Network transformer and network signal transmission device

Abstract

The utility model discloses a network transformer and network signal transmission device. Network transformer includes: at least one voltage transformation structure, voltage transformation structure includes first magnetic ring, first winding, second magnetic ring and second winding, first winding is wound on first magnetic ring, and second winding is wound on second magnetic ring at least, second winding includes the first wire, second wire and ground winding of stranding, the first wire is as first tap, and the tail end of second wire is as second tap, and the first end of ground winding is grounded, and the tail end of first wire, the first end of second wire and the tail end of ground winding are in suspension. The utility model discloses technical scheme can improve the insertion loss and loop loss of voltage transformation structure, improve the effect that voltage transformation structure shields electromagnetic interference, make network transformer can work in higher frequency band.

Description

Technical Field

[0001] This utility model relates to the field of network signal transmission technology, and in particular to a network transformer and a network signal transmission device. Background Technology

[0002] Currently, network transformers are required in network products such as switches, routers, network interface cards (NICs), high-definition video transmission systems, and power boards. Existing network transformers do not meet performance standards. Utility Model Content

[0003] This invention provides a network transformer and a network signal transmission device to improve the insertion loss and loop loss of the transformer structure, enabling the network transformer to operate at a higher frequency band; and to filter out external interference signals, thereby improving the electromagnetic interference shielding effect of the transformer structure and thus improving the performance of the network transformer.

[0004] According to one aspect of the present invention, a network transformer is provided, comprising: at least one transformer structure; The transformer structure includes a first magnetic ring, a first winding, a second magnetic ring, and a second winding; the first winding is wound on the first magnetic ring, and the second winding is wound on at least the second magnetic ring; The second winding includes a first winding, a second winding, and a grounding winding; The first end of the first winding is used as the first tap, the last end of the second winding is used as the second tap, the first end of the grounding winding is grounded, and the last end of the first winding, the first end of the second winding, and the last end of the grounding winding are suspended.

[0005] Optionally, the first winding includes a twisted third winding, a fourth winding, a fifth winding, and a sixth winding; The beginning ends of the third winding and the fourth winding serve as the third tap; The tail ends of the fifth winding and the sixth winding serve as the fourth tap; The tail end of the third winding, the tail end of the fourth winding, the beginning end of the fifth winding, and the beginning end of the sixth winding serve as the fifth tap and are grounded; The first and second windings both extend onto the first magnetic ring and are twisted together with the third, fourth, fifth, and sixth windings.

[0006] Optionally, the length of the stranded wire connecting the first winding, the second winding, and the grounding winding between the first magnetic ring and the second magnetic ring is 1-3 mm.

[0007] Optionally, the network transformer further includes: a housing, in which a plurality of the transformer structures are disposed; The housing includes a first sidewall and a second sidewall disposed opposite to each other. The first sidewall is provided with a plurality of first pins, and the second sidewall is provided with a plurality of second pins. The first tap, the second tap, and the ground tap are respectively connected to different first pins, and the third tap, the fourth tap, and the fifth tap are respectively connected to different second pins.

[0008] Optionally, the first pin includes a first inner pin and a first outer pin. The first inner pin is disposed on the inner wall of the first sidewall, and the first outer pin is disposed on the outer wall of the first sidewall. The first inner pin and the first outer pin are connected to each other. The first tap, the second tap, and the ground tap are respectively connected to different first inner pins. The second pin includes a second inner pin and a second outer pin. The second inner pin is disposed on the inner wall of the second sidewall, and the second outer pin is disposed on the outer wall of the second sidewall. The second inner pin and the second outer pin are connected to each other. The third tap, the fourth tap and the fifth tap are respectively connected to different second inner pins.

[0009] Optionally, the network transformer further includes a shielding layer, and the housing further includes an opening, the opening being disposed opposite to the bottom of the housing, the shielding layer being connected to the side wall of the housing and covering the opening; the shielding layer is used to shield electromagnetic interference signals outside the housing.

[0010] Optionally, the axial direction of the first magnetic ring is perpendicular to the axial direction of the second magnetic ring.

[0011] Optionally, the network transformer includes a plurality of transformer structures arranged along a first direction. In two adjacent transformer structures, the axial direction of one first magnetic ring is perpendicular to the bottom of the housing, and the axial direction of the other first magnetic ring is perpendicular to the first sidewall; wherein, the first direction is the direction of the long side of the first sidewall.

[0012] Optionally, the permeability of the second magnetic ring is 4000-5000 μI.

[0013] According to another aspect of the present invention, a network signal transmission device is provided, comprising the network transformer described in any of the first aspects.

[0014] The technical solution provided by this embodiment of the utility model involves a first winding wound around a first magnetic ring as the primary side of the transformer structure, and a second winding wound around a second magnetic ring as the secondary side of the transformer structure. The second winding on the second magnetic ring can be formed by spirally twisting a grounding winding, a first winding, and a second winding together. The beginning end of the first winding is located on the second magnetic ring and can serve as the first tap of the transformer structure. The end end of the second winding is located on the second magnetic ring and can serve as the second tap of the secondary side of the transformer structure. The first tap and the second tap serve as the output terminals of the secondary side of the transformer structure and are connected to the load. When the beginning end of the grounding winding is located on the second magnetic ring and serves as the grounding terminal of the secondary side of the transformer structure, connected to the grounding terminal of the load, the insertion loss and loop loss of the transformer structure can be improved, allowing the network transformer to operate at a higher frequency band. Grounding the grounding winding can filter out external interference signals, improve the electromagnetic interference shielding effect of the transformer structure, and thus improve the performance of the network transformer.

[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the transformer structure of a network transformer provided by this utility model; Figure 2 A schematic diagram of the structure of the first winding of a network transformer provided by this utility model; Figure 3 A schematic diagram of the structure of the first winding and the first magnetic ring of a network transformer provided by this utility model; Figure 4 A top view of the housing of a network transformer provided by this utility model; Figure 5 A three-dimensional structural diagram of the housing of a network transformer provided by this utility model; Figure 6 A schematic diagram of the structure of a network transformer provided by this utility model; Figure 7 A three-dimensional structural schematic diagram of a shielding layer provided for utility model; Figure 8A side view of a shielding layer provided for utility model. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] Figure 1 A schematic diagram of the transformer structure of a network transformer provided by this utility model. See also... Figure 1 The network transformer includes at least one transformer structure 10; the transformer structure 10 includes a first magnetic ring T1, a first winding 100, a second magnetic ring T2, and a second winding 200; the first winding 100 is wound on the first magnetic ring T1, and the second winding 200 is wound on at least the second magnetic ring T2; the second winding T2 includes a stranded first winding L1, a second winding L2, and a grounding winding G; the beginning end of the first winding L1 serves as a first tap Y1, the end of the second winding L2 serves as a second tap Y2, the beginning end of the grounding winding G is grounded, and the end of the first winding L1, the beginning end of the second winding L2, and the end of the grounding winding G are suspended.

[0021] Specifically, the network transformer can be composed of multiple transformer structures 10. The first magnetic ring T1 and the second magnetic ring T2 in the transformer structure 10 can be annular magnetic cores. The first winding 100 can include multiple turns, and this multi-turn first winding 100 can be wound around the first magnetic ring T1 as part of the primary winding of the transformer; the second winding 200 can also include multiple turns, and this multi-turn second winding 200 can be wound around the second magnetic ring T2 as the secondary winding of the transformer. The first winding L1, the second winding L2, and the grounding winding G can be helically twisted together and then wound around the second magnetic ring T2 as the second winding 200. One end of the twisted second winding 200 is placed on the second magnetic ring T2, serving as the grounding terminal of the transformer's secondary side, and the other end of the second winding 200 is a floating end O. The floating end O is not connected to any electrical components. For example, the beginning of the first winding L1, the end of the second winding L2, and the beginning of the grounding winding G can be located on the second magnetic ring T2; the beginning of the first winding L1 can serve as the first tap Y1 of the transformer secondary side, the end of the second winding L2 can serve as the second tap Y2 of the transformer secondary side, and the beginning of the grounding winding G can serve as the grounding terminal of the transformer secondary side. The first tap Y1 and the second tap Y2 can serve as the output terminals of the transformer secondary side connected to the load, and the beginning of the grounding winding G can serve as the grounding terminal of the transformer secondary side.

[0022] The technical solution provided in this embodiment of the utility model involves the first end of the first winding being disposed on the second magnetic ring, serving as the first tap of the transformer structure. The tail end of the second winding is disposed on the second magnetic ring, serving as the second tap of the secondary side of the transformer structure. The first and second taps are connected to the load as the output terminals of the secondary side of the transformer structure. When the first end of the grounding winding is disposed on the second magnetic ring as the grounding terminal of the secondary side of the transformer structure and connected to the grounding terminal of the load, the insertion loss and loop loss of the transformer structure can be improved, allowing the network transformer to operate at a higher frequency band. Grounding the grounding winding can filter out external interference signals, improve the electromagnetic interference shielding effect of the transformer structure, and thus improve the performance of the network transformer.

[0023] Optionally, Figure 2 This is a schematic diagram of the structure of the first winding of a network transformer provided by this utility model. Figure 3 This is a schematic diagram of the first winding and first magnetic ring of a network transformer provided by this utility model. Based on the above embodiment, see [reference needed]. Figure 1 , Figure 2 and Figure 3The first winding 100 includes a twisted third winding L3, a fourth winding L4, a fifth winding L5, and a sixth winding L6; the beginning of the third winding L3 and the beginning of the fourth winding L4 serve as the third tap X1; the end of the fifth winding L5 and the end of the sixth winding L6 serve as the fourth tap X2; the end of the third winding L3, the end of the fourth winding L4, the beginning of the fifth winding L5, and the beginning of the sixth winding L6 serve as the fifth tap X3 and are grounded; the first winding L1 and the second winding L2 both extend to the first magnetic ring T1 and are twisted together with the third winding L3, the fourth winding L4, the fifth winding L5, and the sixth winding L6.

[0024] Specifically, the tail end of the first winding L1 and the head end of the second winding L2 extend and are twisted together with the third winding L3, the fourth winding L4, the fifth winding L5, and the sixth winding L6 to form the first winding 100. This can be understood as the first winding 100 being formed by the spiral twisting of six windings: the first winding L1, the second winding L2, the third winding L3, the fourth winding L4, the fifth winding L5, and the sixth winding L6. The first winding L1, the second winding L2, the third winding L3, the fourth winding L4, the fifth winding L5, and the sixth winding L6 can be polyurethane self-adhesive nylon enameled wire with an outer diameter of 0.08 mm. Figure 2 and Figure 3 As shown, during twisting, the first winding L1, the third winding L3, and the fourth winding L4 are first spirally twisted together to form the first twisted wire, and the second winding L2, the fifth winding L5, and the sixth winding L6 are spirally twisted together to form the second twisted wire. Then, the first twisted wire and the second twisted wire, a total of six windings, are threaded together into the first magnetic ring T1 for winding. The first magnetic ring T1 after winding is as follows: Figure 3As shown. Then, the six windings are separated to create taps. The beginning L3a of the third winding L3 and the beginning L4a of the fourth winding L4 can be separated to form the third tap X1 of the primary side of the transformer structure 10; the end L5b of the fifth winding L5 and the end L6b of the sixth winding L6 can be separated to form the fourth tap X2 of the primary side of the transformer structure 10; the end L3b of the third winding L3, the end L4b of the fourth winding L4, the beginning L5a of the fifth winding L5, and the beginning L6a of the sixth winding L6 can be separated to form the fifth tap X3 of the primary side of the transformer structure 10. The fifth tap X3 can be used for grounding. The beginning L1a of the first winding L1 and the end L2b of the second winding L2 can be separated and twisted together with the beginning of the grounding winding G, then wound around the second magnetic ring T2 to form the second winding 200. The remaining tail end L1b of the first winding L1 and the beginning end L2a of the second winding L2 can be twisted together with the tail end of the grounding winding G and placed on the first magnetic ring T1 as a suspended end O, thus forming a complete transformer structure 10. The first winding L1, the second winding L2, and the grounding winding G on the second magnetic ring T2 are wound around the first magnetic ring T1 and are not electrically connected to the three windings L3, the fourth winding L4, the fifth winding L5, and the sixth winding L6 on the first magnetic ring T1, thus forming the transformer structure 10 based on the principle of electromagnetic induction. The third tap X1 on the first magnetic ring T1 can serve as the positive input terminal of the primary side of the transformer structure 10, the fourth tap X2 can serve as the negative input terminal of the primary side of the transformer structure 10, and the fifth tap X5 can serve as the ground terminal of the primary side of the transformer structure 10. The first tap Y1 on the second magnetic ring T2 can serve as the positive output terminal of the secondary side of the transformer structure 10, and the second tap can serve as the negative output terminal of the secondary side of the transformer structure 10. Compared with the traditional four-wire winding structure, the six-wire winding structure provided by this invention can improve the signal transmission speed and operating frequency, and expand the application scenarios of network transformers.

[0025] Optionally, based on the above embodiments, see below. Figure 1 The length of the stranded wire connecting the first winding L1, the second winding L2, and the grounding winding G between the first magnetic ring T1 and the second magnetic ring T2 is 1-3 mm.

[0026] Specifically, when the beginning end L1a of the first winding L1 and the end L2b of the second winding L2 are twisted with the beginning end of the grounding winding G, they can be twisted at a twist pitch of 16-18 strands / inch. Then, a 1-3 mm connection wire is left between the first magnetic ring T1 and the second magnetic ring T2. If the connection wire is greater than 3 mm, insertion loss and return loss will increase, thus affecting the transmission effect of high-frequency data. If the connection wire is less than 1 mm, the short distance will affect the arrangement of the first and second magnetic rings. When the second winding 200 wraps around the second magnetic ring T2, the center angle of the fan-shaped area around the second magnetic ring T2 can be 120 degrees.

[0027] Optionally, Figure 4 This is a top view of the housing of a network transformer provided by this utility model. Figure 5 This is a three-dimensional structural diagram of the housing of a network transformer provided by this utility model. Figure 6 A schematic diagram of a network transformer provided by this utility model. Based on the above embodiments, see... Figure 1 , Figure 4 , Figure 5 and Figure 6 The network transformer also includes: a housing 20, with multiple transformer structures 10 disposed inside the housing; the housing 20 includes a first sidewall 21 and a second sidewall 22 disposed opposite to each other, the first sidewall 21 is provided with multiple first pins A, the second sidewall is provided with multiple second pins B, a first tap X1, a second tap X2 and a ground tap GND are respectively connected to different first pins A, and a third tap Y1, a fourth tap Y2 and a fifth tap Y3 are respectively connected to different second pins B.

[0028] Specifically, multiple transformer structures 10 can be arranged in an array inside the housing 20 and electrically connected to the first pin A and the second pin B. The housing 20 can be a cuboid structure, with its sides and bottom surface surrounding the multiple transformer structures 10, and its top open. The housing 20 can be made of plastic, and it can contain filler to provide stable support for the transformer structures 10 and protect them from damage. The first sidewall 21 and the second sidewall 22 can be the two long sides of the housing 20. The first sidewall 21 has multiple first pins A arranged in an array, and the second sidewall 22 has multiple second pins B arranged in an array. The first tap Y1, the second tap Y2, and the ground tap GND on the second magnetic ring T2 of the transformer structure 10 can be connected to different first pins A, respectively; the third tap X1, the fourth tap X2, and the fifth tap X3 on the first magnetic ring T1 of the transformer structure 10 are connected to different second pins B, respectively. The first pin A is located on the first side wall 21 of the housing, and the second pin B is located on the second side wall 22 of the housing, which facilitates the array connection of the first magnetic ring T1 and the second magnetic ring T2 of the transformer structure 10.

[0029] Optionally, based on the above embodiments, see below. Figure 4 and Figure 6 The first pin A includes a first inner pin An and a first outer pin Am. The first inner pin An is located on the inner wall of the first sidewall 21, and the first outer pin Am is located on the outer wall of the first sidewall 21. The first inner pin An and the first outer pin Am are connected accordingly. The first tap Y1, the second tap Y2, and the ground tap GND are connected to different first inner pins An respectively. The second pin B includes a second inner pin Bn and a second outer pin Bm. The second inner pin Bn is located on the inner wall of the second sidewall 22, and the second outer pin Bm is located on the outer wall of the second sidewall. The second inner pin Bn and the second outer pin Bm are connected accordingly. The third tap X1, the fourth tap X2, and the fifth tap X3 are connected to different second inner pins Bn respectively.

[0030] Specifically, during manufacturing, the first pin A and the second pin B can be arranged in an array, and then injection molded to form the housing 20. This results in the first pin A being separated by the first sidewall 21 of the housing 20 into a first inner pin An and a first outer pin Am, and the second pin B being separated by the second sidewall 22 of the housing 20 into a second inner pin Bn and a second outer pin Bm. The first inner pin An can be connected as an internal pin to the first tap Y1, the second tap Y2, and the ground tap GND on the second magnetic ring T2. The second inner pin Bn can be connected as an internal pin to the third tap X1, the fourth tap X2, and the fifth tap X3 on the first magnetic ring T1. The six taps of each transformer structure 10 can be connected to the first inner pin An and the second inner pin Bn respectively, and multiple transformer structures 10 are correspondingly connected and arranged within the housing 20 to form a network transformer. For example, as shown... Figure 6 As shown, the network transformer housing 20 contains four transformer structures 10, 12 first pins A, and 12 second pins B. The connection is illustrated using the first transformer 10 on the left as an example. The first tap Y1 on the second magnetic ring T2 of transformer structure 10 can be electrically connected to the first inner pin An2, the second tap Y2 can be electrically connected to the first inner pin An3, and the ground tap GND can be electrically connected to the first inner pin An1. The third connecting tap X1 on the first magnetic ring T1 of transformer structure 10 can be electrically connected to the second inner pin Bn2, the fourth connecting tap X2 can be electrically connected to the second inner pin Bn3, and the fifth connecting tap X3 can be electrically connected to the second inner pin Bn1. The first outer pin Am and the second outer pin Bm can be used as external pin pads for soldering to the circuit board, thereby firmly soldering the network transformer onto the circuit board and preventing vibration from affecting the internal transformer structure 10 of the network transformer.

[0031] Optionally, Figure 7 A three-dimensional structural diagram of a shielding layer is provided for the utility model. Figure 8 This is a side view structural diagram of a shielding layer provided by a utility model. Based on the above embodiments, see... Figure 6 , Figure 7 and Figure 8 The network transformer also includes a shielding layer 30, and the housing 20 also includes an opening, which is disposed opposite to the bottom of the housing 20. The shielding layer 30 is connected to the opening of the housing 20 and covers the opening; the shielding layer 30 is used to shield electromagnetic interference signals outside the housing.

[0032] Specifically, the shielding layer 30 can be a metal cover. The shielding layer 30 can be disposed on the opposite side of the bottom of the housing 20, covering the opening to completely enclose the network transformer. The shielding layer 30 can reduce and shield interference signals emitted by external electronic components, filter out noise, and effectively improve the network transformer's resistance to electromagnetic interference signals, thereby ensuring that signal and flow statistics meet specifications during signal transmission. The shielding layer 30 can also be detachably connected to the side wall of the housing 20, facilitating disassembly and maintenance of the network transformer.

[0033] Alternatively, based on the above embodiments, see... Figure 6 The axial direction of the first magnetic ring T1 is perpendicular to the axial direction of the second magnetic ring T2. The network transformer includes multiple transformer structures 10 arranged along a first direction. In two adjacent transformer structures 10, the axial direction of one first magnetic ring T1 is perpendicular to the bottom of the housing 20, and the axial direction of the other first magnetic ring T1 is perpendicular to the first sidewall 21; wherein, the first direction is the direction of the long side of the first sidewall 21. Specifically, when the transformer structure 10 is disposed inside the housing 20, the first magnetic ring T1 and the second magnetic ring T2 can be arranged in an array with their axes perpendicular to each other. That is, the central axis passing through the center of the first magnetic ring T1 is perpendicular to the central axis passing through the center of the second magnetic ring T2. The fan-shaped area of ​​the second winding 200 surrounding the second magnetic ring T2 can be arranged facing the opening of the housing 20. For example, as shown... Figure 6 As shown, the second magnetic ring T2 of each transformer structure 10 can be arranged such that the axis of the second magnetic ring T2 is perpendicular to the first sidewall 21 and the second sidewall 22. Correspondingly, when the axis of the first magnetic ring T1 is perpendicular to the axis of the second magnetic ring T2, there are two possible arrangements. One is that the axis of the first magnetic ring T1 is perpendicular to the horizontal plane where the opening of the housing 20 is located, and the other is that the axis of the first magnetic ring T1 is parallel to the horizontal plane where the opening of the housing 20 is located. The arrangement of the first magnetic ring T1 in two adjacent transformer structures 10 can be different.

[0034] Alternatively, based on the above embodiments, see... Figure 1 The permeability of the second magnetic ring T2 is 4000-5000ui.

[0035] Specifically, both the first magnetic ring T1 and the second magnetic ring T2 can be made of manganese-zinc ferrite cores. The permeability of both the first magnetic ring T1 and the second magnetic ring T2 can be 4000-5000 μI. Using a manganese-zinc core with a permeability of 4000-5000 μI for the second magnetic ring T2 can increase its toroidal inductance, suppress noise, and thus reduce the number of turns of the first winding 100 and the second winding 200 on the first magnetic ring T1 and the second magnetic ring T2. This reduces copper losses, improves the insertion loss and loop loss of the network transformer, allowing the network transformer to operate at higher frequencies and increase transmission distance. For example, the tail end L1b of the first winding L1, the beginning end L2a of the second winding L2, the third winding L3, the fourth winding L4, the fifth winding L5, and the sixth winding L6 can be inserted into the first magnetic ring T1 and wrapped around it 8 times; the beginning end L1a of the first winding L1 and the tail end L2b of the second winding L2 can be twisted together with the beginning end of the grounding winding G and then wrapped around the second magnetic ring T2 6 times.

[0036] This utility model also provides a network signal transmission device, including the network transformer provided in any of the above embodiments, which has the same beneficial effects as any of the above embodiments, and will not be described again here. The network signal transmission device can be an electronic device that needs to transmit network signals, such as a switch, router, network card, high-definition video transmission device, or power board.

[0037] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0038] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A network transformer, characterized in that, include: At least one transformer structure; The transformer structure includes a first magnetic ring, a first winding, a second magnetic ring, and a second winding; the first winding is wound on the first magnetic ring, and the second winding is wound on at least the second magnetic ring; The second winding includes a first winding, a second winding, and a grounding winding; The first end of the first winding is used as the first tap, the last end of the second winding is used as the second tap, the first end of the grounding winding is grounded, and the last end of the first winding, the first end of the second winding, and the last end of the grounding winding are suspended.

2. The network transformer according to claim 1, characterized in that, The first winding includes a third, fourth, fifth, and sixth winding twisted together; The beginning ends of the third winding and the fourth winding serve as the third tap; The tail ends of the fifth winding and the sixth winding serve as the fourth tap; The tail end of the third winding, the tail end of the fourth winding, the beginning end of the fifth winding, and the beginning end of the sixth winding serve as the fifth tap and are grounded; The first and second windings both extend onto the first magnetic ring and are twisted together with the third, fourth, fifth, and sixth windings.

3. The network transformer according to claim 2, characterized in that, The length of the stranded wire connecting the first winding, the second winding, and the grounding winding between the first magnetic ring and the second magnetic ring is 1-3 mm.

4. The network transformer according to claim 2 or 3, characterized in that, Also includes: A housing, wherein multiple transformer structures are disposed within the housing; The housing includes a first sidewall and a second sidewall disposed opposite to each other. The first sidewall is provided with a plurality of first pins, and the second sidewall is provided with a plurality of second pins. The first tap, the second tap, and the ground tap are respectively connected to different first pins, and the third tap, the fourth tap, and the fifth tap are respectively connected to different second pins.

5. The network transformer according to claim 4, characterized in that, The first pin includes a first inner pin and a first outer pin. The first inner pin is disposed on the inner wall of the first sidewall, and the first outer pin is disposed on the outer wall of the first sidewall. The first inner pin and the first outer pin are connected to each other. The first tap, the second tap, and the ground tap are respectively connected to different first inner pins. The second pin includes a second inner pin and a second outer pin. The second inner pin is disposed on the inner wall of the second sidewall, and the second outer pin is disposed on the outer wall of the second sidewall. The second inner pin and the second outer pin are connected to each other. The third tap, the fourth tap and the fifth tap are respectively connected to different second inner pins.

6. The network transformer according to claim 5, characterized in that, Also includes: The shielding layer, the housing further includes an opening, the opening being disposed opposite to the bottom of the housing, the shielding layer being connected to the side wall of the housing and covering the opening; The shielding layer is used to shield electromagnetic interference signals outside the housing.

7. The network transformer according to claim 1, characterized in that, The axial direction of the first magnetic ring is perpendicular to the axial direction of the second magnetic ring.

8. The network transformer according to claim 4, characterized in that, The network transformer includes multiple transformer structures arranged along a first direction. In two adjacent transformer structures, the axial direction of the first magnetic ring of one is perpendicular to the bottom of the housing, and the axial direction of the first magnetic ring of the other is perpendicular to the first sidewall. The first direction is the direction of the long side of the first sidewall.

9. The network transformer according to claim 1, characterized in that, The permeability of the second magnetic ring is 4000-5000 μI.

10. A network signal transmission device, characterized in that, include: The network transformer according to any one of claims 1-9.

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