TW202032587A - Filtering transformer device capable of achieving better high-frequency filtering characteristic - Google Patents

Abstract

A filtering transformer device comprises an axle core and a lead bundle unit wound around the axle core. The lead bundle unit includes a primary first lead bundle having a lead, a secondary first lead bundle having a lead, a primary second lead bundle having a lead, and a secondary second lead bundle having a lead, wherein the primary first lead bundle and the secondary second lead bundle are twisted with each other into a twisted section, and the primary second lead bundle and the secondary first lead bundle are twisted with each other into another twisted section, and the two twisted sections are wound around the axle core. Each lead includes a core made of a conductive material, and an insulated outer enclosure enclosing the core. Each lead of each lead bundle is electrically connected to a plurality of electrodes with different potentials with the end of its core, respectivley.

Description

Filter transformer

The invention relates to a transformer coil, in particular to a filter transformer device.

If the filter transformer device is installed on the computer motherboard or interface card, it mainly filters the high-frequency noise of the signal on the motherboard or interface card to reduce non-ideal effects caused by high-frequency noise, such as electromagnetic interference. (electro-magnetic interference, EMI).

1 and 2, the conventional filter transformer device 1 includes a toroidal magnetic core 11, and a wire bundle 12 wound around the toroidal magnetic core 11, wherein the wire bundle 12 is composed of four wires twisted with each other. , To form a mutual inductance coupled primary side inductor and secondary side inductor, so as to achieve the function of filtering the input signal. Although the conventional filtering and transforming device 1 can also filter high-frequency input signals (above 1MHz), as the number of high-frequency electronic components of the electronic device increases, the high-frequency signal on the circuit board increases. The non-ideal effects caused by high-frequency signals are becoming more and more serious. Therefore, the requirements for high-frequency filtering characteristics of filter transformer devices will become higher and higher and need to be improved.

Therefore, the purpose of the present invention is to provide a filter transformer device with better high-frequency filter characteristics.

Therefore, the present invention provides a filtering and transforming device, which includes a shaft core and a wire harness unit wound around the shaft core. The wire harness unit includes a primary-side first wire bundle with a wire, and a wire bundle with a wire. Secondary-side first wiring harness, a primary-side second wiring harness with a wiring, and a secondary-side second wiring harness with a wiring, the primary-side first wiring harness and the secondary-side second wiring harness After twisting each other into a twisted section, and the primary-side second wire bundle and the secondary-side first wiring bundle are twisted with each other into another twisted section, the two twisted sections are wound around the shaft core, wherein, Each wire has a core made of a conductive material, and an outer covering that covers the core and is insulated, the primary side first wire bundle, the primary side second wire bundle, and the secondary side first wire bundle , And each wire of the secondary-side second wire bundle is electrically connected to a plurality of electrodes with different equipotentials at the ends of the cores.

The effect of the present invention is that the first wire bundle on the primary side and the second wire bundle on the secondary side twist to each other by a twisted section, and the second wire bundle on the primary side and the first wire bundle on the secondary side are mutually twisted. After twisting another twisted section, the two twisted sections wind the shaft core to increase the self-inductance of the coil inductance and the magnetic flux of mutual inductance, and have better high-frequency filtering characteristics.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

Referring to FIGS. 3 and 4, a first embodiment of the filtering and transforming device 2 of the present invention includes a shaft core 21 and a wire harness unit 22 wound around the shaft core 21.

The shaft core 21 can be a strip-shaped or ring-shaped iron core, and can also be a strip-shaped or ring-shaped magnetic core, but is not limited to this. In this embodiment, the shaft core 21 is a ring-shaped magnetic core.

The wiring harness unit 22 includes a primary-side first wiring harness 23, a secondary-side second wiring harness 24, a primary-side second wiring harness 25, and a secondary-side first wiring harness 26. The wire harness 23 and the primary-side second wire harness 25 respectively have two wires 28 that abut each other and have their axes parallel to each other. The secondary-side second wire harness 24 and the secondary-side first wire harness 26 each have a wire 28. Each wire 28 has a core portion 281 made of conductive material, and an outer covering portion 282 (as shown in FIG. 5) that covers the core portion 281 and is insulated. In this embodiment, each wire 28 is An enameled wire, and the cross-sectional area of the core portion 281 of each wire 28 is the same, but not limited to this.

4, the primary side first wire harness 23 and the secondary side second wire harness 24 are twisted to each other to form a twisted section 27 (as shown in FIG. 4), the primary side second wire harness 25 and the The first wire harness 26 on the secondary side is first twisted into another twisted section 27 (as shown in FIG. 4), and then the two twisted sections 27 are wound around the shaft core 21 in parallel without winding the shaft core 21 The end section of each wire 28 is exposed to its core 281 to electrically connect a plurality of electrodes with different potentials.

A first end section 231 of the primary-side first wire harness 23 is electrically connected to a first electrode (not shown), and a second end section 232 of the primary-side first wire harness 23 is electrically connected to a potential lower than the first electrode A second electrode (not shown) of an electrode, a third end section 241 of the secondary-side second wire bundle 24 is electrically connected to a seventh electrode (not shown), the secondary-side second wire bundle 24 A fourth end section 242 is electrically connected to an eighth electrode (not shown) with a lower potential than the seventh electrode, and a fifth end section 251 of the primary-side second wire bundle 25 is electrically connected to a third electrode (not shown) (Shown), a sixth end section 252 of the primary-side second wire harness 25 is electrically connected to a fourth electrode (not shown) that has a lower potential than the third electrode, and a second-end section of the secondary-side first wire harness 26 The seven terminal section 261 is electrically connected to a seventh electrode (not shown), and an eighth terminal section 262 of the secondary-side first wire harness 26 is electrically connected to an eighth electrode (not shown in the figure) which has a lower potential than the seventh electrode ). The electrical connection between each wire harness and each electrode can be conductive welding or through-through connection, but is not limited to this. In this embodiment, the electrical connection between the wire harness and the electrode is conductive welding .

Referring to FIG. 6, the equivalent circuit diagram of the first embodiment of the filtering and transforming device 2 of the present invention. The first wire bundle 23 wound on the primary side of the shaft core 21 forms a pair of inductors on the primary side, and is wound on the shaft core 21 The second wire bundle 25 on the primary side forms another pair of inductances on the primary side, and the first wire bundle 26 is wound on the secondary side of the core 21 to form an inductor on the secondary side, which is wound on the secondary side of the core 21 The second wire bundle 24 forms another inductance on the secondary side. The second end section 232 and the fifth end section 251 can form a central tap on the primary side. The third end section 241 and the eighth end section 254 can form the center tap of the secondary side, and use the total number of turns (number of windings) of the primary side coil inductance and the total of the equivalent coil inductance of the secondary side. The number of turns is the same, and the input signal is filtered, especially when the input signal is a high-frequency input signal (above 1MHz), there is a better filtering function.

7 and 8, when the first embodiment of the present invention and the conventional filtering and transforming device 1 input signals with different frequencies, it can be seen from FIG. 7 that the insertion loss of the first embodiment of the present invention ( The unit is decibel) for different input signal frequency performance (square marked broken line), are all smaller than the conventional filter transformer device 1, especially in the case of higher frequencies, the greater the difference in insertion loss. As shown in Fig. 8, it can be seen that the echo loss of the first embodiment of the present invention (square marked broken line) has greater performance on different input signal frequencies, except for 1MHz, which is greater than that of the conventional filter transformer 1 (diamond marked broken line). ) The performance of different input signal frequencies proves that in this embodiment, the primary side first wire bundle 23 and the secondary side second wire bundle 24 are twisted with each other, and the primary side second wire bundle 25 and the secondary side After the first wire bundle 26 is twisted to each other, the two twisted twisted sections 27 are wound around the shaft core 21 in parallel to strengthen the self-inductance of the coil inductance and the magnetic flux of mutual inductance to achieve better high-frequency filtering effect. .

Referring to FIG. 9, a second embodiment of the filtering and transforming device of the present invention is similar to the first embodiment. The difference is that the primary side second wire bundle 25 of the filtering and transforming device of the second embodiment has only one wire. 28, but still the primary side first wire bundle 23 and the secondary side second wire bundle 24 are twisted to each other, and the primary side second wire bundle 25 and the secondary side first wire bundle 26 are twisted to each other, Then, the two twisted twisted sections 27 are wound around the shaft core 21 in parallel, so that it can still achieve good filtering characteristics when inputting high-frequency input signals. Similarly, in another different embodiment, the primary-side first wire bundle 23 may have only one wire 28.

Referring to FIG. 10, a third embodiment of the filtering and transforming device of the present invention is similar to the first embodiment, and the difference lies in the primary side first wire bundle 23 and the primary side of the filtering and transforming device of the third embodiment The second wire bundle 25 has only one wire 28, but the primary side first wire bundle 23 and the secondary side second wire bundle 24 are twisted with each other. The primary side second wire bundle 25 and the secondary side After the first wire bundle 26 is twisted to each other, the two twisted twisted sections 27 are wound around the shaft core 21 in a parallel manner, so that good filtering characteristics can still be achieved when high-frequency input signals are input.

To sum up, the filter transformer device of the present invention twists the wire bundles on the primary side with different numbers of wires on the shaft core 21 and twists the wire bundles on the secondary side accordingly. Then the two twisted twisted sections 27 are wound in parallel on the shaft core 21 to form the primary side coil inductance and the secondary side coil inductance when the signal is input, which can filter the input signal, especially the input signal is The high frequency input signal (above 1MHz) has excellent filtering characteristics, so the creative purpose of the present invention is indeed achieved.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope of the patent for the present invention.

1: Conventional filter transformer 11: Magnetic core 12: Wire harness 2: Filtering transformer 21: Axle 22: Wire harness unit 23: The first wire harness on the primary side 231: First end section 232: second end section 24: Secondary side second wire harness 241: third end section 242: Fourth end section 25: Primary side second wire harness 251: Fifth end section 252: The sixth end section 26: Secondary side first wire harness 261: Seventh end segment 262: Eighth end segment 27: Twisting section 28: Wire 281: Core 282: Outsourcing Department

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a three-dimensional schematic diagram illustrating a conventional filter transformer device; Figure 2 is a three-dimensional schematic diagram illustrating the A wire bundle composed of a single four-wire twisting of the conventional filtering and transforming device; Figure 3 is a three-dimensional schematic diagram illustrating a first embodiment of the filtering and transforming device of the present invention; Figure 4 is a three-dimensional schematic diagram illustrating the first embodiment of the present invention. The two twisted sections of an embodiment; Fig. 5 is a cross-sectional view illustrating a wire structure of the first embodiment; Fig. 6 is an equivalent circuit diagram to assist in explaining the first embodiment of the filter transformer device of the present invention; 7 is a broken line diagram illustrating the comparison of the insertion loss of the first embodiment and the conventional filtering and transforming device at different frequencies; Fig. 8 is a broken line diagram illustrating the first embodiment and the conventional filtering and transforming device Comparison of the return loss at different frequencies; Figure 9 is a three-dimensional schematic diagram illustrating the two twisted sections of a second embodiment of the filter transformer device of the present invention; and Figure 10 is a three-dimensional schematic diagram illustrating the filter transformer of the present invention The two twisted sections of a third embodiment of the device.

2: Filtering transformer

21: Axle

22: Wire harness unit

23: The first wire harness on the primary side

24: Secondary side second wire harness

25: Primary side second wire harness

26: Secondary side first wire harness

27: Twisting section

Claims (3)

A filter transformer device for electrically connecting a plurality of electrodes with different potentials, comprising: a shaft core; and a wire harness unit, including a primary side first wire harness with a wire, and a secondary side second wire with a wire A wiring harness, a primary-side second wiring harness with a wiring, and a secondary-side second wiring harness with a wiring, the primary-side first wiring harness and the secondary-side second wiring harness are twisted with each other into one Twisted section, and after the primary side second wire bundle and the secondary side first wire bundle are twisted with each other to form another twisted section, the two twisted sections are wound around the shaft core, wherein each wire has A core part made of a conductive material, and an outer covering part covering the core part and insulating, the primary side first wire bundle, the primary side second wire bundle, the secondary side first wire bundle, and the two Each wire of the second wire bundle on the secondary side is electrically connected to a plurality of electrodes with different equipotentials at the ends of the cores. The filtering and transforming device according to claim 1, wherein the primary-side first wire bundle or the primary-side second wire bundle further has a wire, and the primary-side first wire bundle or the primary-side first wire bundle with two wires The two wires of the two wire bundles abut each other. The filtering and transforming device according to claim 1, wherein the primary-side first wire bundle and the primary-side second wire bundle each further have a wire, and the two wires of the primary-side first wire bundle abut each other, And the two wires of the second wire harness on the primary side abut against each other.

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