PoE extender with input port and output port sharing lightning protection device

Abstract

The utility model discloses a PoE extender with an input port and an output port sharing a lightning protection device, and belongs to the technical field of electronic and electrical equipment. The PoE extender comprises a main body circuit, an anode surge protection device and a cathode surge protection device, the main body circuit comprises a rectifying device; one end of the anode surge protection device is connected with an output anode of the rectifying device, and the other end of the anode surge protection device is grounded; and one end of the cathode surge protection device is connected with the output cathode of the rectifying device, and the other end of the cathode surge protection device is grounded. According to the utility model, a group of positive and negative lightning protection devices are arranged at the output end of the rectification device, so that a discharge path for surge energy coupled from the input end and the output end can be formed, and an effective protection effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic and electrical equipment, and particularly relates to a PoE extender with a shared lightning protection device for input and output ports. Background Art

[0002] A PoE extender extends PoE signals from a source device (such as a PoE switch or injector) over longer distances, typically extending the transmission distance from the standard 100 meters to 200 meters or longer. The basic principle is to receive power and data from the PoE source, re-amplify the signal within the extender, and transmit it to the end device (such as an IP camera or wireless access point). Because PoE extenders are suitable for devices that need to be powered away from the PoE source, especially in large buildings, outdoor environments, or when crossing obstacles, these environments are often harsh and prone to lightning strikes. Therefore, PoE extenders require lightning surge protection.

[0003] A PoE extender typically has at least one PD power input port and one PSE power output port. Existing surge protection designs for PoE extenders add lightning protection devices near the input and output ports to absorb lightning surge currents. Because the input and output ports share the same power circuit, adding separate lightning protection devices is redundant and results in unnecessary cost increases. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems in the above-mentioned related technologies to a certain extent.

[0005] To this end, the purpose of the present invention is to provide a PoE extender with a shared lightning protection device for both input and output ports. By only providing a set of positive and negative lightning protection devices at the output end of the rectifier device, a discharge path for surge energy coupled in from both the input and output ends can be formed, thereby playing an effective protective role.

[0006] In order to solve the above technical problems, the utility model is achieved as follows:

[0007] The embodiment of the utility model provides a PoE extender with a shared lightning protection device for input and output ports, the PoE extender comprising a main circuit, a positive surge protection device and a negative surge protection device;

[0008] The main circuit includes a rectifier device;

[0009] One end of the positive surge protection device is connected to the positive electrode output of the rectifier device, and the other end is grounded;

[0010] One end of the negative electrode surge protection device is connected to the negative electrode output of the rectifier device, and the other end is grounded.

[0011] In addition, the PoE extender with a shared lightning protection device for both input and output ports according to the present invention may also have the following additional technical features:

[0012] In some of the embodiments, the PoE extender further includes a housing;

[0013] The main circuit also includes a PD power receiving input port, an input PD controller and a first capacitor;

[0014] The PD power receiving input port is provided at one end of the housing; the rectifier device, the input PD controller and the first capacitor are sequentially provided inside the housing, and the rectifier device is connected to the PD power receiving input port.

[0015] In some embodiments, a bypass diode is provided at the input PD controller, and the bypass diode is connected in parallel with the input PD controller.

[0016] In some of the embodiments, the PoE extender further includes a housing;

[0017] The main circuit also includes a PD power receiving input port, an input PD controller, a first capacitor, an output PSE controller, several PSE power supply output ports and several output port diodes;

[0018] The PD power receiving input port is provided at one end of the housing, and the PSE power supply output port is provided at the other end of the housing; the rectifier device, the input PD controller, the first capacitor, the output PSE controller, and the output port diode are sequentially provided inside the housing, and the rectifier device is connected to the PD power receiving input port;

[0019] The PSE power supply output ports and the output port diodes are arranged in a one-to-one correspondence; the number of the PSE power supply output ports is the same as the number of control paths of the output PSE controller.

[0020] In some embodiments, a first bypass diode is provided at the input PD controller; a second bypass diode is provided at the output PSE controller;

[0021] The first bypass diode is connected in parallel with the input PD controller;

[0022] The second bypass diode is connected in parallel with the output PSE controller.

[0023] In some of the embodiments, the PoE extender further includes a housing;

[0024] The main circuit also includes a PD power receiving input port, a first capacitor, an output PSE controller, several PSE power supply output ports and several output port diodes;

[0025] The PD power receiving input port is provided at one end of the housing, and the PSE power supply output port is provided at the other end of the housing; the rectifier device, the first capacitor, the output PSE controller, and the output port diode are sequentially provided inside the housing, and the rectifier device is connected to the PD power receiving input port;

[0026] The PSE power supply output ports and the output port diodes are arranged in a one-to-one correspondence; the number of the PSE power supply output ports is the same as the number of control paths of the output PSE controller.

[0027] In some embodiments, the PD power input port is a direct current input port.

[0028] In some embodiments, the PSE has one or two power output ports.

[0029] In some embodiments, the housing is grounded, and the positive surge protection device and the negative surge protection device are grounded through the housing.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] In the embodiment of the present invention, the provided PoE extender, which shares a lightning protection device for both input and output ports, only requires adding a set of lightning protection devices to the positive and negative poles of the PD input rectifier to provide protection against lightning strikes of different polarities at the input and output ends. In the design of products with the same level of lightning protection performance, the adoption of the solution of the present invention offers significant advantages in both product miniaturization and overall cost reduction.

[0032] In an embodiment of the present invention, a PoE extender with a shared lightning protection device for both input and output ports is provided. Lightning protection devices are added to the positive and negative output electrodes of the rectifier device on the PD input port side. This allows for simultaneous response to lightning strikes of different polarities at the PD input port and the PSE output port, dissipating surge energy and protecting the PoE extender.

[0033] In the embodiments of the present invention, the provided PoE extender, which shares a lightning protection device for both input and output ports, can improve the surge protection level of the entire PoE extender by increasing the current specifications of the rectifier and output port diodes and by providing bypass diodes at the input and output port controllers. This allows for better protection against different levels of lightning strikes.

[0034] In the embodiment of the present invention, the provided PoE extender with a shared lightning protection device for input and output ports can adapt to PoE extenders of various structures, including a single PSE output port, multiple PSE output ports, a DC input port, and a structure without PSE, and has a wide range of applications.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic structural diagram of a PoE extender with a shared lightning protection device for input and output ports disclosed in one embodiment of the present utility model;

[0037] Figure 2 This is a schematic structural diagram of a PoE extender with a shared lightning protection device for input and output ports according to another embodiment of the present invention;

[0038] Figure 3 This is a schematic structural diagram of a PoE extender with a shared lightning protection device for input and output ports according to another embodiment of the present invention;

[0039] Figure 4 This is a schematic structural diagram of a PoE extender with a shared lightning protection device for input and output ports according to another embodiment of the present invention;

[0040] Figure 5 This is a structural diagram of a PoE extender with a shared lightning protection device for input and output ports disclosed in another embodiment of the present utility model.

[0041] Description of reference numerals:

[0042] 001 - PD power input port; 002 - first PSE power output port; 003 - rectifier; 004 - PD controller input; 005 - PSE controller output; 006 - first diode; 007 - first capacitor; 008 - positive surge protection device; 009 - negative surge protection device; 010 - housing; 011 - second PSE power output port; 012 - second diode;

[0043] 104 - a first bypass diode; 105 - a second bypass diode. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] The embodiments of the present invention are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0046] See also Figure 1 As shown, some embodiments of the present invention provide a PoE extender with a shared lightning protection device for both input and output ports. The PoE extender includes a housing 010, a PD power input port 001 and a first PSE power output port 002, located at opposite ends of the housing 010. A rectifier device 003 and the extender's main circuit are located between the PD power input port 001 and the first PSE power output port 002. The extender's main circuit includes an input PD controller 004, a first capacitor 007, an output PSE controller 005, and a first diode 006, arranged in that order. The two ends of the rectifier device 003 are connected to the PD power input port 001 and the input PD controller 004, respectively. The housing 010 is grounded. The rectifier device 003 is used to rectify the DC current, generating positive and negative polarities to power subsequent components in the extender's main circuit. In this embodiment, a surge protection device is provided at the positive and negative electrodes of the rectified circuit, respectively: a positive surge protection device 008 and a negative surge protection device 009. One end of the positive surge protection device 008 is connected to the positive electrode, and the other end is grounded or connected to the housing 010. One end of the negative surge protection device 009 is connected to the negative electrode, and the other end is grounded or connected to the housing 010. Positive surge protection device 008 and negative surge protection device 009 can be implemented using existing lightning protection devices, such as varistors, voltage suppression diodes, or surge protectors.

[0047] In the above embodiment, the PD power input port 001 inputs DC power. Since the POE power supply stipulates that the PSE side can be any two polarities, MDI and MDI-X; therefore, the PD is equipped with a rectifier bridge to adapt to power supplies of different polarities.

[0048] In the above embodiment, one end of the positive surge protection device 008 is connected to the positive output of the rectifier device 003, and the other end is connected to the housing 010, thereby providing a common circuit for the input and output ports to discharge positive voltage surges to ground. One end of the negative surge protection device 009 is connected to the negative output of the rectifier device 003, and the other end is connected to the housing 010, thereby providing a common circuit for the input and output ports to discharge negative voltage surges to ground. When a surge occurs, the two surge protection devices can provide protection and protect the circuit. The basic operating principle is as follows:

[0049] When a positive voltage surge to ground couples energy to the PoE extender through the input port, the surge energy at the PD's power input port 001 is concentrated at the positive output of the rectifier device through the rectifier device 003. The negative surge protection device 009 provides a low-impedance discharge path for the surge. Therefore, the surge energy concentrated at the positive output of the rectifier device is discharged through the negative surge protection device 009 to the housing 010 and ultimately to the ground.

[0050] When a negative voltage surge to ground couples energy to the PoE extender through the input port, the surge energy at the PD's power input port 001 is concentrated at the rectifier's output negative terminal via the rectifier 003. The positive surge protection device 008 provides a low-impedance discharge path for the surge. Therefore, the surge energy concentrated at the rectifier's output negative terminal is discharged through the positive surge protection device 008 to the housing 010 and ultimately to the ground.

[0051] When a positive voltage surge to ground couples energy to the PoE extender through the output port, the first PSE power output port 002 is directly connected to the positive output electrode of the rectifier device 003 or connected to the positive output electrode of the rectifier device 003 through the first diode 006. The surge energy can be directly coupled to the positive output electrode of the rectifier device 003 or converged to the positive output electrode of the rectifier device 003 through the first diode 006. The negative electrode surge protection device 009 provides a low-impedance discharge path for the surge. Therefore, the surge energy that has been concentrated at the positive output electrode of the rectifier device is discharged to the housing 010 through the negative electrode surge protection device 009 and finally directed to the ground.

[0052] When there is a negative voltage to the ground and energy is coupled to the PoE extender through the output port, part of the surge energy of the first PSE power output port 002 is coupled to the negative electrode of the first capacitor 007 through the first capacitor 007. The first capacitor 007 is a large-capacity capacitor. Part of the energy is coupled to the negative electrode of the first capacitor 007 through the output PSE controller 005. Then, the surge energy at the negative electrode of the large-capacity capacitor is coupled to the negative output of the rectifier device through the input PD controller 004. The positive surge protection device 008 provides a low-impedance discharge path for the surge. Therefore, the surge energy that has accumulated at the positive output of the rectifier device is discharged to the casing through the positive surge protection device 008 surge protection device and finally directed to the ground.

[0053] In the description of the negative pressure surge to ground, the surge energy flows in the opposite direction of the current.

[0054] In other embodiments of the present invention, since there is a huge surge current in the surge convergence path, the current carrying capacity of the devices in the surge path should be improved to avoid device damage, or a bypass design should be added to protect vulnerable devices. This embodiment is improved by increasing the current specification of the rectifier device, increasing the forward current specification of the first diode, and / or providing bypass diodes at the input PD controller 004 and the output PSE controller 005. Figure 2 As shown, due to the increase in device current specifications, there is no significant impact on the structure diagram. Figure 2 Only the structure for setting the bypass diode is shown. A first bypass diode 104 is provided between the positive input terminal and the output terminal of the input PD controller 004. The input terminal of the first bypass diode 104 is connected to the positive input terminal of the input PD controller 004, and the output terminal of the first bypass diode 104 is connected to the output terminal of the input PD controller 004. A second bypass diode 105 is provided between the positive input terminal and the output terminal of the output PSE controller 005. The input terminal of the second bypass diode 105 is connected to the positive input terminal of the output PSE controller 005, and the output terminal of the second bypass diode 105 is connected to the output terminal of the output PSE controller 005.

[0055] In some embodiments of the present invention, the output of the extender is multiple ports. Figure 3As shown, the output PSE controller 005 differs from the output PSE controller 005 in the previous embodiment. This output PSE controller 005 has dual control functions. One control function is connected to the first output port, namely the first PSE power output port 002, and the other control function is connected to the second output port, namely the second PSE power output port 011. Both PSE power output ports are equipped with a parallel diode, namely the first diode 006 and the second diode 012 in the figure. The positive and negative poles of the diodes are connected to the positive and negative poles of the PSE power output ports, respectively, forming a parallel structure.

[0056] In other embodiments of the present invention, please refer to Figure 4 As shown, it is the same as the previous Figure 1 The difference between the corresponding embodiment and the power receiving input port is that it inputs DC power, and the input PD controller 004 used to control the input port is removed. This embodiment also provides a surge protection device at the positive and negative output terminals of the rectifier device 003, respectively. The positive surge protection device 008 and the negative surge protection device 009 are used to provide a low-impedance discharge path for positive and negative polarity surge energy coupled from the PSE power output port to the PoE extender, thereby protecting the PoE extender.

[0057] In other embodiments of the present invention, compared to Figure 1 The embodiment shown in the figure cancels the PSE function, that is, it becomes a common terminal PD device, and its structure is shown in FIG. Figure 5 As shown in the figure, the surge protection device installed after the rectifier device 003 can provide lightning protection for the PD device. It mainly provides a low-impedance discharge path for positive and negative polarity surge energy coupled into the PD's power input port 001. Compared with the existing technology of installing differential line lightning protection before the rectifier tube, it can also reduce the number of lightning protection devices used.

[0058] It should be noted that the specific connection method between the components or devices in the PoE extender can also refer to the existing technology, which is not limited in this embodiment and will not be described in detail here. In addition, the parts not described in detail in this utility model are well known to those skilled in the art.

[0059] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A PoE extender with a shared lightning protection device for input and output ports, characterized in that: The PoE extender includes a main circuit, a positive surge protection device and a negative surge protection device; The main circuit includes a rectifier device; One end of the positive surge protection device is connected to the positive electrode output of the rectifier device, and the other end is grounded; One end of the negative electrode surge protection device is connected to the negative electrode output of the rectifier device, and the other end is grounded.

2. The PoE extender with a shared lightning protection device for input and output ports according to claim 1, characterized in that: Also includes the housing; The main circuit also includes a PD power receiving input port, an input PD controller and a first capacitor; The PD power receiving input port is provided at one end of the housing; the rectifier device, the input PD controller and the first capacitor are sequentially provided inside the housing, and the rectifier device is connected to the PD power receiving input port.

3. The PoE extender with a shared lightning protection device for input and output ports according to claim 1, characterized in that: Also includes the housing; The main circuit also includes a PD power receiving input port, an input PD controller, a first capacitor, an output PSE controller, several PSE power supply output ports and several output port diodes; The PD power receiving input port is provided at one end of the housing, and the PSE power supply output port is provided at the other end of the housing; the rectifier device, the input PD controller, the first capacitor, the output PSE controller, and the output port diode are sequentially provided inside the housing, and the rectifier device is connected to the PD power receiving input port; The PSE power supply output ports and the output port diodes are arranged in a one-to-one correspondence; the number of the PSE power supply output ports is the same as the number of control paths of the output PSE controller.

4. The PoE extender with a shared lightning protection device for input and output ports according to claim 1, characterized in that: Also includes the housing; The main circuit also includes a PD power receiving input port, a first capacitor, an output PSE controller, several PSE power supply output ports and several output port diodes; The PD power receiving input port is provided at one end of the housing, and the PSE power supply output port is provided at the other end of the housing; the rectifier device, the first capacitor, the output PSE controller, and the output port diode are sequentially provided inside the housing, and the rectifier device is connected to the PD power receiving input port; The PSE power supply output ports and the output port diodes are arranged in a one-to-one correspondence; the number of the PSE power supply output ports is the same as the number of control paths of the output PSE controller.

5. The PoE extender with a shared lightning protection device for input and output ports according to claim 2, characterized in that: A bypass diode is provided at the input PD controller, and the bypass diode is connected in parallel with the input PD controller.

6. The PoE extender with a shared lightning protection device for input and output ports according to claim 3, characterized in that: The input PD controller is provided with a first bypass diode; the output PSE controller is provided with a second bypass diode; The first bypass diode is connected in parallel with the input PD controller; The second bypass diode is connected in parallel with the output PSE controller.

7. The PoE extender with a shared lightning protection device for input and output ports according to any one of claims 2 to 4, characterized in that: The PD power receiving input port is a direct current input port.

8. The PoE extender with a shared lightning protection device for input and output ports according to any one of claims 3-4, characterized in that: The PSE has one or two power supply output ports.

9. The PoE extender with a shared lightning protection device for input and output ports according to claim 4, characterized in that: The housing is grounded, and the positive surge protection device and the negative surge protection device are grounded through the housing.

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