Network transformer and connector

Abstract

The application relates to a network transformer and a connector, the network transformer comprising a main magnetic ring, a primary coil and a secondary coil, the primary coil comprising a primary triplex wire, the primary triplex wire comprising a first wire, a second wire and a third wire which are twisted together, the secondary coil comprising a secondary triplex wire, the secondary triplex wire comprising a fourth wire, a fifth wire and a sixth wire which are twisted together, and further comprising a seventh wire, the end wire head of the first wire, the start wire head of the fifth wire and the end wire head of the seventh wire being twisted together to form a first center tap of the primary coil, the end wire head of the second wire and the end wire head of the fourth wire being twisted together to form a first double twisted wire, the start wire head of the third wire and the start wire head of the sixth wire being twisted together to form a second double twisted wire, and the first double twisted wire and the second double twisted wire being twisted together to form a second center tap of the secondary coil. The technical scheme disclosed by the application can solve the problem that the existing network transformer winding structure cannot meet the high-speed network transmission requirement.

Description

Technical Field

[0001] This application relates to the field of electronic components, and more particularly to a network transformer and connector. Background Technology

[0002] Network transformers are commonly used components in electronic devices, playing a crucial role in suppressing interference and improving signal integrity. Existing network transformers often employ winding processes such as "2-wire + 2-wire parallel winding" or "4-wire + 4-wire parallel winding." The "2-wire + 2-wire" structure is prone to winding asymmetry due to manufacturing deviations, leading to magnetic saturation and signal imbalance. While the "4-wire + 4-wire" structure can improve some performance, it increases distributed capacitance, affecting high-frequency characteristics. Furthermore, it suffers from complex manufacturing processes and larger size, impacting signal integrity and transmission reliability, thus failing to meet the requirements of current high-speed network transmission. Utility Model Content

[0003] This application provides a network transformer and connector to solve the problem that the existing network transformer's winding structure cannot meet the requirements of high-speed network transmission.

[0004] In a first aspect, this application provides a network transformer, comprising:

[0005] Main magnetic ring;

[0006] A primary coil, disposed on the main magnetic ring, comprises primary twisted wires wound at intervals around the main magnetic ring, the primary twisted wires comprising a first conductor, a second conductor, and a third conductor twisted together; and

[0007] A secondary coil is disposed on the main magnetic ring. The secondary coil and the primary coil are arranged symmetrically about the main magnetic ring. The secondary coil includes secondary twisted wires wound at intervals on the main magnetic ring. The secondary twisted wires include a fourth wire, a fifth wire, and a sixth wire twisted together.

[0008] The network transformer further includes a seventh conductor. The first conductor, the second conductor, the third conductor, the fourth conductor, the fifth conductor, the sixth conductor, and the seventh conductor all include a beginning wire end and an end wire end. The end wire end of the first conductor, the beginning wire end of the fifth conductor, and the end wire end of the seventh conductor are twisted together to form the first center tap of the primary coil.

[0009] The end of the second conductor is twisted with the end of the fourth conductor to form a first twisted pair, and the beginning of the third conductor is twisted with the beginning of the sixth conductor to form a second twisted pair. The first twisted pair and the second twisted pair are twisted together to form the second center tap of the secondary coil.

[0010] In some embodiments, the beginning of the second conductor and the beginning of the fourth conductor form a first-stage lead, and the end of the third conductor and the end of the sixth conductor are twisted together to form a second-stage lead.

[0011] In some embodiments, the twist rate of both the primary twisted cable and the secondary twisted cable is 16-20 strands / inch.

[0012] In some embodiments, the length of the first center tap is 5-6 mm, and the solder length of the first center tap is 1-2 mm.

[0013] In some embodiments, the distance L1 between the twisting start point of the first center tap and the outer wall of the main magnetic ring satisfies the following relationship: 0 < L1 ≤ 1 mm.

[0014] In some embodiments, the network transformer includes:

[0015] A first common-mode magnetic ring is arranged at a distance from the main magnetic ring; and

[0016] A first common-mode coil is disposed on the first common-mode magnetic ring, and the first common-mode coil includes a common-mode twisted wire wound at intervals on the first common-mode magnetic ring;

[0017] The first conductor, the fifth conductor, and the seventh conductor are twisted together to form the common-mode twisted cable, and the beginning end of the first conductor, the end end of the fifth conductor, and the beginning end of the seventh conductor are separate.

[0018] In some embodiments, the distance L2 between the main magnetic ring and the first common-mode magnetic ring satisfies the following relationship: 0 < L2 ≤ 3 mm.

[0019] In some embodiments, the twist rate of the common-mode twisted cable is 16-20 strands / inch.

[0020] In some embodiments, the network transformer includes a second common-mode magnetic ring and a second common-mode coil, wherein the second common-mode magnetic ring is arranged at intervals from the main magnetic ring and the first common-mode magnetic ring; wherein the first stage lead and the second stage lead are wound parallel to each other on the second common-mode magnetic ring to form the second common-mode coil, and the exit ends of the first stage lead and the second stage lead are separate from each other.

[0021] Secondly, this application provides a connector, comprising:

[0022] shell;

[0023] Circuit board, disposed within the housing; and

[0024] As described above, the network transformer is mounted on the circuit board.

[0025] The technical solutions provided in this application have the following advantages compared with the prior art:

[0026] The network transformer provided in this application embodiment forms transformer T1 by symmetrically arranging primary and secondary coils about the main magnetic ring. This results in a uniform electromagnetic field distribution, reduces electromagnetic interference between coils, improves the transformer's anti-interference capability, and also helps improve the transformer's transmission efficiency and reduce energy loss. Compared to the existing 2+2 wire structure, the three-wire structure used in this application can form a more balanced electromagnetic field distribution, improve high-frequency signal integrity, and has stronger anti-interference capability. Furthermore, it is smaller in size and has a simpler winding process than the 4+4 wire structure. In addition, the introduction of a seventh conductor achieves triple shielding of the first center tap, and the use of a twisted-pair composite structure reduces the contact resistance of the second center tap, resulting in more accurate impedance matching. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0030] Figure 1 A circuit diagram of a network transformer provided in an embodiment of this application;

[0031] Figure 2 A schematic diagram of the winding of the primary coil and the secondary coil provided in the embodiments of this application;

[0032] Figure 3 The twisting sequence diagrams of the primary twisted-twin cable and the secondary twisted-twin cable provided in the embodiments of this application;

[0033] Figure 4 A circuit diagram of a network transformer provided in another embodiment of this application;

[0034] Figure 5 for Figure 4 A schematic diagram of the network transformer provided in the embodiment;

[0035] Figure 6 A schematic diagram showing the twisting start point of the first center tap and the position of the main magnetic ring, provided in an embodiment of this application;

[0036] Figure 7 A circuit diagram of a network transformer provided in yet another embodiment of this application;

[0037] Figure 8 for Figure 7 A schematic diagram of the network transformer provided in the embodiment;

[0038] Figure 9 A schematic diagram of the connector structure provided in another embodiment of this application;

[0039] Figure 10 This is a schematic diagram of the installation of the network transformer and circuit board provided in an embodiment of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Housing; 2. Circuit board; 3. Connecting terminals; 4. Network transformer;

[0042] 110. Main magnetic ring; 120. Primary coil; 130. Primary twisted-pair wire; 1301. First conductor; 1302. Second conductor; 1303. Third conductor; 140. Secondary coil; 150. Secondary twisted-pair wire; 1501. Fourth conductor; 1502. Fifth conductor; 1503. Sixth conductor; 160. Seventh conductor; 170. First center tap; 180. Second center tap; 190. First twisted pair; 191. Second twisted pair; 192. First stage lead; 193. Second stage lead;

[0043] 210. First common-mode magnetic ring; 220. First common-mode coil; 230. Common-mode twisted wire;

[0044] 310. Second common-mode magnetic ring; 320. Second common-mode coil. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. 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.

[0046] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0047] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0048] Network transformers are commonly used components in electronic devices, playing a crucial role in suppressing interference and improving signal integrity. Existing network transformers often employ winding processes such as "2-wire + 2-wire parallel winding" or "4-wire + 4-wire parallel winding." The "2-wire + 2-wire" structure is prone to winding asymmetry due to manufacturing deviations, leading to magnetic saturation and signal imbalance. While the "4-wire + 4-wire" structure can improve some performance, it increases distributed capacitance, affecting high-frequency characteristics. Furthermore, it suffers from complex manufacturing processes and larger size, impacting signal integrity and transmission reliability, thus failing to meet the requirements of current high-speed network transmission.

[0049] like Figure 1 , Figure 2As shown, to solve the above problems, this application provides a network transformer, including a main magnetic ring 110, a primary coil 120, and a secondary coil 140. The primary coil 120 is disposed on the main magnetic ring 110 and includes primary twisted wires 130 wound at intervals on the main magnetic ring 110. The primary twisted wires 130 include a first conductor 1301, a second conductor 1302, and a third conductor 1303 twisted together. The secondary coil 140 is disposed on the main magnetic ring 110 and is symmetrically arranged with respect to the primary coil 120 about the main magnetic ring 110. The secondary coil 140 includes secondary twisted wires 150 wound at intervals on the main magnetic ring 110. The secondary twisted wires 150 include a fourth conductor 1501, a fifth conductor 1502, and a sixth conductor 1503 twisted together.

[0050] The network transformer also includes a seventh conductor 160. The first conductor 1301, the second conductor 1302, the third conductor 1303, the fourth conductor 1501, the fifth conductor 1502, the sixth conductor 1503 and the seventh conductor 160 all include a beginning wire end and an end wire end. The end wire end r' of the first conductor 1301, the beginning wire G of the fifth conductor 1502 and the end wire n' of the seventh conductor 160 are twisted together to form the first center tap 170 of the primary coil 120.

[0051] The end wire b' of the second conductor 1302 is twisted with the end wire b' of the fourth conductor 1501 to form a first twisted pair 190. The beginning wire N of the third conductor 1303 is twisted with the beginning wire N of the sixth conductor 1503 to form a second twisted pair 191. The first twisted pair 190 and the second twisted pair 191 are twisted together to form the second center tap 180 of the secondary coil 140.

[0052] As can be seen from the above, by setting the primary coil 120 and secondary coil 140 symmetrically arranged about the main magnetic ring 110 to form a transformer T1, the electromagnetic field distribution is made uniform, reducing electromagnetic interference between coils and improving the transformer's anti-interference capability. It also helps to improve the transformer's transmission efficiency and reduce energy loss. The three-wire structure used in this application, compared to the existing two-wire + two-wire structure, can form a more balanced electromagnetic field distribution, improve high-frequency signal integrity, and has stronger anti-interference capability. Furthermore, it is smaller in size than the four-wire + four-wire structure and has a simpler winding process. In addition, by introducing the seventh conductor 160 to achieve triple shielding of the first center tap 170, and by using a twisted-pair composite structure to reduce the contact resistance of the second center tap 180, impedance matching is more accurate.

[0053] It should be noted that the main magnetic ring 110 is made of ferrite material with high magnetic permeability to ensure efficient magnetic flux conduction.

[0054] It should also be noted that the primary twisted wire 130 is wound at equal intervals around the main magnetic ring 110, and the secondary twisted wire 150 is wound at equal intervals around the main magnetic ring 110, with the winding directions of the primary twisted wire 130 and the secondary twisted wire 150 opposite to ensure a symmetrical distribution of the electromagnetic field. For example, the primary twisted wire 130 is wound clockwise, and the secondary twisted wire 150 is wound counterclockwise; additionally, as... Figure 2 As shown, the main magnetic ring 110 includes two regions with a central angle of 180°. The two regions are symmetrical about the straight line OO'. The primary twisted wire 130 is wound at equal intervals in one region, and the secondary twisted wire 150 is wound at equal intervals in the other region.

[0055] It should also be noted that the number of turns in the primary coil 120 and the secondary coil 140 is determined according to the transformer's turns ratio requirements. The turns ratio of the primary coil 120 and the secondary coil 140 determines the voltage transformation ratio of the transformer, and the turns ratio of a high-frequency network transformer is 1:1; for example, as Figure 2 As shown, both the primary coil 120 and the secondary coil 140 have 7 turns.

[0056] It should also be noted that the first conductor 1301, the second conductor 1302, and the third conductor 1303 can be made of copper wire with a diameter of 0.07mm, and the first conductor 1301, the second conductor 1302, and the third conductor 1303 are twisted together sequentially; the first conductor 1301, the second conductor 1302, and the third conductor 1303 are not the same color, for example, as shown. Figure 3 As shown, the colors of the first conductor 1301, the second conductor 1302, and the third conductor 1303 are red, blue, and gold, respectively, and the twisted wire sequence is red, blue, and gold.

[0057] It should also be noted that the fourth conductor 1501, the fifth conductor 1502, and the sixth conductor 1503 can be made of copper wire with a diameter of 0.07mm, and the fourth conductor 1501, the fifth conductor 1502, and the sixth conductor 1503 are twisted together sequentially; the fourth conductor 1501, the fifth conductor 1502, and the sixth conductor 1503 are not the same color, for example, as shown. Figure 3 As shown, the colors of the fourth conductor 1501, the fifth conductor 1502, and the sixth conductor 1503 are blue, green, and gold, respectively, and the twisted wire sequence is blue-green-gold.

[0058] It should also be noted that the first conductor 1301, the second conductor 1302, the third conductor 1303, the fourth conductor 1501, the fifth conductor 1502, the sixth conductor 1503 and the seventh conductor 160 can be enamel-coated wires.

[0059] It should also be noted that the starting and ending ends of the first conductor 1301 are R and r', respectively; the starting and ending ends of the second conductor 1302 are B and b', respectively; the starting end of the third conductor 1303 is N and the ending end is N and n', respectively; the starting and ending ends of the fourth conductor 1501 are B and b', respectively; the starting and ending ends of the fifth conductor 1502 are G and g', respectively; the starting and ending ends of the sixth conductor 1503 are N and n', respectively; and the starting and ending ends of the first conductor 1301 are N and n', respectively.

[0060] like Figure 1 As shown, in some embodiments, the beginning wire B of the second conductor 1302 and the beginning wire B of the fourth conductor 1501 form a first-stage lead 192, and the end wire n' of the third conductor 1303 and the end wire n' of the sixth conductor 1503 are twisted together to form a second-stage lead 193.

[0061] By stranding the primary lead 192 and the secondary lead 193, not only can signal transmission be optimized, but structural reliability can also be improved.

[0062] In some embodiments, the twist rate of both the primary twisted cable 130 and the secondary twisted cable 150 is 16-20 strands / inch.

[0063] By limiting the twist rate of both the primary twisted wire 130 and the secondary twisted wire 150 to 16-20 strands / inch, not only is the symmetry of the primary coil 120 and the secondary coil 140 about the main magnetic ring 110 guaranteed, but also the high performance and high yield of the transformer can be ensured. On the one hand, this avoids problems such as increased high-frequency loss, insufficient mechanical strength, and winding process failures caused by excessive twist rate; on the other hand, it avoids problems such as increased capacitance and deteriorated heat dissipation caused by insufficient twist rate.

[0064] It should be noted that the degree of twist refers to the straight-line distance that a single conductor travels when it rotates 360° along the axis of the strand.

[0065] In some embodiments, the length of the first center tap 170 is 5-6 mm, and the solder length of the first center tap 170 is 1-2 mm.

[0066] By limiting the length of the first center tap 170 and the solder, the requirements of high strength, low impedance and high frequency stability are met simultaneously. This avoids the problems of high frequency performance degradation and wasted space due to the first center tap 170 being too long, and poor soldering reliability and low mechanical strength due to the first center tap 170 being too short. It also avoids the problems of short circuit risk and thermal stress concentration due to the solder being too long, and insufficient mechanical strength and poor conductivity due to the solder being too short.

[0067] like Figure 6 As shown, in some embodiments, the distance L1 between the twisting start point of the first center tap 170 and the outer wall of the main magnetic ring 110 satisfies the following relationship: 0 < L1 ≤ 1 mm.

[0068] By maintaining a distance between the first center tap 170 and the outer wall of the main magnetic ring 110, eddy current losses caused by direct contact between the wires and the main magnetic ring 110 are avoided, while ensuring insulation safety and meeting the withstand voltage and heat dissipation requirements.

[0069] like Figure 4 , Figure 5 As shown, in some embodiments, the network transformer includes a first common-mode magnetic ring 210 and a first common-mode coil 220; the first common-mode magnetic ring 210 is arranged at intervals with the main magnetic ring 110; the first common-mode coil 220 is disposed on the first common-mode magnetic ring 210, and the first common-mode coil 220 includes a common-mode twisted wire 230 wound at intervals on the first common-mode magnetic ring 210; wherein, the first conductor 1301, the fifth conductor 1502 and the seventh conductor 160 are twisted together to form the common-mode twisted wire 230, and the starting end R of the first conductor 1301, the ending end g' of the fifth conductor 1502 and the starting end N of the seventh conductor 160 are separated.

[0070] A three-wire common-mode choke T2 is formed by the first common-mode magnetic ring 210 and the common-mode twisted wires 230 wound intermittently around the first common-mode magnetic ring 210. The seventh wire 160 led out from the first common-mode magnetic ring 210 is used as the center tap of the common-mode choke. The center tap provides a low-impedance discharge path to ground for the common-mode noise current. Compared with the two-wire common-mode choke structure, this application introduces almost no additional series inductance in the differential signal path, thereby maintaining the integrity of the high-speed differential signal. At the same time, the common-mode DC components on any line of the network transformer, such as POE voltage or unbalanced branch differential-mode components, can be directly returned to ground through the center tap.

[0071] It should be noted that, as Figure 5 As shown, the first common-mode coil 220 has 5 turns.

[0072] It should also be noted that by pulling the first center tap 170 and the second center tap 180 180° apart to achieve the crossing and close proximity of the first center tap 170 and the second center tap 180, the first stage lead 192 and the second stage lead 193 are arranged side by side and then wrapped 360° around the first center tap 170, the second center tap 180, and the common mode twisted wire 230 between the main magnetic ring 110 and the first common mode magnetic ring 210 to complete the twisting.

[0073] like Figure 5As shown, in some embodiments, the distance L2 between the main magnetic ring 110 and the first common-mode magnetic ring 210 satisfies the following relationship: 0 < L2 ≤ 3 mm.

[0074] By setting a gap between the main magnetic ring 110 and the first common-mode magnetic ring 210, problems such as electromagnetic interference, overheating and mechanical failure can be avoided.

[0075] In some embodiments, the twist rate of the common-mode twisted cable 230 is 16-20 strands / inch.

[0076] By limiting the twist rate of the common-mode twisted cable 230 to 16-20 strands / inch, it is possible to simultaneously achieve high-frequency common-mode noise suppression and zero interference with differential-mode signals, while ensuring mechanical strength and reliability.

[0077] like Figure 7 , Figure 8 As shown, in some embodiments, the network transformer includes a second common-mode magnetic ring 310 and a second common-mode coil 320; the second common-mode magnetic ring 310 is arranged at intervals from the main magnetic ring 110 and the first common-mode magnetic ring 210; wherein, the first stage lead 192 and the second stage lead 193 are wound parallel to each other on the second common-mode magnetic ring 310 to form the second common-mode coil 320, and the exit ends of the first stage lead 192 and the second stage lead 193 are separated from each other.

[0078] A two-wire common-mode choke T22 is formed by the first common-mode magnetic ring 210 and the first stage lead 192 and the second stage lead 193 that are parallel to and wound around the first common-mode magnetic ring 210; by adding the common-mode choke T22, the common-mode return loss suppression capability is effectively improved.

[0079] It should be noted that, as Figure 8 As shown, the second common-mode coil 320 has 4 turns.

[0080] It should also be noted that common-mode return loss is an indicator of the degree of common-mode signal reflection in a differential transmission system, reflecting the proportion of common-mode signal energy reflected back to the source due to impedance mismatch.

[0081] like Figure 9 , Figure 10 As shown, this application embodiment also provides a connector, including a housing 1, a circuit board 2, and a network transformer 4 as described in any embodiment of this application, wherein the circuit board 2 is disposed inside the housing 1; and the network transformer 4 is disposed on the circuit board 2.

[0082] It should be noted that, as Figure 10 As shown, multiple network transformers 4 can be installed on the circuit board 2. The specific number and arrangement of the network transformers 4 can be set according to specific needs, and this application does not impose specific restrictions.

[0083] It should also be noted that, such as Figure 9 As shown, the connector also includes a connection terminal 3 disposed on the circuit board 2.

[0084] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0085] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0086] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A network transformer, characterized in that, include: Main magnetic ring; A primary coil is disposed on the main magnetic ring. The primary coil includes a primary twisted wire wound at intervals on the main magnetic ring. The primary twisted wire includes a first wire, a second wire, and a third wire twisted together. as well as A secondary coil is disposed on the main magnetic ring. The secondary coil and the primary coil are arranged symmetrically about the main magnetic ring. The secondary coil includes secondary twisted wires wound at intervals on the main magnetic ring. The secondary twisted wires include a fourth wire, a fifth wire, and a sixth wire twisted together. The network transformer further includes a seventh conductor. The first conductor, the second conductor, the third conductor, the fourth conductor, the fifth conductor, the sixth conductor, and the seventh conductor all include a beginning wire end and an end wire end. The end wire end of the first conductor, the beginning wire end of the fifth conductor, and the end wire end of the seventh conductor are twisted together to form the first center tap of the primary coil. The end of the second conductor is twisted with the end of the fourth conductor to form a first twisted pair, and the beginning of the third conductor is twisted with the beginning of the sixth conductor to form a second twisted pair. The first twisted pair and the second twisted pair are twisted together to form the second center tap of the secondary coil.

2. The network transformer according to claim 1, characterized in that, The beginning of the second conductor and the beginning of the fourth conductor form a first-stage lead wire, and the end of the third conductor and the end of the sixth conductor are twisted together to form a second-stage lead wire.

3. The network transformer according to claim 1, characterized in that, The twist rate of both the primary twisted cable and the secondary twisted cable is 16-20 strands / inch.

4. The network transformer according to claim 1, characterized in that, The length of the first center tap is 5-6mm, and the solder length of the first center tap is 1-2mm.

5. The network transformer according to claim 1, characterized in that, The distance L1 between the starting point of the first center tap and the outer wall of the main magnetic ring satisfies the following relationship: 0 < L1 ≤ 1 mm.

6. The network transformer according to claim 2, characterized in that, The network transformer includes: A first common-mode magnetic ring is arranged at a distance from the main magnetic ring; and A first common-mode coil is disposed on the first common-mode magnetic ring, and the first common-mode coil includes a common-mode twisted wire wound at intervals on the first common-mode magnetic ring; The first conductor, the fifth conductor, and the seventh conductor are twisted together to form the common-mode twisted cable, and the beginning end of the first conductor, the end end of the fifth conductor, and the beginning end of the seventh conductor are separate.

7. The network transformer according to claim 6, characterized in that, The distance L2 between the main magnetic ring and the first common-mode magnetic ring satisfies the following relationship: 0 < L2 ≤ 3 mm.

8. The network transformer according to claim 6, characterized in that, The twist rate of the common-mode twisted cable is 16-20 strands / inch.

9. The network transformer according to claim 6, characterized in that, The network transformer includes a second common-mode magnetic ring and a second common-mode coil. The second common-mode magnetic ring is arranged at intervals from the main magnetic ring and the first common-mode magnetic ring. The first-stage lead and the second-stage lead are wound parallel to each other on the second common-mode magnetic ring to form the second common-mode coil, and the exit ends of the first-stage lead and the second-stage lead are separated from each other.

10. A connector, characterized in that, include: shell; A circuit board is disposed within the housing; as well as The network transformer as described in any one of claims 1-9, wherein the network transformer is disposed on the circuit board.

Images