TW201409499A - Transformer and method and electrical connector - Google Patents

Abstract

A transformer includes a magnetic core (3) and a plurality of coils winding around the magnetic core. The coils include a first set of coils (1) and a second coils (2) each comprising four coils. The magnetic core includes a first part (31) and a second part (32). The first set of coils wind around the first part of the magnetic core. The second set of coils wind around the second part of the magnetic core. The coils could be easily wind around the magnetic core by an automatic winding machine.

Description

Transformer, manufacturing method thereof and electrical connector

The present invention relates to a transformer, and more particularly to a winding form of a transformer; the present invention also relates to a method of manufacturing a transformer, and more particularly to a method of winding a transformer; the invention also relates to an electrical connector, and more particularly to an electrical connector using the aforementioned transformer .

For prior art, please refer to US Patent Application Publication No. US2007/0040645 and Taiwan New Patent Specification TWM409577U.

Taiwan's new patent specification TWM409577U discloses a connector comprising a transformer and a choke. The transformer is provided with a first pair of wires (a first group of enameled wires) and a second pair of wires (a second group of enameled wires), the first pair of wires being formed by combining a first conductive element (enamel wire) and a third conductive element (enamel wire). The second pair of wires are formed by the second conductive element (enamel wire) and the fourth conductive element (enamel wire). The first pair of wires are wound separately from the second pair of wires through the transformer. In this patent, two pairs of wire pairs need to be wound twice to complete, and it is not convenient to use the automated winding of the automatic machine. In addition, the two pairs of enameled wires disclosed in this patent are separately wound around the entire ring of the transformer core, and the distance between the adjacent two sets of enameled wires is large, resulting in a large capacitance between the lines, in high-speed transmission, for example, a 10 Gbit/s transmission network, a transformer. The electrical performance is not easy to pass the standard test.

Therefore, in response to the above problems, it is necessary to modify the prior art.

It is an object of the present invention to provide a transformer having improved electrical performance.

To achieve the foregoing objective, the transformer of the present invention comprises a magnetic core and a first set of enameled wires and a second set of enameled wires wound around the magnetic core, the first set of enameled wires and the second set of enameled wires each comprising four enameled wires, the magnetic core comprising In the first part and the second part, the first set of enameled wires are only wound around the first part of the magnetic core, and the second set of enameled wires are only wound around the second part of the magnetic core. The first group of enameled wires and the second group of enameled wires are respectively wound around different parts of the transformer, which increases the distance between the two groups of enameled wires, reduces the inter-line capacitance, increases the stray capacitance, and improves the electrical characteristics of the transformer, especially the return loss. (RL), insertion loss (IL), common mode to common mode attenuation (CM-to-CM Attenuation) performance.

Another object of the present invention is to provide a method of manufacturing the above transformer.

To achieve the foregoing objects, a method of manufacturing a transformer of the present invention includes the following steps:

(1) providing a toroidal core having a central through hole;

(2) providing an enameled wire set, the enamelled wire set comprising four enameled wires stranded together;

(3) winding the enamel wire group around the toroidal core in a direction penetrating through the center through hole, and forming a first portion and a second portion which are sequentially wound around the toroidal core, and have a gap between the first portion and the second portion Wound in the middle section of the toroidal core;

(4) breaking the enameled wire set in the middle section, thereby forming a first enameled wire group and a second enameled wire group respectively wound around the toroidal magnetic core, and arranging the respective wire ends of each group of enameled wires;

(5) The first group of enameled wires and the second group of enameled wires are respectively twisted to form a primary coil input and output end of the transformer, a secondary coil input and output end, and a center tap of the primary coil and the secondary coil.

It is still another object of the present invention to provide an electrical connector using the above transformer.

To achieve the foregoing objective, the electrical connector of the present invention includes an insulative housing and a filter module disposed in the insulative housing, the filter module includes a winding transformer and a patch common mode suppressor, and the winding transformer includes a magnetic core and a first set of enameled wires and a second set of enameled wires wound around the magnetic core, the first set of enameled wires and the second set of enameled wires each comprising at least four enameled wires, the magnetic core comprising a first portion and a second portion, the first group of enameled wires only Wound around the first part of the core, the second set of enameled wires is only wound around the second part of the core. The electrical performance of the electrical connector can be improved by changing the winding mode of the transformer.

Referring to FIG. 1 to FIG. 3 together, a transformer 100 according to a first embodiment of the present invention includes a magnetic core 3 and a first group of enameled wires 1 and a second group of enameled wires 2 wound around the magnetic core 3. The first group of enameled wire 1 and the second group of enameled wire 2 each comprise four enameled wires.

The magnetic core 3 comprises a first portion 31 and a second portion 32, the first set of enamel wires 1 being wound only around the first portion 31 of the magnetic core 3, and the second set of enamel wires 2 being wound only around the second portion 32 of the magnetic core 3. A portion of the first group of enameled wires 1 wound around the core 3 is twisted and twisted together, and a portion of the second group of enameled wires 2 wound around the core 3 is twisted and twisted together. The first group of enameled wires 1 are identical in composition to the second group of enameled wires 2, and each includes four enameled wires of different colors Nn (gold), Bb (blue), Rr (red), and Gr (green). After the first group of enameled wire 1 and the second group of enameled wire 2 are stranded together, the enameled wires of the same color are respectively stranded together to form the primary coil, the secondary coil and the center tap of the transformer (second figure and Three pictures). The magnetic core 3 is a toroidal core, and the first portion 31 and the second portion 32 are opposite sides of the toroidal core.

The first figure is a state diagram when the first group of enameled wires 1 and the second group of enameled wires 2 are ready to be twisted together, the first group of enameled wires 1 and the second group of enameled wires 2 are wound in the same direction, so that the first group of enameled wires 1 The first wire head NBRG and the second wire head nbrg of the second group of enameled wire 2 are located on the upper side of the magnetic core, the second wire head nbrg of the first group of enameled wire 1 and the first wire end NBRG of the second group of enameled wire 2 are located at the magnetic core 3 The underside.

Referring to the fourth figure, a transformer 200 according to a second embodiment of the present invention, wherein the first group of enameled wires 1 and the second group of enameled wires 2 are not yet twisted together. The circuit diagram of the transformer 200 is the same as the third diagram of the first embodiment. The first group of enameled wires 1 and the second group of enameled wires 2 of the transformer 200 are twisted together with the second figure of the first embodiment. The difference between the transformer 200 and the transformer 100 is that the winding cores of the two sets of enamel wires of the transformer 200 are opposite in direction, so that the first wire NBRG of the first group of enamel wires 1 and the first wire NBRG of the second group of enamel wires 2 are located at the core On the upper side, the second thread head nbrg of the first group of enameled wires 1 and the second wire head nbrg of the second group of enameled wire 2 are located on the lower side of the magnetic core 3.

Compared with the prior art eight sets of enameled wire separated type windings wound on the magnetic core, the first embodiment and the second embodiment reduce the line capacitance of the enameled wire, increase the distributed capacitance of the winding, and improve the transformer. Electrical performance, especially insertion loss and return loss. The advantage of the first embodiment over the second embodiment is that it facilitates the winding automation. Since the winding directions of the first group of enameled wires 1 and the second group of enameled wires 2 are the same, a group of enameled wires can be continuously wound by an automatic winding machine. The first portion 31 and the second portion 32 of the core 3 are then severed at an intermediate position to form a first set of enameled wire 1 and a second set of enameled wire 2. On the contrary, the second embodiment requires that the enameled wire be wound on the magnetic core in both the forward and reverse directions, and it is not convenient to achieve automatic winding.

Next, a method of manufacturing the transformer 100 in the first embodiment will be described, which includes the following steps:

(1) providing a toroidal core 3, which has a central through hole 30;

(2) providing an enameled wire set, the enamelled wire set comprising four enameled wires stranded together, the enameled wire set is wound into a ring shape, and the wire end is pulled therefrom;

(3) causing an automatic winding machine to repeatedly pass the wire end of the enameled wire set through the central through hole 30 of the toroidal core, winding the toroidal core 3 on one side of the central through hole, forming the first part of the enameled wire set, and then pulling the wire end Forming a fixed intermediate portion that is not wound around the toroidal core, and then continuing to wind the end of the toroidal core 3 on the opposite side of the central through hole 30 through the central through hole in the same direction to form the enameled wire group Two parts;

(4) breaking the enamel wire group in the middle portion to form a first group of enamel wires 1 and a second group of enamel wires 2 respectively wound around the toroidal core, and the first group of enamel wires 1 and the second group of enamel wires 2 are formed with buttons Winding the first wire NBRG and the second wire nbrg formed in sequence, and arranging the wire ends of each group of enameled wires, the first wire R of the first group of enameled wires 1 and the first wire of the second group of enameled wires 2 The heads R are intertwined to form an RR, and the second thread g in the first group of enameled wires 1 and the second wire g in the second group of enameled wires 2 are intertwined to form a gg, and the first wire N of the first group of enameled wires 1 is The first wire N of the second group of enameled wires 2 is intertwined to form a NN, and the second wire b of the first group of enameled wires 1 and the second wire b of the second group of enameled wires 2 are intertwined to form a bb, and the first enameled wire is The first wire head G and the second wire head r of 1 and the first wire head G and the second wire head r of the second group of enameled wire 2 are mutually entangled to form GGrr, and the first wire head B in the first enamel wire 1 is The second wire head n and the first wire end B and the second wire head n of the second group of enameled wires 2 are mutually entangled to form BBnn.

Please refer to the second and third figures together, where RR and gg are the input and output ends of the transformer primary coil, NN and bb are the input and output terminals of the transformer secondary coil, GGrr is the center tap of the primary coil, and BBnn is the secondary. The center of the coil is tapped.

Referring to FIG. 5 to FIG. 7 , an electrical connector 500 includes an insulative housing 5 and a filter module 50 disposed in the insulative housing 5 . The filter module 50 includes a winding transformer 501 and a chip common mode suppressor 502 connected to the winding transformer 501. The winding transformer 501 adopts the transformer 100 or the transformer 200 described above. The filter module comprises two rows of conductive strips 503, 504 on the circuit board. The input terminal RR, the output end gg and the center tap GGrr of the primary coil of the winding transformer 501 are respectively soldered on the conductive sheet 503, and the winding transformer 501 is used. The input terminal NN, the output terminal bb, and the center tap BBnn of the stage coil are respectively soldered to the conductive sheet 504. The filter module 50 includes five winding transformers 501 and five common mode suppressors 502, wherein four winding transformers 501 are electrically connected to four common mode suppressors 502 for transmitting four signal channels, respectively. A winding transformer 501 and another common mode suppressor 502 are electrically connected for common mode signal detection. Referring to the seventh figure, the winding transformer 501 between each signal channel has a capacitor 505 connected in parallel, the common mode suppressor 502 in the second channel has a capacitor 505 connected in parallel, and the second channel is connected in parallel with the third channel. There are two capacitors 505. The arrangement of the capacitors 505 facilitates the improvement of the electrical performance of the electrical connector 500.

1. . . The first group of enameled wires

2. . . The second group of enameled wires

100, 200. . . transformer

3. . . Magnetic core

30. . . Center through hole

31. . . first part

32. . . the second part

5. . . Insulating body

50. . . Filter module

500. . . Electrical connector

501. . . Winding transformer

502. . . Common mode suppressor

503, 504. . . Conductive sheet

505. . . capacitance

N, B, R, G. . . First line head

n, b, r, g. . . Second line head

The first figure is a front view of the transformer of the first embodiment of the present invention, in which the enameled wire groups are not yet twisted.

The second drawing is a front view of the transformer of the first embodiment of the present invention.

The third figure is a circuit diagram of the transformer shown in the second figure.

The fourth figure is a front view of a transformer according to a second embodiment of the present invention, in which the enameled wire groups are not yet twisted.

Figure 5 is an exploded view of the electrical connector of the present invention with the enameled wire on the transformer omitted.

Figure 6 is a perspective view of the circuit board module of the electrical connector shown in Figure 5.

Figure 7 is a circuit diagram of the electrical connector shown in Figure 5.

1. . . The first group of enameled wires

2. . . The second group of enameled wires

100. . . transformer

3. . . Magnetic core

30. . . Center through hole

31. . . first part

32. . . the second part

N, B, R, G. . . First line head

n, b, r, g. . . Second line head

Claims (10)

A transformer comprising a magnetic core and a first set of enameled wires and a second set of enameled wires wound around the magnetic core, the first set of enameled wires and the second set of enameled wires each comprising four enameled wires, wherein the magnetic core comprises a first portion and a second portion In part, the first group of enameled wires are only wound around the first portion of the magnetic core, and the second group of enameled wires are only wound around the second portion of the magnetic core. The transformer of claim 1, wherein the first group of enameled wires are twisted and twisted together at a portion of the core, and the second group of enameled wires are twisted and twisted together at a portion of the core. The transformer of claim 2, wherein the first group of enameled wires is the same as the second group of enameled wires, and each comprises four enameled wires of different colors. The transformer of claim 3, wherein the first group of enameled wires and the enameled wires stranded together in the second group of enameled wires are respectively dispersed, and the enameled wires of the same color are twisted together to form a primary coil of the transformer, Stage coil and center tap. The transformer of claim 1, wherein the magnetic core is a toroidal core, and the first portion and the second portion are opposite sides of the toroidal core. A method of manufacturing a transformer, comprising the steps of:
(1) providing a toroidal core having a central through hole;
(2) providing an enameled wire set, the enamelled wire set comprising four enameled wires stranded together;
(3) winding the enamel wire group around the toroidal core in a direction penetrating through the center through hole, and forming a first portion and a second portion which are sequentially wound around the toroidal core, and have a gap between the first portion and the second portion Wound in the middle portion of the toroidal core;
(4) breaking the enamel wire group in the middle portion, thereby forming a first enamel wire group and a second enamel wire group respectively wound around the toroidal magnetic core, and arranging the wire ends of each group of enamel wires;
(5) The first group of enameled wires and the second group of enameled wires are respectively twisted to form a primary coil input and output end of the transformer, a secondary coil input and output end, and a center tap of the primary coil and the secondary coil. The method for manufacturing a transformer according to claim 6, wherein in the step (2), the provided enameled wire set is wound into a ring shape, and the wire end is pulled out therefrom, and in the step (3), an automatic winding machine is The wire end of the enameled wire set repeatedly penetrates the central through hole of the toroidal core, and the toroidal core is wound on one side of the central through hole to form a first portion of the enameled wire group, and the pulling wire head forms a fixed intermediate portion not wound around the toroidal core Then, the wire ends are further wound in the same direction through the central through hole, and the annular magnetic core is sequentially wound on the opposite side of the central through hole to form the second portion of the enamelled wire group, and the wrapped enameled wire group is rolled from the circular wire. Cutting. The method for manufacturing a transformer according to claim 7, wherein the first enameled wire group and the second enameled wire group formed in the step (3) are formed with a first wire end and a second wire end formed in a winding sequence, and The four enameled wires of the first enameled wire set are the first to fourth enameled wires, the four enameled wires of the second enameled wire set are the fifth to eighth enameled wires, and in the step (5), the first wire of the first enameled wire is first and the first The first wire end of the five enameled wire is used as the input end of the primary side coil, and the second wire end of the second enameled wire and the second wire end of the sixth enameled wire are used as the output end of the primary side coil, and the second wire end of the first enameled wire is used. The first thread of the second enameled wire, the second wire of the fifth enameled wire and the first wire of the sixth enameled wire are used as the center tap, and the first wire of the third enameled wire and the first wire of the seventh enameled wire are used as the first wire. The input end of the primary coil, the second wire of the fourth enameled wire and the second wire of the eighth enameled wire are used as the output end of the primary coil, and the second wire of the third enameled wire and the first wire of the fourth enameled wire The second and seventh enameled wire The first thread of the eighth head as enameled center tap. An electrical connector includes an insulative housing and a filter module disposed in the insulative housing, the filter module includes a winding transformer and a patch common mode suppressor, wherein the winding transformer includes a magnetic core and is wound around The first group of enameled wires of the magnetic core and the second group of enameled wires, the first group of enameled wires and the second group of enameled wires each comprise at least four enameled wires, the magnetic core comprising a first portion and a second portion, the first group of enameled wires being only wound around the magnetic wire The first portion of the core, the second set of enameled wires is only wound around the second portion of the core. The electrical connector of claim 9, wherein the filter module comprises five transformers and five common mode suppressors, wherein four transformers are electrically connected to four common mode suppressors for transmitting four One signal channel, another transformer and another common mode suppression electrical connection for common mode signal detection.