CN2708587Y - A near end power supply equipment for VDSL remote power supply system - Google Patents

Abstract

The utility model relates to the communication class, in particular to the broadband access technology of the communication class, in particular to the near end power supply device for a VDSL remote power supply system. The near end power supply device for a VDSL remote power supply system mainly comprises a main ACDC power module and a filter, wherein, the main ACDC power module is connected to the filter. When near end power supply device for a VDSL remote power supply system is used, one end of the main ACDC power module is connected with commercial power, and the other end is connected to the filter which is respectively connected to the terminal port of a VDSL exchanger and the VDSL terminal of the multi-user of the far-end power. The near end power supply device for a VDSL remote power supply system has the advantages that the centralized power supply of the VDSL terminal of the multi-user of the far-end power receiving can be realized without using a local power supply.

Description

A kind of near-end power supply unit that is used for the VDSL remote electric power system

Technical field

The utility model relates to communication class, particularly relates to the broadband access technology in the communication class, is exactly a kind of near-end power supply unit of remote electric power system of the VDSL of being used for circuit concretely.

Background technology

The means of communication broadband access have at present experienced the qualitative leap of analogue technique to digital technology, VDSL (Very high-speed Digital Subscriber Line) is a kind of in Digital Subscriber Line (DSL) technology, length be 1.5Km with interior common phone copper cash on high energy with the 52Mbit/s rate transmissioning data, transmission rate almost exceeds 7 times than ADSL, can support symmetry and asymmetric two kinds of application models, use original telephone network and need not rewiring, economical and practical, on the same line road, realize voice, data, the high-speed transfer of video is one of optimal house lead in means of present FTTB.Traditional VDSL terminal all is to power as shown in Figure 1 at user side, has only the connection of data-signal between VDSL switch and the terminal, as shown in Figure 1, the power supply of VDSL terminal substantially all is to adopt the ACDC power supply adaptor that 220VAC is converted to low-voltage DC, resupply the VDSL terminal, single user VDSL terminal all is installed in the closer place of user's family distance calculation basically, getting 220VAC civil power ratio is easier to, but if multi-user VDSL terminal then can not be installed in certain user's family, can only be installed in the common part of several users, there is following drawback in such supply power mode:

1., then can't carry out equipment and install if common part does not have the 220VAC supply socket;

2. even the 220VAC supply socket is arranged, the electricity charge also must be paid power department by telecommunication department, have increased the manpower and financial resources expenditure of telecommunication department virtually;

3. can't realize the plug and play of equipment, equipment also must wait the power supply layout of power department to put in place and can normally use after finishing installation;

4. if having a power failure then can't provide broadband inserting service, there is the crisis of customer churn for the user;

Summary of the invention

The purpose of this utility model is according to above-mentioned the deficiencies in the prior art part, provide a kind of can long-range near-end power supply unit of powering for multi-user VDSL terminal, this equipment can be disposed in the VDSL switch near-end in the machine room, utilizes original telephone line to provide electric power for far-end is subjected to electric multi-user VDSL terminal.

The utility model purpose realizes being finished by following technical scheme:

The utility model mainly is made of main ACDC power module, filter, and wherein main ACDC power module connects filter.

When the utility model used, its main ACDC power module one end was electrically connected with the city, and the other end connects filter, and port and far-end that filter connects the VDSL switch respectively are subjected to electric multi-user VDSL terminal.

The quantity of main ACDC power module is corresponding one by one with the port number of VDSL switch.

Main ACDC power module is made up of the Switching Power Supply of 24 single AC220V inputs, DC75V output, and each switching power source chip all has short-circuit protection, overcurrent protection and heat protection function.The selection that obvious quantity is 24 is to determine according to actual needs.

The utility model has the advantages that, can realize that far-end is subjected to electric multi-user VDSL terminal centrally connected power supply, need not provide local power supply, far-end is subjected to electric multi-user VDSL terminal can be installed in building, corridor Anywhere, the influence of having avoided problems such as AC power rewiring, power failure to cause to real time data, with low cost, easy construction, arrangement rapidly, can accomplish plug and play, make broadband access become a kind of general and economic access way, be particularly suitable for the broadband access transformation of existing complete community.

Summary of drawings

Accompanying drawing 1 prior art VDSL multiple users holder Piao schematic diagram;

Accompanying drawing 2 is used VDSL multiple users holder Piao schematic diagram of the present utility model;

Accompanying drawing 3 is used system configuration schematic diagram of the present utility model;

Accompanying drawing 4 is a structured flowchart of the present utility model;

Accompanying drawing 5 (I) is subjected to the structural principle schematic diagram of the implementation method I of electric multi-user VDSL terminal normal power supply indication for the utility model indicating remote;

Accompanying drawing 5 (II) is subjected to the structural principle schematic diagram of the implementation method II of electric multi-user VDSL terminal normal power supply indication for the utility model indicating remote;

Accompanying drawing 6 is the utility model low pass filter and circuit over-current over-voltage protection implementation method schematic diagram;

Accompanying drawing 7 is the utility model master ACDC power module principle assumption diagram;

Accompanying drawing 8 is the utility model fan for cooling modular structure principle schematic;

Concrete technical scheme

The utility model feature and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technical staff's of the same trade understanding:

Embodiment: shown in Fig. 2-8; the present embodiment product has adopted 1 inch standard PC case design as shown in Figure 4; mainly constitute: comprise main ACDC power module by four modules; power supply status and user's power supply state indicating module; low pass filter and circuit overcurrent and overvoltage protective module; the fan for cooling module; wherein the fan for cooling modular structure directly is connected with the AC220V alternating current with main ACDC power module; the direct current of main ACDC power module output is connected to user's power supply state indicating module; this module is transferred to direct current and is connected to out connector after low pass filter and circuit overcurrent and overvoltage protective module mix the VDSL signal; whether user's power supply state indicating module indicates the power supply on every road working properly, simultaneously to the every road output whether normal power supply of indication user of sampling.

Main ACDC power module, be provided with 24 altogether, each power module can be converted to AC220V the output of DC72V direct current, the peak power output of each module is 15W, this module has soft start simultaneously, function such as short-circuit protection and overload protection, as shown in Figure 7, this module is by 24 single AC220V inputs, the Switching Power Supply of DC 72V output is formed, each switching power source chip all has short-circuit protection, overcurrent protection and heat protection function, its operation principle is: alternating current 220V is through rectifying and wave-filtering, control by the power supply control integrated circuit, high frequency square wave at the elementary generation 100Khz of transformer, by the transformer step-down rectifier, produce the direct voltage that needs after the filtering, the pulse duration of high frequency square wave that the power supply control integrated circuit is adjusted the elementary generation 100Khz of transformer that feeds back to by output voltage reaches the effect of adjusting output voltage stabilization;

Power supply status and user's power supply state indicating module, whether this module indicates the power supply output on every road normal by 24 LED light-emitting diodes, abnormality that also can display power supply simultaneously, 24 LED indicating remotes are subjected to whether normal power supply of electric multi-user VDSL terminal, this function is by the current sample on each outlet line is realized, on circuit, there is a certain size electric current then to represent to have connected far-end and is subjected to electric multi-user VDSL terminal, when not having electric current on the circuit, represent not connect far-end and be subjected to electric multi-user VDSL terminal, shown in Fig. 5 (I), the light-emitting diode of power supply indication can indicate whether to have voltage to export from main ACDC power module having under the voltage condition, if far-end is not connected by electric multi-user VDSL terminal, then the DCIN in this module is identical with the voltage of DCOUT end, the b c utmost point of triode does not have not conducting of bias voltage, the light-emitting diode of power supply indication does not work because there being electricity, indication does not have terminal to connect, after if far-end is connected by electric multi-user VDSL terminal, because also having electric current on the line produces, the resistance of series connection can produce voltage drop, this voltage drop meeting makes the b c utmost point of triode apply bias voltage and conducting, the light-emitting diode of power supply indication because connecing power supply conducting luminous, indication has the terminal connection; As Fig. 5 (II), amplifier is connected into the mode of operation of comparator, when not connecting far-end and be subjected to electric multi-user VDSL terminal, then the DCIN in this module is identical with the voltage of DCOUT end, 2 input port voltages of amplifier are identical, the output of amplifier is output not, the light-emitting diode of power supply indication does not work because there is electricity not have, indication does not have terminal to connect, after if far-end is connected by electric multi-user VDSL terminal, because also having electric current on the line produces, the resistance of series connection can produce voltage drop, this voltage drop meeting makes 2 input port voltages of amplifier different and make the output port output high level voltage, the light-emitting diode of power supply indication because connecing power supply conducting luminous, indication has the terminal connection.

Low pass filter and circuit overcurrent and overvoltage protective module, this module can stop the VDSL signal to seal in the present embodiment, prevent that simultaneously overcurrent-overvoltage on the circuit is to the injury of embodiment, as shown in Figure 6, positive temperature coefficient is from replying fuse PTC series connection in the line, play overcurrent protection, PTC can change high resistant into by low-resistance after electric current surpasses setting, thereby stops the destruction of overcurrent to the rear end; Transient Voltage Suppressor TVS parallel connection plays the overvoltage protection effect in the line, and TVS is a low-resistance by the high resistant conducting rapidly after voltage surpasses setting, with the short circuit of overvoltage voltage, thereby stops the destruction of overvoltage voltage to the rear end;

The fan for cooling module comprises that the 12V dc power supply of fan, this module can guarantee that the present embodiment product can be in operate as normal in the rugged environment relatively, as shown in Figure 8, fan is 3, outwards exhausting, make to produce cross-ventilation in the whole power supply cabinet, reach the effect of heat radiation;

Present embodiment in use, the series connection of VDSL switch rear end in machine room inserts the present embodiment product, this product is added to the 72V direct current on the ordinary telephone wiring of transmission VDSL signal.Present embodiment can provide 24 road 72V DC power supply, can provide the power supply of the maximum 15W output in every road for 24 far-ends are subjected to electric multi-user VDSL terminal, and can indicate the operating state (working properly, unusual) of every road power supply and indicating remote to be subjected to electric multi-user VDSL terminal whether to obtain normal power supply.

The near-end electric supply installation of present embodiment can be realized the management of power supply remote centralized, by the near-end electric supply installation, need not power supplied locally, and far-end is subjected to electric multi-user VDSL terminal can easily be installed in sub-district corridor, building etc. Anywhere.

Claims (8)

1, a kind of near-end power supply unit that is used for the VDSL remote electric power system is characterized in that mainly being made of main ACDC power module, filter, and wherein main ACDC power module connects filter.

2, a kind of near-end power supply unit that is used for the VDSL remote electric power system according to claim 1 is characterized in that the quantity of described main ACDC power module is 24.

3, a kind of near-end power supply unit that is used for the VDSL remote electric power system according to claim 1 is characterized in that described filter is a low pass filter.

4, a kind of near-end power supply unit that is used for the VDSL remote electric power system according to claim 1; it is characterized in that described filter is filter and circuit overcurrent and overvoltage protective module; PTC connects in the line in the formation of this module, and the TVS parallel connection in the line.

5, a kind of near-end power supply unit that is used for the VDSL remote electric power system according to claim 1 is characterized in that described main ACDC module is made up of the Switching Power Supply of 24 single AC220V inputs, DC72V output.

6, a kind of according to claim 1 or 5 near-end power supply unit that is used for the VDSL remote electric power system is characterized in that each switching power source chip of described Switching Power Supply all is provided with short-circuit protection, overcurrent protection and thermel protection device.

7, a kind of near-end power supply unit that is used for the VDSL remote electric power system according to claim 1, it is characterized in that also comprising power supply status and user's power supply state indicating module, this module adopts the indication of LED light-emitting diode, the quantity Matching of the quantity of light-emitting diode and main ACDC power module.

8, a kind of near-end power supply unit that is used for the VDSL remote electric power system according to claim 1 is characterized in that also comprising the fan for cooling module.

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