TWI766367B - Lan transformer and method for manufacturing same - Google Patents

Abstract

A LAN transformer and a method for manufacturing the LAN transformer are disclosed. The LAN transformer includes a transformer core and a plurality of magnet wires wound around the transformer core. The magnet wires form at least one first positive electrode lead and at least one first negative electrode lead on a first side of the LAN transformer and form at least one second positive electrode lead and at least one second negative electrode lead on a second side of the LAN transformer. The at least one first positive electrode lead and the at least one first negative electrode lead are partially twisted together, and the at least one second positive electrode lead and the at least one second negative electrode lead are partially twisted together, so that the LAN transformer satisfies a preset characteristic impedance standard within a working bandwidth.

Description

Network transformer and method of making a network transformer

Embodiments of the present invention relate to a transformer and a method of manufacturing the same. More specifically, embodiments of the present invention relate to a network transformer and method of manufacturing a network transformer.

In today's network communication architecture, various electronic devices can be connected to each other via a local area network (LAN). In the case of transmitting and receiving data under high-speed local area network (such as 1G, 2.5G, 5G, 10Gbps), the transmission signal is often severely attenuated and interfered, and the network transformer is designed to solve this problem. installation.

Impedance mismatch is likely to cause serious signal distortion or electromagnetic wave dissipation. In order to achieve impedance matching, the characteristic impedance (Characteristic Impedance) of the network transformer must meet the preset specifications (that is, the characteristic impedance of the network transformer must be maintained within a specific operating frequency band. within a preset range). The characteristic impedance is related to the resistance, inductance, and capacitance values of the network transformer, and the resistance, inductance, and capacitance values of the network transformer will vary due to its design mode. Generally speaking, in the design stage of the network transformer, the resistance value and inductance value of the network transformer can be completely measured or estimated, but due to the line capacitance between the complex enameled wires wound on the iron core of the network transformer The locations in the network transformer are quite scattered, so it is usually difficult to completely measure or estimate the capacitance value of the network transformer, which also makes it impossible to correctly calculate its characteristic impedance in the design stage of the network transformer. After the design of the network transformer is completed, the characteristic impedance of the network transformer can be calculated based on the resistance value, inductance value and capacitance value of the designed network transformer.

Since the factor affecting the characteristic impedance of the network transformer is difficult to control, once it is found that the characteristic impedance of the designed network transformer does not meet the preset standard, the traditional method is to return to the design stage of the network transformer and make an adjustment to the network transformer. It is obviously time-consuming, labor-intensive and inefficient. In addition to this, when the design pattern of a network transformer is adjusted in order to change the characteristic impedance, other properties of the network transformer (e.g., Insertion Loss, Return Loss) are usually also changed. etc.), which increases the difficulty of designing network transformers to comply with multiple preset criteria simultaneously (eg, characteristic impedance criteria, insertion loss criteria, return loss criteria, etc.). Therefore, there is no shortage of traditional practices with preset standards that directly reduce or even ignore the characteristic impedance of the network transformer.

In view of this, how to design a specific transformer structure that can make the network transformer meet the characteristic impedance standard and provide a method for manufacturing the network transformer with the specific transformer structure will be problems to be solved in the technical field of the present invention.

In order to solve at least the above problems, embodiments of the present invention provide a network transformer. The network transformer may include a transformer core and a plurality of enameled wires. The plurality of enameled wires are wound on the transformer core, and at least one first positive lead and at least one first negative lead are formed on a first side of the network transformer, and formed on a second side of the network transformer At least one second positive lead and at least one second negative lead. The at least one first positive lead and the at least one first negative lead are partially twisted with each other, and the at least one second positive lead and the at least one second negative lead are partially twisted with each other, so that the network transformer is in an operating frequency band conforms to a predetermined characteristic impedance standard.

In order to solve at least the above problems, embodiments of the present invention further provide a network transformer. The network transformer can include a transformer core, a plurality of enameled wires and a filter core. The plurality of enameled wires are wound on the transformer core, and form at least one first positive lead and at least one first negative lead on a first side of the network transformer, and form a twist on one side of the transformer core Wire. The filter core is wound by the stranded wire, and the stranded wire forms at least one second positive lead and at least one second negative lead on a second side of the network transformer. The at least one first positive lead and the at least one first negative lead are partially twisted with each other, and the at least one second positive lead and the at least one second negative lead are partially twisted with each other, so that the network transformer is in an operating frequency band conforms to a predetermined characteristic impedance standard.

In order to solve at least the above problems, embodiments of the present invention also provide a method for manufacturing a network transformer. The method may include the following steps: winding a plurality of enameled wires on a transformer core, forming at least one first positive lead and at least one first negative lead on a first side of the network transformer, and forming at least one first positive lead and at least one first negative lead on a first side of the network transformer, and A second side forms at least one second positive lead and at least one second negative lead; and partially intertwine the at least one first positive lead and the at least one first negative lead, and partially intertwine the at least one second lead The positive lead and the at least one second negative lead are used to generate the network transformer and make the network transformer meet a predetermined characteristic impedance standard in a working frequency band.

In order to solve at least the above problems, embodiments of the present invention also provide a method for manufacturing a network transformer. The method may include the following steps: winding a plurality of enameled wires on a transformer core, and forming at least one first positive lead and at least one first negative lead on a first side of the network transformer, and forming at least one first positive lead and at least one first negative lead on a first side of the network transformer, and on the transformer core forming a stranded wire on one side; winding the stranded wire on a filter core, and forming at least a second positive lead and at least a second negative lead on a second side of the network transformer; and partially intertwisted The at least one first positive lead and the at least one first negative lead, and the at least one second positive lead and the at least one second negative lead are partially intertwisted to create the network transformer and make the network transformer A predetermined characteristic impedance standard is met within a working frequency band.

The network transformer disclosed in this paper has a specific transformer structure, that is, part of the signal leads on the primary side of the network transformer are twisted with each other, and part of the signal leads on the secondary side of the network transformer are also twisted with each other. Such an intertwisted structure can additionally increase the line capacitance of the network transformer without changing the design mode of the network transformer, thereby making the characteristic impedance of the network transformer meet a preset characteristic impedance standard. In addition to this, the twisted structure can improve other properties of the network transformer (eg insertion loss, return loss, etc.). Accordingly, the network transformer disclosed herein can effectively solve the above-mentioned problems faced by the traditional network transformer. In addition, in the method for manufacturing a network transformer disclosed herein, after the design of the network transformer is completed, the signal leads of the primary side and the secondary side of the network transformer can be twisted with each other, so as to not change the network transformer. In the case of the design mode, the line capacitance of the network transformer is additionally added, thereby effectively controlling the characteristic impedance of the network transformer, and making the characteristic impedance of the network transformer comply with a preset characteristic impedance standard. In addition, other properties of the network transformer (eg insertion loss, return loss, etc.) can also be controlled through this intertwisting action. Accordingly, the method for manufacturing a network transformer disclosed herein can also effectively solve the above-mentioned problems faced by the conventional method for manufacturing a network transformer.

The above contents are not intended to limit the present invention, but merely describe the technical problems that can be solved by the present invention, the technical means that can be adopted and the technical effects that can be achieved, so that those with ordinary knowledge in the technical field to which the present invention belongs can have a preliminary understanding of the present invention. invention. Those with ordinary knowledge in the technical field to which the present invention pertains can further understand the details of various embodiments of the present invention according to the attached drawings and the contents described in the following embodiments.

The present invention will be described below through various embodiments, but these embodiments are not intended to limit the present invention to only be implemented according to the described operations, environments, applications, structures, processes or steps. Elements not directly related to the present invention are not shown in the drawings, but may be implicit in the drawings. In the drawings, the size of each element and the ratio between each element are only examples, and are not intended to limit the present invention. Unless otherwise specified, in the following content, the same (or similar) element symbols may correspond to the same (or similar) elements. Where possible, the number of each of the elements described below may be one or more, unless otherwise specified.

The terms used in the present disclosure are only used to describe the embodiments, and are not intended to limit the present invention. The singular form "a" is intended to include the plural form as well, unless the context clearly dictates otherwise. The terms "comprising", "comprising" and the like indicate the presence of the stated features, integers, steps, operations, elements and/or elements, but do not exclude one or more other features, integers, steps, operations, elements, elements and/or elements or a combination of the foregoing. The term "and/or" includes any and all combinations of one or more of the associated listed items.

Unless the context dictates otherwise, references to "First Positive Lead", "First Negative Lead", "Second Positive Lead", "Second Negative Lead", "First Negative Ground Lead", "First Positive Ground Lead" The definitions of "wire", "second negative ground wire" and "second positive ground wire" should be interpreted as follows: "First" means located on the primary side of the network transformer; "Second" means located on the second side of the network transformer. Secondary side; "positive" means the wire head from the enameled wire; "negative" means the wire tail from the enameled wire; "lead" means the signal terminal of the network transformer; and "ground wire" means the grounding of the network transformer end.

FIG. 1 illustrates a schematic diagram of the architecture of a network transformer according to some embodiments of the present invention. The content shown in FIG. 1 is only for illustrating an embodiment of the present invention, rather than for limiting the protection scope of the present invention.

As shown in FIG. 1 , the network transformer 1 may include a transformer core 10 . According to different applications, the transformer core 10 can be various cores that can be wound with enameled wires to form inductance coils. For example, the shape of the transformer core 10 can be a toroidal core, a mouth-shaped core, a Japanese-shaped core, an I-shaped drum core, an I-shaped core, a C-shaped core, a pot-shaped core, etc. , and the material of the transformer core 10 may be iron oxide, silicon steel, alloy powder, etc., but not limited thereto. .

In addition to the transformer core 10, the network transformer 1 may further include a plurality of enameled wires wound on the transformer core 10, and these enameled wires are various metal wires with insulating layers. According to the communication characteristics to be achieved in different working frequency bands (eg 1G, 2.5G, 5G, 10Gbps), the number of enameled wires wound on the transformer core 10 of the network transformer 1 can be determined, and the enameled wires can be wound on the transformer iron. The way and number of turns of the core 10. In other words, in the embodiments of the present invention, the number of enameled wires, the manner of winding the enameled wires to the transformer core 10 and the number of turns are not limited. For example, the number of enameled wires may be four, six, eight, twelve, sixteen, and so on. For example, the number of winding turns may be six turns, eight turns, ten turns, twenty turns, and so on. For example, the winding method may be to twist all the enameled wires into a twisted wire first, and then wrap the twisted wire around the transformer core 10, first twist some enameled wires to each other, and then respectively wrap the twisted wires around the transformer core 10. or wind all the enameled wires directly on the transformer core 10, etc.

1, for example, a network transformer 1 may include four enameled wires W1, W2, W3, W4, wherein the enameled wires W1, W2, W3, W4 are twisted into a stranded wire, and the stranded wire is wound around the transformer core 10 On one side of the transformer core 10 (ie, the primary side of the network transformer 1 ), a first positive lead W11 , a first negative lead W22 and a first negative ground can be pulled out or formed through line arrangement. Line W12 and a first positive grounding line W21, and pull out or form a second positive lead W31 and a second negative lead W42 on the other side of the transformer core 10 (ie, the secondary side of the network transformer 1) , a second negative ground wire W32 and a second positive ground wire W41.

The first positive lead W11 and the first negative lead W22 are respectively used as two signal terminals on the primary side of the network transformer 1 , wherein the first positive lead W11 and the first negative lead W22 are partially twisted with each other, and the first positive lead W11 comes from The first negative lead W22 comes from the end of the enameled wire W2. The first negative ground wire W12 and the first positive ground wire W21 together serve as the ground terminal of the primary side of the network transformer 1, wherein the first negative ground wire W12 and the first positive ground wire W21 are partially or completely twisted with each other, and The first negative ground wire W12 comes from the tail of the enameled wire W1, and the first positive ground wire W21 comes from the head of the enameled wire W2.

The second positive lead W31 and the second negative lead W42 are respectively used as two signal terminals on the secondary side of the network transformer 1 , wherein the second positive lead W31 and the second negative lead W42 are partially twisted with each other, and the second positive lead W31 comes from the head of the enameled wire W3, and the second negative lead W42 comes from the tail of the enameled wire W4. The second negative ground wire W32 and the second positive ground wire W41 together serve as the ground terminal of the secondary side of the network transformer 1, wherein the second negative ground wire W32 and the second positive ground wire W41 are partially or completely twisted with each other, And the second negative ground wire W32 comes from the tail of the enameled wire W3, and the second positive ground wire W41 comes from the head of the enameled wire W4.

The characteristic impedance of the network transformer 1 is determined by the resistance value, inductance value and capacitance value of the network transformer 1, wherein the inductance value mainly depends on the number of turns of the enameled wires W1, W2, W3, W4 wound around the transformer core 10, The capacitance value mainly includes stray capacitance value and line capacitance value. The stray capacitance value refers to the capacitance generated between the primary side and the secondary side of the network transformer 1, and the line capacitance value refers to the capacitance formed between the enameled wires W1, W2, W3, and W4. Due to the intertwisted portion of the first positive lead W11 and the first negative lead W22 and the intertwisted portion of the second positive lead W31 and the second negative lead W42, an additional network can be added without changing the design mode of the network transformer 1 The line capacitance of the transformer 1 makes the characteristic impedance of the network transformer 1 conform to a predetermined characteristic impedance standard. In addition to this, the twisted structure can improve other properties of the network transformer (eg insertion loss, return loss, etc.).

In some embodiments, optionally, the intertwisted portion of the first positive lead W11 and the first negative lead W22 and the intertwisted portion of the first negative ground wire W12 and the first positive ground wire W21 may also be intertwisted with each other, Thereby, the position of the twisted portion of the first positive lead W11 and the first negative lead W22 in the network transformer 1 can be fixed, and the line capacitance of the network transformer 1 can be increased. In addition, optionally, the intertwisted portion of the second positive lead W31 and the second negative lead W42 and the intertwisted portion of the second negative ground wire W32 and the second positive ground wire W41 can also be intertwisted with each other, thereby fixing the The position of the twisted portion of the second positive lead W31 and the second negative lead W42 in the network transformer 1 further increases the line capacitance of the network transformer 1 . Through the above-mentioned additional twisting action, the space required for packaging the network transformer 1 can also be saved, and the wiring arrangement before the packaging of the network transformer 1 can be facilitated.

In other embodiments, the network transformer 1 may include two enameled wires W1, two enameled wires W2, one enameled wire W3 and one enameled wire W4, a total of six enameled wires, wherein the six enameled wires are twisted into a twisted wire, and the twisted wire is wound on Two first positive leads W11, two first negative leads W22, two first negative ground leads W12 and two A first positive ground wire W21, and a second positive lead W31, a second negative lead W42, and a second negative ground wire are formed on the other side of the transformer core 10 (ie, the secondary side of the network transformer 1). W32 and a second positive ground wire W41. Different from the embodiments of the four enameled wires W1, W2, W3, and W4, in these embodiments of the six enameled wires, the two first positive leads W11 are used as a signal end of the primary side of the network transformer 1, and the two first negative leads The lead W22 is used as the other signal terminal of the primary side of the network transformer 1 , and the two first positive leads W11 and the two first negative leads W22 are partially twisted with each other. In addition, the two first negative ground wires W12 and the two first positive ground wires W21 together serve as the ground terminals of the primary side of the network transformer 1, and the two first negative ground wires W12 and the two first positive ground wires W21 Partially twisted or fully twisted.

In other embodiments, the network transformer 1 may include one enameled wire W1, one enameled wire W2, two enameled wires W3 and two enameled wires W4, a total of six enameled wires, wherein the six enameled wires are twisted into a twisted wire, and the twisted wire is wound on A first positive lead W11, a first negative lead W22, a first negative ground lead W12 and a first positive lead W11, a first negative lead W22, a first negative ground lead W12 and a The first positive ground wire W21, and two second positive lead wires W31, two second negative lead wires W42, and two second negative ground wires are formed on the other side of the transformer core 10 (ie, the secondary side of the network transformer 1). W32 and two second positive ground lines W41. Different from the embodiments of the four enameled wires W1, W2, W3, and W4, in these embodiments of the six enameled wires, the two second positive leads W31 are used as a signal terminal of the secondary side of the network transformer 1, and the two second positive leads W31 The negative lead W42 is used as another signal terminal of the secondary side of the network transformer 1 , and the two second positive leads W31 and the two second negative leads W42 are partially twisted with each other. In addition, the two second negative ground wires W32 and the two second positive ground wires W41 together serve as the ground terminals of the secondary side of the network transformer 1, and the two second negative ground wires W32 and the two second positive ground wires W41 is partially or fully twisted.

In other embodiments, the network transformer 1 may include two enameled wires W1, two enameled wires W2, two enameled wires W3 and two enameled wires W4, a total of eight enameled wires, wherein the eight enameled wires are twisted into a twisted wire, and the twisted wire is wound on Two first positive leads W11, two first negative leads W22, two first negative ground leads W12 and two The first positive ground wire W21, and two second positive lead wires W31, two second negative lead wires W42, and two second negative ground wires are formed on the other side of the transformer core 10 (ie, the secondary side of the network transformer 1). W32 and two second positive ground lines W41. Different from the embodiment of the four enameled wires W1, W2, W3, W4, in these embodiments of the eight enameled wires, the two first positive leads W11 are used as a signal end of the primary side of the network transformer 1, the two first negative leads The lead W22 is used as the other signal terminal of the primary side of the network transformer 1 , and the two first positive leads W11 and the two first negative leads W22 are partially twisted with each other; and the two second positive leads W31 are used as the network transformer 1 One signal terminal of the secondary side of the network transformer 1, the two second negative leads W42 are used as the other signal terminals of the secondary side of the network transformer 1, and the two second positive leads W31 and the two second negative leads W42 are partially connected to each other. twist. In addition, the two first negative ground wires W12 and the two first positive ground wires W21 together serve as the ground terminals of the primary side of the network transformer 1, and the two first negative ground wires W12 and the two first positive ground wires W21 The two second negative ground wires W32 and the two second positive ground wires W41 together serve as the ground terminals of the secondary side of the network transformer 1, and the two second negative ground wires W32 Partially or completely twisted with the two second positive ground wires W41.

FIG. 2 illustrates a schematic diagram of the architecture of a network transformer according to some other embodiments of the present invention. The content shown in FIG. 2 is only for illustrating an embodiment of the present invention, rather than for limiting the present invention. The following description will focus on the differences between the network transformer 1 shown in FIG. 1 and the network transformer 2 shown in FIG. 2 .

As shown in FIG. 2 , in addition to the transformer core 10 and the four enameled wires W1 , W2 , W3 and W4 , the network transformer 2 also includes a filter core 22 . The filter core 22 can be used as a common mode filter to filter out the common mode signal of the network transformer 2 . Four enameled wires W1, W2, W3, W4 are wound on the transformer core 10, and a first positive lead W11, a first negative lead W11 and a first negative lead are formed on one side of the transformer core 10 (ie, the primary side of the network transformer 2). The lead wire W22 , a first negative ground wire W12 and a first positive ground wire W21 , and a signal stranded wire and a ground stranded wire are formed on the other side of the transformer core 10 . The signal stranded wire is a twisted pair formed by the wire head of the enameled wire W3 and the wire tail of the enameled wire W4, and the ground wire is a twisted pair formed by the wire tail of the enameled wire W3 and the wire head of the enameled wire W4. .

The setting of the signal lead and the ground wire on the primary side of the network transformer 2 is the same as the setting of the signal lead and the ground wire on the primary side of the network transformer 1 . The ground wire formed on the other side of the transformer core will serve as the ground terminal of the secondary side of the network transformer 2 (that is, the partially or fully intertwisted second negative ground wire W32 and the second positive ground wire W32). The ground wire W41), and the signal stranded wire formed on the other two sides of the transformer core is wound on the filter core 22, and a second positive lead W31 is formed on one side of the filter core 22 and A second negative lead W42. The second positive lead W31 and the second negative lead W42 are respectively used as two signal terminals of the secondary side of the network transformer 2 , and the second positive lead W31 and the second negative lead W42 are partially twisted with each other. Like the network transformer 1, the intertwisted portion of the first positive lead W11 and the first negative lead W22 and the intertwisted portion of the second positive lead W31 and the second negative lead W42 can also be used without changing the design mode of the network transformer 2. In this case, the line capacitance of the network transformer 2 is additionally increased, so that the characteristic impedance of the network transformer 2 conforms to a predetermined characteristic impedance standard. In addition to this, the twisted structure can improve other properties of the network transformer (eg insertion loss, return loss, etc.).

In other embodiments, the network transformer 2 may include two enameled wires W1, two enameled wires W2, one enameled wire W3 and one enameled wire W4, a total of six enameled wires, wherein the six enameled wires are twisted into a twisted wire, and the twisted wire is wound on Two first positive leads W11, two first negative leads W22, two first negative grounding leads W12 and two The first positive ground wire W21 forms a signal strand and a ground strand on the other side of the transformer core 10 . The signal stranded wire is a twisted pair formed by the wire head of the enameled wire W3 and the wire tail of the enameled wire W4, and the ground wire is a twisted pair formed by the wire tail of the enameled wire W3 and the wire head of the enameled wire W4. . The ground stranded wire will serve as the ground terminal of the secondary side of the network transformer 2 , and the signal stranded wire is wound on the filter core 22 , and a second positive lead W31 is formed on one side of the filter core 22 . with a second negative lead W42. The second positive lead W31 and the second negative lead W42 are respectively used as two signal terminals of the secondary side of the network transformer 2 , and the second positive lead W31 and the second negative lead W42 are partially twisted with each other.

In other embodiments, the network transformer 2 may comprise a total of six enameled wires W1, one enameled wire W2, two enameled wires W3 and two enameled wires W4, wherein the six enameled wires are twisted into a twisted wire, and the twisted wire is wound on A first positive lead W11 , a first negative lead W22 , a first negative grounding lead W12 and a first positive lead W11 , a first negative lead W22 , a first negative ground lead W12 and a The first positive ground wire W21 forms a signal strand and a ground strand on the other side of the transformer core 10 . The signal stranded wire is a four-stranded wire formed by twisting the ends of the two enameled wires W3 and the wire tails of the two enameled wires W4, and the ground stranded wire is the wire tails of the two enameled wires W3 and the wire ends of the two enameled wires W4 Four twisted wires. The ground strand will serve as the ground terminal of the secondary side of the network transformer 2 , and the signal strand is wound on the filter core 22 , and two second positive leads W31 are formed on one side of the filter core 22 . with two second negative leads W42. The two second positive leads W31 are used as one signal end of the secondary side of the network transformer 2 , the two second negative leads W42 are used as the other signal ends of the secondary side of the network transformer 2 , and the two second positive leads W31 and the two second negative leads W42 are partially twisted with each other.

In other embodiments, the network transformer 2 may include two enameled wires W1, two enameled wires W2, two enameled wires W3 and two enameled wires W4, a total of eight enameled wires, wherein the eight enameled wires are twisted into a twisted wire, and the twisted wire is wound on Two first positive leads W11, two first negative leads W22, two first negative grounding leads W12 and two The first positive ground wire W21 forms a signal strand and a ground strand on the other side of the transformer core 10 . The signal stranded wire is a four-stranded wire formed by twisting the ends of the two enameled wires W3 and the wire tails of the two enameled wires W4, and the ground stranded wire is the wire tails of the two enameled wires W3 and the wire ends of the two enameled wires W4 Four twisted wires. The ground strand will serve as the ground terminal of the secondary side of the network transformer 2 , and the signal strand is wound on the filter core 22 , and two second positive leads W31 are formed on one side of the filter core 22 . with two second negative leads W42. The two second positive leads W31 are used as one signal end of the secondary side of the network transformer 2 , the two second negative leads W42 are used as the other signal ends of the secondary side of the network transformer 2 , and the two second positive leads W31 and the two second negative leads W42 are partially twisted with each other.

In some embodiments, the plurality of enameled wires of the network transformer 2 may form only one stranded wire on the other side of the transformer core 10 thereof, and the stranded wire is wound on the filter core 22 and is One side of the filter core 22 forms two signal terminals and a ground terminal of the secondary side of the network transformer 2 . When the network transformer 2 includes a total of four enameled wires W1, an enameled wire W2, an enameled wire W3 and an enameled wire W4, or when the network transformer 2 includes two enameled wires W1, two enameled wires W2, an enameled wire W3 and an enameled wire W4 in total When there are six enameled wires, the stranded wire is a four-stranded wire formed by twisting the head of the enameled wire W3, the tail of the enameled wire W3, the head of the enameled wire W4, and the tail of the enameled wire W4, and the wire of the enameled wire W3 The head and the tail of the enameled wire W4 respectively form a second positive lead W31 and a second negative lead W42 on the side of the filter core 22, while the tail of the enameled wire W3 and the wire head of the enameled wire W4 are respectively on the filter iron. The side of the core 22 forms a second negative ground wire W32 and a second positive ground wire W41. The second positive lead W31 and the second negative lead W42 are respectively used as two signal terminals of the secondary side of the network transformer 2 , and the second negative ground wire W32 and the second positive ground wire W41 together serve as the secondary side of the network transformer 2 . side ground.

In addition, when the network transformer 2 includes a total of six enameled wires W1, one enameled wire W2, two enameled wires W3 and two enameled wires W4, or when the network transformer 2 includes two enameled wires W1, two enameled wires W2, two enameled wires W3 and two When the enameled wire W4 has a total of eight enameled wires, the stranded wire is stranded by the wire ends of the two enameled wires W3, the wire tails of the two enameled wires W3, the wire ends of the two enameled wires W4, and the wire tails of the two enameled wires W4. The wire ends of the two enameled wires W3 form two second positive leads W31 on the side of the filter core 22, and the tails of the two enameled wires W4 form two second positive leads W31 on the side of the filter core 22. The second negative lead W42, the tails of the two enameled wires W3 form two second negative ground wires W32 on the side of the filter core 22, and the ends of the two enameled wires W4 are on the side of the filter core 22. Two positive ground wire W41. The two second positive leads W31 are used as one signal terminal of the secondary side of the network transformer 2 , the two second negative leads W42 are used as another signal terminal of the secondary side of the network transformer 2 , and the two second negative leads are grounded The line W32 and the two second positive ground lines W41 together serve as the ground terminal of the secondary side of the network transformer 2 .

In the above embodiment, the intertwisted portion of the first positive lead W11 and the first negative lead W22 and the intertwisted portion of the second positive lead W31 and the second negative lead W42 can be used without changing the design mode of the network transformer 2 The line capacitance of network transformer 1 or network transformer 2 is additionally added to control the characteristic impedance of network transformer 1 or network transformer 2, so that the characteristic impedance of network transformer 1 or network transformer 2 conforms to a preset value. Characteristic impedance standard. In addition to this, the twisted structure can improve other properties of the network transformer (eg insertion loss, return loss, etc.). In some embodiments, in order to make the characteristic impedance of the network transformer 1 or the network transformer 2 meet the predetermined characteristic impedance standard, the intertwisted portion of the first positive lead W11 and the first negative lead W22 and the second positive lead W31 The intertwisted portion with the second negative lead W42 may be achieved according to at least one of the following factors: the length of the enameled wire, the laying pitch and twisting tension of the enameled wire, and the like.

Fig. 3A, Fig. 3C, Fig. 3E are the insertion loss and return loss of a traditional network transformer (Kate Electronics, model: KM24SG081 G) using a network analyzer (Keysight product, model: E5071-C). Figure 3B, Figure 3D, and Figure 3F use the same network analyzer to measure the insertion loss, return loss and characteristic impedance of the network transformer improved according to the present invention. The resulting waveform. The only difference between the improved network transformer and the conventional network transformer is that the signal leads on the primary side and the secondary side of the improved network transformer are partially twisted with each other. The contents shown in FIGS. 3A to 3F are only for illustration, but not for limiting the protection scope of the present invention.

當中，

代表該網路分析儀於差模（Differential mode）之中的系統阻抗，

代表從差分埠1到差分埠1的差模增益（即，回波損失），

代表從差分埠1到差分埠2的差模增益，

代表從差分埠2到差分埠1的差模增益（即，插入損失），

代表從差分埠2到差分埠2的差模增益。 The insertion loss and return loss of the improved network transformer and the traditional network transformer can be directly obtained through the signals measured by the differential port 1 and differential port 2 of the network analyzer, and the improved network transformer can be further calculated according to the following equations. The characteristic impedance of the network transformer and the traditional network transformer:

among,

represents the system impedance of the network analyzer in differential mode,

represents the differential mode gain (ie, return loss) from differential port 1 to differential port 1,

represents the differential mode gain from differential port 1 to differential port 2,

represents the differential mode gain (ie, insertion loss) from differential port 2 to differential port 1,

Represents the differential mode gain from differential port 2 to differential port 2.

As shown in Figures 3A~3B, under the condition of the same insertion loss, the improved network transformer can work in a higher frequency band than the traditional network transformer. As shown in Figures 3C~3D, under the condition of the same bandwidth, the improved network transformer has lower return loss than the traditional network transformer. As shown in Figures 3E~3F, in the case of the same characteristic impedance (for example, 100±15dB), the improved network transformer has a wider and higher operating frequency band than the traditional network transformer; The offset of characteristic impedance is large (unstable), but the offset of characteristic impedance of the modified network transformer is very small (very stable). Therefore, as can be seen from FIGS. 3A to 3F , the improved network transformer according to the present invention can additionally increase the line capacitance of the network transformer without changing the design mode of the network transformer, thereby making the characteristic impedance of the network transformer conform to a preset value characteristic impedance standard. In addition to this, modifying the network transformer according to the present invention may also improve other properties of the network transformer (eg, insertion loss, return loss, etc.).

4 illustrates a flowchart of a method of manufacturing a network transformer in accordance with some embodiments of the present invention. The content shown in FIG. 4 is only for illustrating the embodiment of the present invention, rather than for limiting the protection scope of the present invention.

4, a method 4 of manufacturing a network transformer may include the following steps: winding a plurality of enameled wires on a transformer core, and forming at least a first positive lead and at least a first positive lead on a first side of the network transformer a negative lead, and forming at least a second positive lead and at least a second negative lead on a second side of the network transformer (denoted as step 401 ); partially intertwisting the at least one first positive lead and the at least one second negative lead A first negative lead, and the at least one second positive lead and the at least one second negative lead are partially twisted with each other, so as to generate the network transformer and make the network transformer meet a predetermined characteristic in an operating frequency band Impedance criteria (labeled as step 403).

According to some embodiments, in the method 4 of manufacturing a network transformer, the intertwisted portion of the at least one first positive lead and the at least one first negative lead and the at least one second positive lead and the at least one second negative lead The twisted portion of the lead wire is accomplished according to at least one of the following: wire length, lay length and tension.

According to some embodiments, in the method 4 of manufacturing a network transformer, in addition to making the network transformer meet the predetermined characteristic impedance standard in the operating frequency band, the at least one first positive lead and the at least one first The intertwisted portion of the negative lead and the intertwisted portion of the at least one second positive lead and the at least one second negative lead also enable the network transformer to meet a predetermined insertion loss standard and a predetermined return in the operating frequency band. Wave loss criteria.

According to some embodiments, in addition to steps 401 and 403 , the method 4 for manufacturing a network transformer further includes the following steps: twisting the plurality of enameled wires, so that the plurality of enameled wires wound on the transformer core are twisted with each other.

According to some embodiments, in addition to steps 401 and 403, the method 4 of manufacturing a network transformer further includes the following steps: forming at least a first negative ground wire and at least a first positive ground wire on the first side of the network transformer a ground wire, and at least a second negative ground wire and at least a second positive ground wire are formed on the second side of the network transformer; the at least one first negative ground wire and the at least one a first positive ground wire, and the at least one second negative ground wire and the at least one second positive ground wire are partially or fully twisted with each other; and the at least one first positive lead wire and the at least one first negative ground wire The twisted portion of the leads and the twisted portion of the at least one first negative ground wire and the at least one first positive ground wire are twisted with each other, and the at least one second positive lead and the at least one second negative lead The twisted portion of the at least one second negative ground wire and the twisted portion of the at least one second positive ground wire are twisted with each other.

5 illustrates a flowchart of a method of manufacturing a network transformer in accordance with some embodiments of the present invention. The content shown in FIG. 5 is only for illustrating the embodiment of the present invention, rather than for limiting the protection scope of the present invention.

5, a method 5 of manufacturing a network transformer may include the following steps: winding a plurality of enameled wires on a transformer core, and forming at least a first positive lead and at least a first positive lead on a first side of the network transformer a negative lead, and forming a stranded wire on one side of the transformer core (marked as step 501 ); wrapping the stranded wire on a filter core and forming at least one wire on a second side of the network transformer second positive lead and at least one second negative lead (labeled as step 503 ); partially intertwist the at least one first positive lead and the at least one first negative lead, and partially intertwine the at least one second positive lead and the at least one second negative lead to generate the network transformer and make the network transformer meet a predetermined characteristic impedance standard in an operating frequency band (marked as step 505 ).

According to some embodiments, in the method 5 of manufacturing a network transformer, the intertwisted portion of the at least one first positive lead and the at least one first negative lead and the at least one second positive lead and the at least one second negative lead The twisted portion of the lead wire is accomplished according to at least one of the following: wire length, lay length and tension.

According to some embodiments, in the method 5 of manufacturing a network transformer, in addition to making the network transformer meet the predetermined characteristic impedance standard in the operating frequency band, the at least one first positive lead is connected to the at least one first positive lead. The intertwisted portion of the negative lead and the intertwisted portion of the at least one second positive lead and the at least one second negative lead also enable the network transformer to meet a predetermined insertion loss standard and a predetermined return in the operating frequency band. Wave loss criteria.

According to some embodiments, in addition to steps 501 , 503 and 505 , the method 4 of manufacturing a network transformer further includes the steps of: twisting the plurality of enameled wires with each other, so that the plurality of enameled wires wound on the transformer core are mutually intertwined. twist.

According to some embodiments, in addition to steps 501 , 503 and 505 , the method 5 of manufacturing a network transformer further includes the following steps: forming at least a first negative ground wire and at least a first negative ground wire on the first side of the network transformer. A positive ground wire, and at least one second negative ground wire and at least one second positive ground wire are formed on the second side of the network transformer; the at least one first negative ground wire is partially or completely twisted with each other. the at least one first positive ground wire, and the at least one second negative ground wire and the at least one second positive ground wire are twisted with each other partially or completely; and the at least one first positive lead wire with the at least one first ground wire The twisted portion of a negative lead and the twisted portion of the at least one first negative ground wire and the at least one first positive ground wire are twisted with each other, and the at least one second positive lead is twisted with the at least one second The twisted portion of the negative lead and the twisted portion of the at least one second negative ground wire and the at least one second positive ground wire are twisted with each other.

In some embodiments, the above steps of method 4 of manufacturing a network transformer may be performed by network transformer 1 , and the above steps of method 5 of manufacturing a network transformer may be performed by network transformer 2 . Each embodiment of the method 4 of manufacturing a network transformer will essentially correspond to a certain embodiment of the network transformer 1 . Therefore, even if each embodiment of the method 4 for manufacturing a network transformer is not described in detail above, those with ordinary knowledge in the technical field to which the present invention pertains can still directly understand the manufacturing of the network transformer 1 according to the above description of the network transformer 1 A non-detailed embodiment of method 4 of a circuit transformer. Likewise, each embodiment of the method 5 of making a network transformer will essentially correspond to a certain embodiment of the network transformer 2 . Therefore, even if each embodiment of the method 5 for manufacturing a network transformer is not described in detail above, those with ordinary knowledge in the technical field to which the present invention pertains can still directly understand how to manufacture the network transformer 2 based on the above description for the network transformer 2 A non-detailed embodiment of method 5 of a circuit transformer.

The above-mentioned embodiments are only examples to illustrate the present invention, but are not intended to limit the protection scope of the present invention. Any other embodiments produced by modifying, changing, adjusting and integrating the above-mentioned embodiments, as long as those with ordinary knowledge in the technical field to which the present invention pertains are not difficult to conceive, have been included within the protection scope of the present invention. The protection scope of the present invention is subject to the scope of the patent application.

As follows: 1, 2: Network transformer 10: Transformer core 22: Filter core W1, W2, W3, W4: enameled wire W11: First positive lead W12: The first negative ground wire W21: The first positive ground wire W22: first negative lead W31: Second positive lead W32: Second negative ground wire W41: Second positive ground wire W42: Second negative lead 4: Method of making a network transformer 401~403: Steps 5: Method of making a network transformer 501~505: Steps

FIG. 1 illustrates a schematic diagram of the architecture of a network transformer according to some embodiments of the present invention.

FIG. 2 illustrates a schematic diagram of the architecture of a network transformer according to some other embodiments of the present invention.

FIG. 3A illustrates a schematic diagram of the insertion loss of a conventional network transformer.

Figure 3B illustrates a schematic diagram of the insertion loss of a network transformer improved in accordance with the present invention.

FIG. 3C illustrates a schematic diagram of the return loss of a conventional network transformer.

Figure 3D illustrates a schematic diagram of the return loss of a network transformer improved according to the present invention.

FIG. 3E illustrates a schematic diagram of the characteristic impedance of a conventional network transformer.

Figure 3F illustrates a schematic diagram of the characteristic impedance of a network transformer improved according to the present invention.

4 illustrates a flowchart of a method of manufacturing a network transformer in accordance with some embodiments of the present invention.

Figure 5 illustrates a flow diagram of manufacturing a network transformer in accordance with certain other embodiments of the present invention.

none

1: Network transformer 10: Transformer core W1, W2, W3, W4: enameled wire W11: First positive lead W12: The first negative ground wire W21: The first positive ground wire W22: first negative lead W31: Second positive lead W32: Second negative ground wire W41: Second positive ground wire W42: Second negative lead

Claims (20)

A network transformer comprising: a transformer core; and A plurality of enameled wires are wound on the iron core of the transformer, and at least one first positive lead and at least one first negative lead are formed on a first side of the network transformer, and at least one first negative lead is formed on a second side of the network transformer a second positive lead and at least one second negative lead; Wherein, the at least one first positive lead and the at least one first negative lead are partially twisted with each other, and the at least one second positive lead and the at least one second negative lead are partially twisted with each other, so that the network transformer is in a Comply with a preset characteristic impedance (Characteristic Impedance) standard in the working frequency band. The network transformer of claim 1, wherein: the intertwisted portion of the at least one first positive lead and the at least one first negative lead and the interconnection of the at least one second positive lead and the at least one second negative lead The twisting part is done according to at least one of the following: wire length, lay length and tension. The network transformer of claim 1, wherein, in addition to making the network transformer meet the predetermined characteristic impedance standard in the operating frequency band, the at least one first positive lead and the at least one first negative lead have The twisted portion and the twisted portion of the at least one second positive lead and the at least one second negative lead also make the network transformer meet a preset insertion loss (Insertion Loss) standard and a preset in the operating frequency band Return Loss standard. The network transformer of claim 1, wherein the plurality of enameled wires wound on the transformer core are twisted with each other. The network transformer of claim 1, wherein: The enameled wires also form at least one first negative ground wire and at least one first positive ground wire on the first side of the network transformer, and at least one second negative ground wire on the second side of the network transformer and at least one second positive ground wire, the at least one first negative ground wire and the at least one first positive ground wire are partially or completely twisted with each other, and the at least one second negative ground wire and the at least one second The positive ground wires are partially or fully twisted; and The intertwisted portion of the at least one first positive lead and the at least one first negative lead and the intertwisted portion of the at least one first negative ground wire and the at least one first positive ground wire are also intertwisted with each other, and the The intertwisted portion of the at least one second positive lead and the at least one second negative lead and the intertwisted portion of the at least one second negative ground wire and the at least one second positive ground wire are also intertwisted with each other. A network transformer comprising: a transformer core; A plurality of enameled wires are wound on the transformer core, and at least one first positive lead and at least one first negative lead are formed on a first side of the network transformer, and a stranded wire is formed on one side of the transformer core ;as well as a filter core; wherein, the stranded wire is wound on the filter core, and at least one second positive lead and at least one second negative lead are formed on a second side of the network transformer; and Wherein, the at least one first positive lead and the at least one first negative lead are partially twisted with each other, and the at least one second positive lead and the at least one second negative lead are partially twisted with each other, so that the network transformer is in a A preset characteristic impedance standard is complied with within the working frequency band. The network transformer of claim 6, wherein: the intertwisted portion of the at least one first positive lead and the at least one first negative lead and the interconnection of the at least one second positive lead and the at least one second negative lead The twisting part is done according to at least one of the following: wire length, lay length and tension. The network transformer of claim 6, wherein, in addition to making the network transformer meet the predetermined characteristic impedance standard in the operating frequency band, the at least one first positive lead and the at least one first negative lead have The twisted portion and the twisted portion of the at least one second positive lead and the at least one second negative lead also make the network transformer meet a preset insertion loss standard and a preset return loss standard in the operating frequency band . The network transformer of claim 6, wherein the plurality of enameled wires wound on the transformer core are twisted with each other. The network transformer of claim 6, wherein: The enameled wires also form at least one first negative ground wire and at least one first positive ground wire on the first side of the network transformer, and at least one second negative ground wire on the second side of the network transformer and at least one second positive ground wire, the at least one first negative ground wire and the at least one first positive ground wire are partially or completely twisted with each other, and the at least one second negative ground wire and the at least one second The positive ground wires are partially or fully twisted; and The intertwisted portion of the at least one first positive lead and the at least one first negative lead and the intertwisted portion of the at least one first negative ground wire and the at least one first positive ground wire are also intertwisted with each other, and the The intertwisted portion of the at least one second positive lead and the at least one second negative lead and the intertwisted portion of the at least one second negative ground wire and the at least one second positive ground wire are also intertwisted with each other. A method of making a network transformer, comprising: A plurality of enameled wires are wound on a transformer core, and at least one first positive lead and at least one first negative lead are formed on a first side of the network transformer, and at least one first negative lead is formed on a second side of the network transformer. a second positive lead and at least one second negative lead; and Partially intertwisting the at least one first positive lead and the at least one first negative lead, and partially intertwisting the at least one second positive lead and the at least one second negative lead, to create the network transformer such that The network transformer complies with a predetermined characteristic impedance standard in a working frequency band. The method of claim 11, wherein the intertwisted portion of the at least one first positive lead and the at least one first negative lead and the intertwisted portion of the at least one second positive lead and the at least one second negative lead It is done according to at least one of the following: wire length, lay length and tension. The method of claim 11, wherein, in addition to making the network transformer meet the predetermined characteristic impedance standard in the operating frequency band, the at least one first positive lead and the at least one first negative lead are twisted together. The portion and the twisted portion of the at least one second positive lead and the at least one second negative lead also enable the network transformer to meet a predetermined insertion loss standard and a predetermined return loss standard within the operating frequency band. The method of claim 11, further comprising: twisting the plurality of enameled wires with each other, so that the plurality of enameled wires wound on the transformer core are twisted with each other. The method of claim 11, further comprising: At least one first negative ground line and at least one first positive ground line are formed on the first side of the network transformer, and at least one second negative ground line and at least one first ground line are formed on the second side of the network transformer Two positive grounding lines; The at least one first negative ground wire and the at least one first positive ground wire are partially or fully twisted with each other, and the at least one second negative ground wire and the at least one second positive ground wire are partially or completely twisted with each other ground wire; and The twisted portion of the at least one first positive lead and the at least one first negative lead and the twisted portion of the at least one first negative ground wire and the at least one first positive ground wire are twisted with each other, and The intertwisted portion of the at least one second positive lead and the at least one second negative lead and the intertwisted portion of the at least one second negative ground wire and the at least one second positive ground wire are intertwisted with each other. A method of making a network transformer, comprising: winding a plurality of enameled wires on a transformer core, forming at least one first positive lead and at least one first negative lead on a first side of the network transformer, and forming a stranded wire on one side of the transformer core; winding the stranded wire on a filter core, and forming at least one second positive lead and at least one second negative lead on a second side of the network transformer; and Partially intertwisting the at least one first positive lead and the at least one first negative lead, and partially intertwisting the at least one second positive lead and the at least one second negative lead, to create the network transformer such that The network transformer complies with a predetermined characteristic impedance standard in a working frequency band. The method of claim 16, wherein the intertwisted portion of the at least one first positive lead and the at least one first negative lead and the intertwisted portion of the at least one second positive lead and the at least one second negative lead It is done according to at least one of the following: wire length, lay length and tension. The method of claim 16, wherein, in addition to making the network transformer meet the predetermined characteristic impedance standard in the operating frequency band, the at least one first positive lead and the at least one first negative lead are twisted together. The portion and the twisted portion of the at least one second positive lead and the at least one second negative lead also enable the network transformer to meet a predetermined insertion loss standard and a predetermined return loss standard within the operating frequency band. The method of claim 16, further comprising: twisting the plurality of enameled wires with each other, so that the plurality of enameled wires wound on the transformer core are twisted with each other. The method of claim 16, further comprising: At least one first negative ground line and at least one first positive ground line are formed on the first side of the network transformer, and at least one second negative ground line and at least one first ground line are formed on the second side of the network transformer Two positive grounding lines; The at least one first negative ground wire and the at least one first positive ground wire are partially or fully twisted with each other, and the at least one second negative ground wire and the at least one second positive ground wire are partially or completely twisted with each other ground wire; and The twisted portion of the at least one first positive lead and the at least one first negative lead and the twisted portion of the at least one first negative ground wire and the at least one first positive ground wire are twisted with each other, and The intertwisted portion of the at least one second positive lead and the at least one second negative lead and the intertwisted portion of the at least one second negative ground wire and the at least one second positive ground wire are intertwisted with each other.

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