CN103384199B - A power supply method, converter and Ethernet power supply system - Google Patents

Abstract

The invention discloses a power supply method, a converter and an Ethernet power supply system. The power supply method is suitable for an Ethernet power supply system, and the Ethernet power supply system includes: a power supply equipment PSE, a powered equipment PD, and a converter composed of at least two power intake ports, at least one power supply port, and at least one conversion circuit The method includes: the conversion circuit detects the required power consumption value of the power supply port, and adjusts the required input power of the power-taking port connected to the PSE according to the power consumption value; After the input power required by the power intake port is successfully adjusted, the power obtained by the power intake port is combined, and the combined power is output through the power supply port to provide power for the PD. By using the solutions provided by the embodiments of the present invention, the PSE can be implemented to supply power to the PD whose required power consumption value is higher than the power provided by its ports.

Description

A power supply method, converter and Ethernet power supply system

technical field

The invention relates to the technical field of communication, in particular to a power supply method, a converter and an Ethernet power supply system.

Background technique

PoE (Power over Ethernet, Power over Ethernet) refers to providing some IP-based terminals, such as IP telephones, wireless LAN access points AP, A network camera, etc., can also provide a DC power supply technology for the terminal while transmitting data signals. In the prior art, a complete PoE system includes two parts: a PSE (Power Sourcing Equipment, power supply equipment) that supplies power to an Ethernet client device, and a PSE load PD (Powered Device, powered device) that receives power.

As a power supply device, PSE can supply power and transmit signals to PDs through ordinary Ethernet. For 10M/100M Ethernet, only 4 wires (1, 2, 3, 6) are needed for signal transmission, while the remaining 4 wires (4, 5, 7, 8) will serve as power transmission cables. As a powered device, the PD receives the power supply voltage from the PSE and uses this voltage to start working, no additional power adapter is needed, which can save the overall cost and wiring. In the prior art, a specific implementation manner of a PoE system is shown in FIG. 1 . The power supply process of PoE is generally as follows: PSE outputs a small voltage at the port, and then outputs another voltage, and obtains a load impedance through the change of the corresponding current of the two voltages. If the load impedance is within the standard range, then it can be judged Already connected to a standard PD. When a PD is detected, the PSE will classify the PD according to the size of the load impedance, and evaluate the power loss required by the PD, and then supply power to it.

The existing PSE is based on the IEEE 802.3af standard, that is, each port of the PSE supports a maximum power of 15W corresponding to the IEEE 802.3af standard. When faced with the situation that the power consumption required by the PD is greater than 15W, the existing PSE will not be able to directly provide power supply that meets the power requirements for the PD, which has great limitations.

Contents of the invention

In order to solve the above-mentioned technical problems, embodiments of the present invention provide a power supply method, a converter, and a power-over-Ethernet system to enable the PSE to supply power to PDs whose required power consumption is higher than the power provided by their ports. The technical solution is as follows:

A power supply method applicable to a power over Ethernet system, the power over Ethernet system comprising: a power supply equipment PSE, a powered device PD, and a conversion circuit consisting of at least two power intake ports, at least one power supply port, and at least one conversion circuit The converter is arranged between the PSE and the PD, and at least two power-taking ports of the converter are respectively connected to a PSE interface, and one power supply port of the converter is connected to the PD; The methods include:

The conversion circuit detects the power consumption value required by the power supply port, and adjusts the input power required by the power intake port connected to the PSE according to the power consumption value;

After the input power required by the power intake port connected to the PSE interface is successfully adjusted, the power obtained by the power intake port is combined, and the combined power is output through the power supply port to provide power for the PD. ;

Wherein, when the conversion circuit adjusts the input power required by the power intake ports connected to the PSE according to the power consumption value, the input power required by each power intake port connected to the PSE interface is set to be equal, or set The input power required by each power-taking port connected to the PSE interface is set to have a specific proportional relationship.

Wherein, the input power required by the power-taking port connected to the PSE is adjusted according to the power consumption value, specifically:

The conversion circuit adjusts the input impedance of the power intake port connected to the PSE according to the power consumption value, so as to adjust the required input power of the power intake port connected to the PSE.

Correspondingly, an embodiment of the present invention also provides a converter, which is suitable for a power-over-Ethernet system, and the power-over-Ethernet system includes: a power supply equipment PSE and a powered device PD; the converter includes: at least two power-taking port, at least one power supply port and,

It is used to detect the power consumption value required by the power supply port, and adjust the input power required by the power intake port connected to the PSE according to the power consumption value; the input power required by the power intake port connected to the PSE interface After the adjustment is successful, combine the power obtained by the power intake port, and output the combined power through the power supply port, so as to provide power to the conversion circuit for the PD;

Wherein, the converter is arranged between the PSE and the PD, and at least two power-taking ports of the converter are respectively connected to a PSE interface, and one power supply port of the converter is connected to the PD;

Wherein, when the conversion circuit adjusts the input power required by the power intake ports connected to the PSE according to the power consumption value, the input power required by each power intake port connected to the PSE interface is set to be equal, or set The input power required by each power-taking port connected to the PSE interface is set to have a specific proportional relationship.

Wherein, the output end of the load corresponding to the power-taking port connected to the PSE interface in the conversion circuit is combined and then connected to the power supply port.

The embodiment of the present invention also provides an Ethernet power supply system, including: a power supply equipment PSE and a powered device PD; also includes: a converter:

The converters include:

At least two power outlets, at least one power supply port, and at least one power supply port are used to detect the power consumption value required by the power supply port, and adjust the input power required by the power consumption port connected to the PSE according to the power consumption value; After the input power required by the power intake port connected to the PSE interface is successfully adjusted, the power obtained by the power intake port is combined and processed, and the combined power is output through the power supply port to provide power for the PD. Conversion circuit ;

Wherein, the converter is arranged between the PSE and the PD, and at least two power-taking ports of the converter are respectively connected to a PSE interface, and one power supply port of the converter is connected to the PD;

Wherein, when the conversion circuit adjusts the input power required by the power intake ports connected to the PSE according to the power consumption value, the input power required by each power intake port connected to the PSE interface is set to be equal, or set The input power required by each power-taking port connected to the PSE interface is set to have a specific proportional relationship.

Wherein, the output end of the load corresponding to the power-taking port connected to the PSE interface in the conversion circuit is combined and then connected to the power supply port.

In the embodiment of the present invention, the converter is connected between the PSE and the PD; the conversion circuit in the converter detects the power consumption value required by the power supply port connected to the PD, and adjusts the power consumption value of the power intake port connected to the PSE according to the power consumption value. The required input power; after the input power required by the power intake port connected to the PSE interface is successfully adjusted, the power obtained by the power intake port is combined, and the combined power is output through the power supply port, and then can be realized The PSE supplies power to PDs that require a higher power consumption than the power provided by their ports.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of a connection between a PSE and a PD in the prior art;

FIG. 2 is a flowchart of a power supply method provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a circuit structure of a converter provided by an embodiment of the present invention;

FIG. 4 is another structural schematic diagram of the converter shown in FIG. 3 .

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to enable the PSE to supply power to the PD whose required power consumption value is higher than the power provided by its port, the present invention provides a power supply method, a converter and an Ethernet power supply system.

Firstly, a power supply method provided by the present invention will be introduced below.

It should be noted that the power supply method provided by the present invention is applicable to a Power over Ethernet system, and the Power over Ethernet system includes: a power supply equipment PSE, a powered device PD, and at least two power inlets and at least one power supply port and at least one converter circuit. Wherein, the converter is arranged between the PSE and the PD, and at least two power-taking ports are respectively connected to a PSE port, and a power supply port is connected to the PD. It can be understood that the converter can also be used when the power consumption required by the PD is not higher than the power provided by the PSE interface. At this time, connect one power intake port to the PSE port, and one power supply port to the PD, and the converter only serves as a transfer function.

As shown in Figure 2, a power supply method may include:

S101, the conversion circuit in the converter detects the required power consumption value of the power supply port connected to the PD;

When the PSE supplies power to a PD whose power consumption value is higher than the power provided by its interface, the conversion circuit in the converter first detects the power consumption value required by the power supply port connected to the PD, that is, the conversion circuit Power consumption value required to detect PD.

S102, adjusting the input power required by the power intake port connected to the PSE according to the power consumption value;

After determining the power consumption value required by the power supply port, adjust the input power required by the power intake port connected to the PSE interface according to the power consumption value, so that the PSE can output the power of the PSE interface according to the input power required by the power supply port. adjustment, so that the PSE interface of the PSE outputs the input power required by the connected power-taking port.

Wherein, when the conversion circuit of the converter adjusts the input power required by the power intake ports connected to the PSE according to the power consumption value required by the PD, the input power required by each power intake port connected to the PSE interface can be set as or set the input power required by each power-taking port connected to the PSE interface to have other specific proportional relations. For example: when the two power ports of the converter are respectively connected to a PSE interface, if the conversion circuit detects that the power consumption required by the PD is 20W, and the power provided by each PSE interface is 15W, at this time, the conversion circuit You can set the required input power of both power outlets to 10W, or set the required input power of one power outlet to 15W, and set the required input power of the other power outlet to 5W. All reasonable.

It should be noted that when adjusting the input power required by the power intake port connected to the PSE according to the power consumption value required by the PD, different input power distribution ratios can be selected according to different application scenarios, and are not limited to the ones specified in the present invention. provided.

Those skilled in the art can understand that since the PSE can adjust the output power provided by the PSE interface according to the detected input impedance of the load, the conversion circuit in the converter can adjust the output power of the PSE according to the detected power consumption value. The input impedance of the power intake port connected to the interface is used to adjust the input power required by the power intake port, so that the PSE can adjust the power provided by the corresponding PSE interface according to the input impedance of the power intake port. Similarly, the conversion circuit can set the input impedance of each power-taking port connected to the PSE interface to be equal, so that the input power of each power-taking port connected to the PSE interface is equal, or the conversion circuit can set each power-taking port connected to the PSE interface The input impedances of the power intake ports connected to the interfaces are set to have other specific proportional relationships, so that the required input power of each power intake ports connected to the PSE interfaces has the specific proportional relationship.

Of course, the way of adjusting the required input power of the power intake port connected to the PSE according to the power consumption value is not limited to the way provided by the present invention, and other power adjustment ways can also be selected according to actual application scenarios.

S103, after the input power required by the power intake port connected to the PSE interface is successfully adjusted, merge the power obtained by each power intake port;

Since multiple power-taking ports perform power-taking actions, and each power-taking port obtains a specific input power, in order to supply power to the PD through one power supply port, after the required input power of the power-taking port connected to the PSE interface is successfully adjusted , it is necessary to combine the power obtained by each power outlet.

S104. Output the combined power through the power supply port to provide power for the PD.

After combining the power obtained by each power supply port, the combined power can be output through the power supply port to provide power for the PD.

In the embodiment of the present invention, the converter is connected between the PSE and the PD; the conversion circuit in the converter detects the power consumption value required by the power supply port connected to the PD, and adjusts the power consumption value of the power intake port connected to the PSE according to the power consumption value. The required input power; after the input power required by the power intake port connected to the PSE interface is successfully adjusted, the power obtained by the power intake port is combined, and the combined power is output through the power supply port, and then can be realized The PSE supplies power to PDs that require a higher power consumption than the power provided by their ports.

Correspondingly, the present invention also provides a converter, which is suitable for a power-over-Ethernet system, and the power-over-Ethernet system includes: a power supply equipment PSE and a powered device PD; the converter includes: at least two power-taking ports, at least a power supply port and,

It is used to detect the power consumption value required by the power supply port, and adjust the input power required by the power intake port connected to the PSE according to the power consumption value; the input power required by the power intake port connected to the PSE interface After the adjustment is successful, combine the power obtained by the power intake port, output the combined power through the power supply port, and use it as a conversion circuit for supplying power to the PD.

The converter provided by the present invention is arranged between the PSE and the PD, and at least two power-taking ports are respectively connected to a PSE port, and a power supply port can be connected to the PD. When the power consumption required by the PD is higher than the power that the PSE interface can provide, the process of using the converter to realize the effective power supply of the PSE to the PD can be as follows: the conversion circuit of the converter detects the power required by the power supply port connected to the PD The power consumption value, that is, the power consumption value required by the PD; after determining the power consumption value required by the power supply port, adjust the input power required by the power intake port connected to the PSE interface according to the power consumption value, so that The PSE adjusts the output power of the PSE interface according to the power required by the power intake port, so that the PSE outputs the power required by the power intake port connected to the PSE interface; after the input power required by the power intake port connected to the PSE interface is successfully adjusted , the conversion circuit combines the power obtained by each power intake port, and then outputs the combined power through the power supply port, and finally implements power supply for the PD. It can be seen that by using the converter provided by the present invention, the PSE can supply power to the PD whose required power consumption value is higher than the power provided by its port.

It can be understood that when the power consumption required by the PD is not higher than the power provided by the PSE interface, the converter provided by the present invention can also be used. At this time, connect one power intake port to the PSE port, and one power supply port to the PD, and the converter only serves as a transfer function.

Wherein, when the conversion circuit of the converter adjusts the input power required by the power intake ports connected to the PSE according to the power consumption value required by the PD, the input power required by each power intake port connected to the PSE interface can be set as or set the input power required by each power-taking port connected to the PSE interface to have other specific proportional relations. For example: when the two power ports of the converter are respectively connected to a PSE interface, if the conversion circuit detects that the power consumption required by the PD is 20W, and the power provided by each PSE interface is 15W, at this time, the conversion circuit You can set the required input power of both power outlets to 10W, or set the required input power of one power outlet to 15W, and set the required input power of the other power outlet to 5W. All reasonable.

It should be noted that when adjusting the input power required by the power intake port connected to the PSE according to the power consumption value required by the PD, different input power distribution ratios can be selected according to different application scenarios, and are not limited to the ones specified in the present invention. provided.

Those skilled in the art can understand that since the PSE adjusts the output power provided by the PSE interface according to the detected input impedance of the load, the conversion circuit in the converter can adjust the output power of the PSE interface according to the detected power consumption value. The input impedance of the connected power intake port is used to adjust the input power required by the power intake port, so that the PSE can adjust the power provided by the corresponding PSE interface according to the input impedance of the power intake port. Similarly, the conversion circuit can set the input impedance of each power-taking port connected to the PSE interface to be equal, so that the input power of each power-taking port connected to the PSE interface is the same, or the conversion circuit can set the input impedance of each power-taking port connected to the PSE interface The input impedances of the power intake ports connected to the interfaces are set to have other specific proportional relationships, so that the required input power of each power intake ports connected to the PSE interfaces has the specific proportional relationship.

Furthermore, since multiple power-taking ports perform power-taking actions, and each power-taking port obtains a specific input power, in order to supply power to the PD through one power supply port, the power-taking port connected to the PSE interface in the conversion circuit corresponds to The output end of the load is combined and connected to the power supply port, so as to realize the combined processing of the power obtained by the power intake port. Of course, the manner of combining the power obtained by the power outlets is not limited to the manner provided in this embodiment.

The converter provided by the present invention will be introduced below in conjunction with a specific embodiment.

The converter shown in Fig. 3 and Fig. 4 has a first power-taking port Port1, a second power-taking port Port2, a power supply port Port3, and a conversion circuit composed of a power-taking part and a power supply part. The first power intake port Port1 and the second power intake port Port2 are respectively connected to a PES interface of the PSE power supply device, and the power supply port Port3 is connected to the PD power receiving device. The power taking part mainly controls the different levels of the input impedance of the first load PD1 and the second load PD2 through the middle jumping method and the end jumping method, and the input of the first power taking port Port1 and the second power taking port Port2 After the power is combined at the rear end of the first load PD1 and the second load PD2, it is input into the power supply part. The power supply part is provided with a PSE control chip, and the PSE control chip can detect the power consumption value required by the PD powered equipment connected to the power supply port Port3, and adjust the power consumption of the first load PD1 and the second load PD2 respectively according to the power consumption value. Input impedance, in order to achieve the purpose of respectively adjusting the input power required by the first power intake port Port1 and the second power intake port Port2, so that the PSE power supply equipment can increase the required power for the first power intake port Port1 and the second power intake port Port2 respectively. required power.

Wherein, the first power intake port Port1 is a service port, and the second power intake port Port2 is an auxiliary power supply port. That is, the first power-taking port Port1 is connected to the PSE interface through 8 complete wires, so as to transmit both data signals and electrical signals; while the second power-taking port Port2 only uses 4 wires (4 , 5, 7, 8) Transmission of electrical signals. It can be understood that, in practical applications, the first power-taking port Port1 and the second power-taking port Port2 can support FE interfaces and GE interfaces, but the power-taking modes of the ports are different.

Among them, the process of using the converter to realize that the PSE power supply equipment supplies power to the PD powered equipment whose power consumption value is higher than the power provided by its port is as follows:

(1) Connect the two PE ports to the first power intake port Port1 and the second power intake port Port2 respectively, and connect the PD powered device to the power supply port Port3;

(2) In the initial state, the first load PD1 and the second load PD2 are the default input impedance level: level 0;

(3) When the PSE control chip detects the power consumption value required by the PD through the power supply port Port3, it adjusts the power consumption of the first load PD1 and the second load PD2 respectively according to the determined power consumption value and according to a certain power distribution ratio. Input impedance, so that the input power required by the first power-taking port Port1 corresponding to the first load PD1 and the second power-taking port Port2 corresponding to the second load PD2 is not greater than the power provided by the PE interface, and the first power-taking port The sum of the input power required by Port1 and the second power-taking port Port2 is not lower than the power consumption value required by the PD device;

(4) When the PSE control chip detects that both the first load PD1 and the second load PD2 indicate that the power supply is OK, the PSE control chip obtains the combined power, and turns on the MOS switch to supply power to the PD connected to the power supply port Port3. power supply.

Further, when the PSE control chip detects that the PD power receiving device connected to the power supply port Port3 is abnormal, it will actively turn off the MOS switch to protect the PD power receiving device. When the PD power receiving device is normal, the PSE control chip turns on the MOS switch again to supply power to the PD power receiving device.

It should be noted that when the PSE control chip does not supply power to the PD powered device connected to the power supply port Port3, the converter only needs microampere-level power consumption to ensure that the PSE control chip can work normally: The power consumption of the PD powered device connected to Port3 of the power supply port can be classified.

It is understandable that the converter can support two 802.3af interfaces to supply power to an 802.3at standard device; at the same time, by modifying the converter, the two 802.3af interfaces can also be used to supply non-standard interfaces with greater power requirements powered by.

It should be noted that the converter described in this specific embodiment is only used as an example, and should not be construed as a limitation to the solution of the present invention.

Correspondingly, the present invention also provides a power over Ethernet system, including: a power supply equipment PSE and a powered device PD; and a converter:

The converters include:

At least two power outlets, at least one power supply outlet and,

It is used to detect the power consumption value required by the power supply port, and adjust the input power required by the power intake port connected to the PSE according to the power consumption value; the input power required by the power intake port connected to the PSE interface After the adjustment is successful, combine the power obtained by the power intake port, output the combined power through the power supply port, and use it as a conversion circuit for supplying power to the PD.

In the Ethernet power supply system provided by the present invention, the converter is connected between the PSE and the PD; the conversion circuit in the converter detects the power consumption value required by the power supply port connected to the PD, and adjusts the power consumption value connected to the PSE according to the power consumption value. The input power required by the power intake port; after the input power required by the power intake port connected to the PSE interface is successfully adjusted, the power obtained by the power intake port is combined, and the combined power is output through the power supply port power, so that the PSE can supply power to PDs that require higher power consumption than the power provided by their ports.

It is understandable that, since multiple power intake ports perform power intake operations, and each power intake port obtains a specific input power, in order to realize power supply for PD through one power supply port, the power intake port connected to the PSE interface needs to After the input power is adjusted successfully, it is necessary to combine the power obtained by each power outlet. Therefore, the output end of the load corresponding to the power intake port connected to the PSE interface in the conversion circuit can be combined and then connected to the power supply port, so as to realize the combination of the power obtained by each power intake port. Of course, the manner of combining the power obtained by the power outlets is not limited to the manner provided in the embodiment of the present invention.

The foregoing is only a specific embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the present invention. It should be regarded as the protection scope of the present invention.

Claims (6)

1. A power supply method, characterized in that it is applicable to a Power over Ethernet system, and the Power over Ethernet system includes: a power supply equipment PSE, a powered device PD, and at least two power-taking ports, at least one power supply port and at least A converter composed of a conversion circuit, the converter is arranged between the PSE and the PD, and at least two power-taking ports of the converter are respectively connected to a PSE interface, and one power supply port of the converter Connected to the PD; the method includes: The conversion circuit detects the power consumption value required by the power supply port, and adjusts the input power required by the power intake port connected to the PSE according to the power consumption value; After the input power required by the power intake port connected to the PSE interface is successfully adjusted, the power obtained by the power intake port is combined, and the combined power is output through the power supply port to provide power for the PD. ; Wherein, when the conversion circuit adjusts the input power required by the power intake ports connected to the PSE according to the power consumption value, the input power required by each power intake port connected to the PSE interface is set to be equal, or set The input power required by each power-taking port connected to the PSE interface is set to have a specific proportional relationship. 2. The method according to claim 1, wherein the input power required for the power-taking port connected to the PSE is adjusted according to the power consumption value, specifically: The conversion circuit adjusts the input impedance of the power intake port connected to the PSE according to the power consumption value, so as to adjust the required input power of the power intake port connected to the PSE. 3. A converter suitable for use in a Power over Ethernet system, the Power over Ethernet system comprising: a power supply equipment PSE and a powered device PD; characterized in that the converter comprises: at least two power-taking ports, at least a power supply port and, It is used to detect the power consumption value required by the power supply port, and adjust the input power required by the power intake port connected to the PSE according to the power consumption value; the input power required by the power intake port connected to the PSE interface After the adjustment is successful, combine the power obtained by the power intake port, and output the combined power through the power supply port, so as to provide power to the conversion circuit for the PD; Wherein, the converter is arranged between the PSE and the PD, and at least two power-taking ports of the converter are respectively connected to a PSE interface, and one power supply port of the converter is connected to the PD; Wherein, when the conversion circuit adjusts the input power required by the power intake ports connected to the PSE according to the power consumption value, the input power required by each power intake port connected to the PSE interface is set to be equal, or set The input power required by each power-taking port connected to the PSE interface is set to have a specific proportional relationship. 4 . The converter according to claim 3 , characterized in that, in the conversion circuit, the output terminal of the power-taking port connected to the PSE interface corresponds to the load and is connected to the power supply port after being combined. 5. A power-over-Ethernet system, comprising: power supply equipment PSE and powered equipment PD; characterized in that, it also includes: a converter: The converters include: At least two power outlets, at least one power supply port, and at least one power supply port are used to detect the power consumption value required by the power supply port, and adjust the input power required by the power consumption port connected to the PSE according to the power consumption value; After the input power required by the power intake port connected to the PSE interface is successfully adjusted, the power obtained by the power intake port is combined and processed, and the combined power is output through the power supply port to provide power for the PD. Conversion circuit ; Wherein, the converter is arranged between the PSE and the PD, and at least two power-taking ports of the converter are respectively connected to a PSE interface, and one power supply port of the converter is connected to the PD; Wherein, when the conversion circuit adjusts the input power required by the power intake ports connected to the PSE according to the power consumption value, the input power required by each power intake port connected to the PSE interface is set to be equal, or set The input power required by each power-taking port connected to the PSE interface is set to have a specific proportional relationship. 6 . The system according to claim 5 , wherein the output end of the load corresponding to the power-taking port connected to the PSE interface in the conversion circuit is combined and connected to the power supply port. 7 .