, and a secondary winding.

7. The high-power POE midspan according to claim 6, characterized in that: The filtering module is provided on the line from the input end of the isolation boost circuit to the primary winding.

8. The high-power POE midspan according to claim 6, characterized in that: The first end of the primary winding is connected to the second end of the primary winding through a diode and a resistor in sequence, and the resistor is connected in parallel with a capacitor.

9. The high-power POE midspan according to claim 6, characterized in that: The first end of the primary winding is grounded via the MOS tube; the gate of the MOS tube is connected to the output end of the power chip.

10. The high-power POE midspan according to claim 6, characterized in that: The output of the secondary winding is electrically connected to an optocoupler, and is electrically connected to the feedback control terminal of the power chip via the optocoupler.

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