A power supply and communication system for an LED luminaire

Abstract

The application discloses a power supply and communication system of an LED lamp, which comprises a power supply device and an LED lamp, wherein the power supply device is connected with the LED lamp through a network cable; the maximum transmission voltage of each network cable is greater than the maximum transmission voltage of a POE power supply line; an MCU control module is arranged in the LED lamp; the power supply device is used for outputting an external power supply to the LED lamp, supplying power for the LED lamp, and sending corresponding network signals to the MCU control module, so that the power supply device and the LED lamp realize network communication; the MCU control module is used for controlling the input external power supply to supply power for the LED lamp, receiving the network signals sent by the power supply device, and realizing network communication with the power supply device. The application can improve the maximum input power of the LED lamp and meet the illumination demand of higher illuminance.

Description

Technical Field

[0001] This invention relates to the field of network cable power supply and communication technology, and in particular to a power supply and communication system for LED lighting fixtures. Background Technology

[0002] Currently, cable-based power supply and communication are used in many fields, with Power over Ethernet (PoE) being a common method. PoE is widely used in areas such as surveillance and lighting, providing stable DC power to IP-based terminal devices without modifying existing Cat.5 Ethernet cabling infrastructure. This ensures that these terminal devices can communicate normally with other external communication devices. Because terminal devices can access stable power through PoE circuits, PoE has become a major power supply technology standard for communication equipment.

[0003] However, PoE power supply equipment is relatively expensive, and according to PoE power supply standards, the power provided by a single port of a PoE power supply device when powering terminal devices does not exceed 100W. When using PoE power supply equipment to power LED lights, the illuminance provided by the LED lights is limited due to the low port power provided by the PoE power supply equipment, which cannot meet the lighting needs for higher illuminance and causes inconvenience to the use of LED lights. Summary of the Invention

[0004] This invention provides a power supply and communication system for LED lamps to solve the technical problem of low port power provided by PoE power supply equipment.

[0005] To address the aforementioned technical problems, embodiments of the present invention provide a power supply and communication system for LED lamps, comprising: a power supply device and an LED lamp;

[0006] The power supply equipment is connected to the LED lamps via a network cable; wherein the maximum transmission voltage of each network cable is greater than the maximum transmission voltage of the POE power supply line;

[0007] The LED lamp is equipped with an MCU control module;

[0008] The power supply device is used to output external power to the LED lamp to power the LED lamp, and send the corresponding network signal to the MCU control module so that the power supply device and the LED lamp can achieve network communication;

[0009] The MCU control module is used to control the input external power supply to power the LED lamp, and to receive network signals sent by the power supply equipment and communicate with the power supply equipment via the network.

[0010] As a preferred embodiment, the power receiving port of the LED lamp is equipped with a first voltage and current detection module;

[0011] The first voltage and current detection module is used to detect whether the input external power supply is overloaded or overloaded before powering the LED lamp.

[0012] The MCU control module is also used to monitor the first voltage and current detection module. When the external power supply is detected to have a current overload or voltage overload, the module controls the MOS transistor of the LED lamp to cut off the input of the external power supply to the power receiving port.

[0013] As a preferred embodiment, the power receiving port of the LED lamp is further provided with a power receiving control module;

[0014] The power receiving control module includes: a first network transformer and a network chip;

[0015] The first network transformer is used to perform primary coil conversion on the external power supply before the power supply equipment outputs the external power supply to the first voltage and current detection module, and then outputs the converted external power supply to the first voltage and current detection module; before the power supply equipment sends the corresponding network signal to the MCU control module, it performs primary coil conversion and secondary coil conversion on the network signal respectively, and then sends the converted network signal to the network chip.

[0016] The network chip is used to forward the network signal to the MCU control module.

[0017] As a preferred embodiment, the power supply equipment is connected to the LED lamp via a network cable, including:

[0018] One power supply port of the power supply device is connected to one power receiving port of several LED lamps in sequence via a network cable, or two power supply ports of the power supply device are connected to two power receiving ports of an LED lamp respectively via two network cables.

[0019] As a preferred embodiment, the LED lamp is provided with two ports;

[0020] When one power supply port of the power supply device is connected to one power receiving port of several LED lamps in sequence through a network cable, the two ports of the LED lamps are the power receiving port and the power supply port, respectively.

[0021] The power receiving port is used to receive external power and network signals output by the power supply equipment;

[0022] The power supply port is used to output the external power supply and network signal to the power receiving port of the next LED lamp.

[0023] As a preferred embodiment, when the two power supply ports of the power supply equipment are connected to the two power receiving ports of an LED lamp through two network cables respectively, both ports of the LED lamp are power receiving ports.

[0024] The power receiving port is used to receive external power and network signals output by the power supply equipment.

[0025] As a preferred embodiment, when one power supply port of the power supply equipment is connected to one power receiving port of several LED lamps in sequence via a network cable, the power supply port of the LED lamps is equipped with a second voltage and current detection module.

[0026] The second voltage and current detection module is used to detect whether the output external power supply is overloaded or overloaded before outputting the external power supply and network signal to the power receiving port of the next LED lamp.

[0027] The MCU control module is also used to monitor the second voltage and current detection module. When the external power supply is detected to have a current overload or voltage overload, the module controls the MOS transistor of the LED lamp to cut off the output of the external power supply in the power supply port.

[0028] As a preferred embodiment, the power supply port of the LED lamp is also equipped with a power supply control module;

[0029] The power supply control module includes: a second network transformer;

[0030] The second network transformer is used to perform primary coil conversion on the external power supply before the LED lamp outputs the external power supply to the next LED lamp, and then output the converted external power supply to the power receiving port of the next LED lamp; before the LED lamp outputs the network signal to the next LED lamp, it performs primary coil conversion and secondary coil conversion on the network signal respectively, and then sends the converted network signal to the power receiving port of the next LED lamp.

[0031] As a preferred embodiment, both the first network transformer and the second network transformer are provided with primary coils;

[0032] The first network transformer performs primary coil conversion on the external power supply, including:

[0033] The external power supply is input from both ends of the primary coil, and after the external power supply is converted by the primary coil, it is output from the center tap of the primary coil.

[0034] The second network transformer performs primary coil conversion on the external power supply, including:

[0035] The external power supply is input from the center tap of the primary coil, and after being converted by the primary coil, it is output from both ends of the primary coil.

[0036] As a preferred embodiment, the first network transformer and the second network transformer are further provided with secondary coils;

[0037] The process of performing primary coil conversion and secondary coil conversion on the network signal includes:

[0038] The network signal is input from the primary coil, performs primary coil conversion on the external power supply, generates a corresponding magnetic flux, and passes through the secondary coil, so that the secondary coil performs secondary coil conversion on the external power supply and outputs a network signal of a preset level.

[0039] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0040] This invention provides a power supply and communication system for LED lamps, comprising: a power supply device and an LED lamp; the power supply device is connected to the LED lamp via a network cable; wherein the maximum transmission voltage of each network cable is greater than the maximum transmission voltage of the PoE power supply line; the LED lamp is equipped with an MCU control module; the power supply device is used to output external power to the LED lamp to power the LED lamp, and to send corresponding network signals to the MCU control module to enable network communication between the power supply device and the LED lamp; the MCU control module is used to control the input external power supply to power the LED lamp, and to receive the network signals sent by the power supply device to communicate with the power supply device via the network.

[0041] In the power supply and communication system of the LED lamps of this invention, the power supply equipment and the LED lamps are connected via a network cable. Unlike the transmission voltage limitation of the power supply network cable in the PoE power supply system, this invention can select a network cable with a maximum transmission voltage greater than the maximum transmission voltage of the PoE power supply line to supply power to the LED lamps. This makes the maximum input power of the LED lamps greater than the maximum port power that the PoE power supply system can provide, thereby increasing the maximum input power of the LED lamps and thus increasing the maximum illumination of the LED lamps, which can meet the lighting requirements of higher illumination levels. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the power supply and communication system for an LED lamp according to an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the first connection method between power supply equipment and LED lights;

[0044] Figure 3 This is a CAD drawing of the power supply for LED lights using the first connection method;

[0045] Figure 4 This is a schematic diagram of the second connection method between the power supply equipment and the LED lights;

[0046] Figure 5 This is a CAD drawing of the power supply for LED lights using the second connection method. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0050] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0053] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0054] Example 1

[0055] Please refer to Figure 1 This is a schematic diagram of the power supply and communication system for an LED lamp according to an embodiment of the present invention, including: power supply equipment and LED lamp;

[0056] The power supply equipment is connected to the LED lamps via a network cable; wherein the maximum transmission voltage of each network cable is greater than the maximum transmission voltage of the POE power supply line;

[0057] The LED lamp is equipped with an MCU control module;

[0058] The power supply device is used to output external power to the LED lamp to power the LED lamp, and send the corresponding network signal to the MCU control module so that the power supply device and the LED lamp can achieve network communication;

[0059] The MCU control module is used to control the input external power supply to power the LED lamp, and to receive network signals sent by the power supply equipment and communicate with the power supply equipment via the network.

[0060] Preferably, the power receiving port of the LED lamp is provided with a first voltage and current detection module; the first voltage and current detection module is used to detect whether the input external power supply has a current overload or voltage overload before supplying power to the LED lamp; the MCU control module is also used to monitor the first voltage and current detection module, and when the external power supply is detected to have a current overload or voltage overload, control the MOS transistor of the LED lamp to cut off the input of the external power supply to the power receiving port.

[0061] Preferably, the power receiving port of the LED lamp is further provided with a power receiving control module; the power receiving control module includes: a first network transformer and a network chip; the first network transformer is used to perform primary coil conversion on the external power supply before the power supply equipment outputs the external power supply to the first voltage and current detection module, and then outputs the converted external power supply to the first voltage and current detection module; before the power supply equipment sends the corresponding network signal to the MCU control module, it performs primary coil conversion and secondary coil conversion on the network signal respectively, and then sends the converted network signal to the network chip; the network chip is used to forward the network signal to the MCU control module.

[0062] like Figure 1 As shown, the power supply and communication system for the LED lamp of the present invention includes: a power supply device and an LED lamp; the power supply device is connected to the LED lamp via a network cable. The LED lamp contains an MCU control module, and its power receiving port is equipped with a first voltage and current detection module and a power receiving control module. The power receiving control module contains a first network transformer and a network chip.

[0063] When the power supply device supplies power to the LED lamp and communicates with the LED lamp via the network, the LED lamp is connected to the power supply device. The power supply device first inputs external power to the first network transformer at the power receiving port of the LED lamp. After conversion by the primary coil of the first network transformer, the external power is output from the center tap of the first network transformer to the first current and voltage detection circuit. At the same time, the MCU control module monitors the voltage and current detection module in real time. If a current and voltage overload is detected in the voltage and current detection module, the MOSFET of the LED lamp is controlled to cut off the external power input at the power receiving port. If no current and voltage overload is detected, power is supplied to the LED lamp.

[0064] The network signal sent by the power supply equipment is input from the outside to the first network transformer of the LED lamp's power receiving port. After being converted by the primary coil, it is then converted into an Ethernet signal by the secondary coil and sent to the network chip. The network chip forwards the signal to the MCU so that the power supply equipment and the LED lamp can achieve network communication.

[0065] Preferably, the power supply device is connected to the LED lamps via a network cable, including: one power supply port of the power supply device is connected to a power receiving port of a plurality of LED lamps in sequence via a network cable, or two power supply ports of the power supply device are connected to two power receiving ports of an LED lamp respectively via two network cables.

[0066] Preferably, the LED lamp has two ports; when one power supply port of the power supply device is connected to one power receiving port of several LED lamps in sequence through a network cable, the two ports of the LED lamp are respectively the power receiving port and the power supply port; the power receiving port is used to receive the external power and network signal output by the power supply device; the power supply port is used to output the external power and network signal to the power receiving port of the next LED lamp.

[0067] Preferably, when one power supply port of the power supply device is connected to a power receiving port of several LED lamps in sequence via a network cable, the power supply port of the LED lamp is equipped with a second voltage and current detection module; the second voltage and current detection module is used to detect whether the output external power supply has a current overload or voltage overload before outputting the external power supply and network signal to the power receiving port of the next LED lamp; the MCU control module is also used to monitor the second voltage and current detection module, and when the external power supply is detected to have a current overload or voltage overload, control the MOS transistor of the LED lamp to cut off the output of the external power supply in the power supply port.

[0068] Preferably, the power supply port of the LED lamp is further provided with a power supply control module; the power supply control module includes: a second network transformer; the second network transformer is used to perform primary coil conversion on the external power supply before the LED lamp outputs the external power supply to the next LED lamp, and then output the converted external power supply to the power receiving port of the next LED lamp; before the LED lamp outputs the network signal to the next LED lamp, it performs primary coil conversion and secondary coil conversion on the network signal respectively, and then sends the converted network signal to the power receiving port of the next LED lamp.

[0069] In the power supply and communication system of the LED lamp described in this invention, the power supply equipment and the LED lamp have the following two connection methods:

[0070] (1) Please refer to Figure 2 This diagram illustrates a first connection method between the power supply equipment and the LED lights. In this first connection method, one power supply port of the power supply equipment is sequentially connected to a power receiving port of several LED lights via a network cable.

[0071] The LED luminaire has two RJ45 ports. In this connection method, one RJ45 port serves as a power receiving port and the other as a power supply port. The power receiving port receives power from the power supply equipment to power the LED luminaire and handle network communication; the power supply port is cascaded to the next LED luminaire, outputting the external power input from the power receiving port to the next LED luminaire and sending network signals to the next luminaire.

[0072] In the first connection method, a second voltage and current detection module and a power supply control module are also provided at the power supply port of the LED lamp, and a second network transformer is provided in the power supply control module.

[0073] Before the LED lamp outputs the external power supply to the next LED lamp, a second voltage and current detection module is first input to the power supply port. This module detects whether the external power supply experiences current or voltage overload. If an overload occurs, the MCU control module controls the LED lamp's MOSFET to cut off the external power supply output from the power supply port. If no overload is detected, the external power supply undergoes primary conversion via the primary coil of the second network transformer before being output through the power supply port. Simultaneously, the MCU control module forwards a network signal to the second network transformer at the power supply port. This network signal is converted by the secondary coil and then by the primary coil before being sent to the next LED lamp.

[0074] Please refer to Figure 3 This is a CAD drawing showing the power supply for LED lights using the first connection method. In this method, the LED lights can use network cables of CAT6 or CAT7 or higher specifications, using RJ45 ports, and the cable wiring sequence follows the T-568B standard. All four pairs of wires on a network cable are used for power supply, with the wiring sequence numbered 1-8. Wires 1 and 2 are power negative, 3 and 4 are power positive, 5 and 6 are power positive, and 7 and 8 are power negative. Wires 1, 2, 3, and 4 also handle network signal transmission.

[0075] For power transmission, the LED lights have two RJ45 ports that can be cascaded: one input port and one output port. The input port can be connected to the output port of another LED light or the output port of a power supply device. The maximum input voltage of the input port is 56V, and the maximum output voltage of the output port is 56V. The maximum input power of the light fixture is 150W, and the maximum output power is 150W, both 50W higher than PoE. Each of the eight wires in the power supply cable has a maximum current carrying capacity of 1A.

[0076] For network signal transmission, the network signal is input from the RJ45 input port of the LED lamp and forwarded to the RJ45 output port of the LED lamp by the network chip. Current is input from the input port and output from the output port, thereby realizing the cascading of LED lamps.

[0077] Preferably, when the two power supply ports of the power supply device are connected to the two power receiving ports of an LED lamp via two network cables, both ports of the LED lamp are power receiving ports; the power receiving ports are used to receive external power and network signals output by the power supply device.

[0078] (2) Please refer to Figure 4 This diagram illustrates a second connection method between the power supply equipment and the LED lamp. In this second connection method, the two power supply ports of the power supply equipment are connected to the two power receiving ports of an LED lamp via two network cables.

[0079] In the second connection method, the LED light has two RJ45 ports. Both RJ45 ports serve as power receiving ports, receiving power input, and do not have the ability to supply power to other LED lights. Both power receiving ports can engage in network communication, but only one port can communicate at a time; the network chip automatically selects the communication port.

[0080] Both power receiving ports of the LED lamp are connected to a power supply device. The power supply device simultaneously inputs power to both power receiving ports of the LED lamp. Each power receiving port of the LED lamp has two first network transformers. After the input power enters the first network transformer of the power receiving port, it is converted by the primary coil of the first network transformer and output from the center tap of the first network transformer. The power from the center taps of the two first network transformers is combined, and then passes through the first voltage and current detection module of the LED lamp's power supply port. If an overload of current or voltage is detected, the MCU control module in the LED lamp controls the MOSFET of the LED lamp to cut off the power receiving circuit. If no overload is detected, the external power supply supplies power to the LED lamp. When transmitting network signals, the network signal is input from the pre-selected power receiving port, converted by the primary coil of the first network transformer, and then converted by the secondary coil before being output to the network chip of the LED lamp.

[0081] Please refer to Figure 5 This is a CAD drawing showing the power supply for LED lights using the second connection method. In this method, the LED lights use CAT6 or CAT7 or higher specification network cables and RJ45 ports, with the cable wiring sequence following the T-568B standard. Two network cables, totaling eight pairs, are used for power supply. The wiring sequence of one network cable is 1-8: 1 and 2 are power negative, 3 and 4 are power positive, 5 and 6 are power positive, and 7 and 8 are power negative. Pairs 1, 2, 3, and 4 also handle network signal transmission.

[0082] For power transmission, the LED lamp has two RJ45 ports, both of which are input terminals. Both ports are powered simultaneously, and the internal circuit balances the two power supplies and combines them into one power supply to power the LED lamp. The maximum input voltage of each port is 56V, and the maximum input power is 150W. The maximum input power of the LED is 300W. Due to the superposition of the power of the two input terminals, the power of the lamp under this connection method can be three times that of PoE.

[0083] For network signal transmission, both RJ45 ports of the LED light fixture can be used for network communication, and the network chip automatically selects one of the ports as the communication port.

[0084] Preferably, both the first network transformer and the second network transformer are provided with primary coils; the first network transformer performs primary coil conversion on the external power supply, including: inputting the external power supply from both ends of the primary coil, and outputting the external power supply from the center tap of the primary coil after primary coil conversion; the second network transformer performs primary coil conversion on the external power supply, including: inputting the external power supply from the center tap of the primary coil, and outputting the external power supply from both ends of the primary coil after primary coil conversion.

[0085] Preferably, the first network transformer and the second network transformer are further provided with secondary coils; the primary coil conversion and secondary coil conversion of the network signal respectively include: inputting the network signal from the primary coil, performing primary coil conversion on the external power supply, generating a corresponding magnetic flux that passes through the secondary coil, so that the secondary coil performs secondary coil conversion on the external power supply and outputs a network signal of a preset level.

[0086] When the network transformer performs primary coil conversion on the external power supply, the primary coil conversion process is as follows:

[0087] At the power supply port, the primary coil's center tap receives power. The voltage across both ends is adjusted according to the number of turns in the windings on both sides, resulting in an output voltage. The sum of the currents at both ends equals the current at the center tap. At the receiving port, the primary coil receives voltage across its terminals and outputs voltage from the center tap. The sum of the currents at both ends equals the current at the center tap. Through this primary coil conversion, the voltage conversion ratio of the external power supply can be adjusted to meet various voltage requirements.

[0088] In addition, when the network transformer performs primary coil conversion and secondary coil conversion on the network signal, the primary coil conversion is to adjust the voltage conversion ratio of the power supply, while the secondary coil conversion is to convert the network signal level to a level suitable for the network chip, so as to realize the conversion between different signal levels and impedances.

[0089] The network signal generates magnetic flux through the primary coil, which then passes through the secondary coil. The secondary coil outputs a voltage level suitable for the network PHY chip. Power is supplied through the primary coil; at the power supply end, it is input from the center tap of the primary coil and output from both ends. At the power receiving end, it is input from both ends of the primary coil and output from the center tap. Throughout this process, the voltage at the center tap and both ends of the primary coil are the same.

[0090] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A power supply and communication system for an LED lighting fixture, characterized in that, include: Power supply equipment and LED lighting fixtures; The power supply equipment is connected to the LED lamps via a network cable; wherein the maximum transmission voltage of each network cable is greater than the maximum transmission voltage of the POE power supply line; The LED lamp is equipped with an MCU control module; The power supply device is used to output external power to the LED lamp to power the LED lamp, and send the corresponding network signal to the MCU control module so that the power supply device and the LED lamp can achieve network communication; The MCU control module is used to control the input external power supply to power the LED lamp, and to receive network signals sent by the power supply equipment and communicate with the power supply equipment via the network. The power receiving port of the LED lamp is equipped with a first voltage and current detection module; The first voltage and current detection module is used to detect whether the input external power supply is overloaded or overloaded before powering the LED lamp. The MCU control module is also used to monitor the first voltage and current detection module. When the external power supply is detected to have a current overload or voltage overload, the module controls the MOS transistor of the LED lamp to cut off the input of the external power supply to the power receiving port. The power receiving port of the LED lamp is also equipped with a power receiving control module; The power receiving control module includes: a first network transformer and a network chip; The first network transformer is used to perform primary coil conversion on the external power supply before the power supply equipment outputs the external power supply to the first voltage and current detection module, and then outputs the converted external power supply to the first voltage and current detection module; before the power supply equipment sends the corresponding network signal to the MCU control module, it performs primary coil conversion and secondary coil conversion on the network signal respectively, and then sends the converted network signal to the network chip. The network chip is used to forward the network signal to the MCU control module.

2. The power supply and communication system for the LED lamp as described in claim 1, characterized in that, The power supply equipment is connected to the LED light fixture via a network cable, including: One power supply port of the power supply device is connected to a power receiving port of several LED lamps in sequence via a network cable, or two power supply ports of the power supply device are connected to two power receiving ports of an LED lamp respectively via two network cables.

3. The power supply and communication system for the LED lamp as described in claim 2, characterized in that, The LED lamp is provided with two ports; When one power supply port of the power supply device is connected to one power receiving port of several LED lamps in sequence through a network cable, the two ports of the LED lamps are the power receiving port and the power supply port, respectively. The power receiving port is used to receive external power and network signals output by the power supply equipment; The power supply port is used to output the external power supply and network signal to the power receiving port of the next LED lamp.

4. The power supply and communication system for the LED lamp as described in claim 3, characterized in that, When the two power supply ports of the power supply equipment are connected to the two power receiving ports of an LED lamp through two network cables, both ports of the LED lamp are power receiving ports. The power receiving port is used to receive external power and network signals output by the power supply equipment.

5. The power supply and communication system for the LED lamp as described in claim 3, characterized in that, When a power supply port of the power supply equipment is connected to a power receiving port of several LED lamps in sequence via a network cable, the power supply port of the LED lamps is equipped with a second voltage and current detection module. The second voltage and current detection module is used to detect whether the output external power supply is overloaded or overloaded before outputting the external power supply and network signal to the power receiving port of the next LED lamp. The MCU control module is also used to monitor the second voltage and current detection module. When the external power supply is detected to have a current overload or voltage overload, the module controls the MOS transistor of the LED lamp to cut off the output of the external power supply in the power supply port.

6. The power supply and communication system for the LED lamp as described in claim 5, characterized in that, The power supply port of the LED lamp is also equipped with a power supply control module; The power supply control module includes: a second network transformer; The second network transformer is used to perform primary coil conversion on the external power supply before the LED lamp outputs the external power supply to the next LED lamp, and then output the converted external power supply to the power receiving port of the next LED lamp; before the LED lamp outputs the network signal to the next LED lamp, it performs primary coil conversion and secondary coil conversion on the network signal respectively, and then sends the converted network signal to the power receiving port of the next LED lamp.

7. The power supply and communication system for the LED lamp as described in claim 6, characterized in that, Both the first network transformer and the second network transformer are equipped with primary coils; The first network transformer performs primary coil conversion on the external power supply, including: The external power supply is input from both ends of the primary coil, and after the external power supply is converted by the primary coil, it is output from the center tap of the primary coil. The second network transformer performs primary coil conversion on the external power supply, including: The external power supply is input from the center tap of the primary coil, and after being converted by the primary coil, it is output from both ends of the primary coil.

8. The power supply and communication system for the LED lamp as described in claim 7, characterized in that, The first network transformer and the second network transformer are also provided with secondary coils; The process of performing primary coil conversion and secondary coil conversion on the network signal includes: The network signal is input from the primary coil, performs primary coil conversion on the external power supply, generates a corresponding magnetic flux, and passes through the secondary coil, so that the secondary coil performs secondary coil conversion on the external power supply and outputs a network signal of a preset level.

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