TW202032588A - Filtering and voltage converting device for increasing magnetic flux of self-inductance and mutual-inductance of a coil inductor to achieve better high-frequency filtering characteristic - Google Patents

Abstract

Provided is a filtering and voltage converting device for being electrically connected to multiple electrodes having different electric potentials, which comprises an axle core and a conductive wire bundling unit wound on the axle core. The conductive wire bundling unit includes a first conductive wire bundle and a second conductive wire bundle that are twisted with each other. The first conductive wire bundle has two conductive wires that are attached to each other. The second conductive wire bundle has a conductive wire. Each conductive wire is provided with a core portion made of conductive material and an insulated sheath portion that encloses the core portion. Each conductive wire of the first conductive wire bundle and the second conductive wire bundle is electrically connected to multiple electrodes having different electric potentials through the end of its core portion.

Description

Filter transformer

The invention relates to a voltage transformation device, in particular to a filter voltage transformation 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 good high frequency filter characteristics.

Therefore, a filter transformer device of the present invention includes a shaft core and a wire bundle unit wound around the shaft core. The wire bundle unit includes a first wire bundle and a first wire bundle twisted with the first wire bundle. Two wire bundles, the first wire bundle has two wires abutting each other, the second wire bundle has a wire, each wire has a core made of a conductive material, and a core that covers the core and is insulated In the outer covering part, the wires of the first wire bundle and the second wire bundle are respectively electrically connected to a plurality of electrodes with different equipotentials at the ends of their cores.

The effect of the present invention is to increase the self-inductance and mutual inductance of the coil inductance by twisting the two wires of the first wire bundle that are close to each other with the wires of the second wire bundle and then winding them around the shaft core. The magnetic flux has 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 first wiring harness 23, a second wiring harness 24, a third wiring harness 25, and a fourth wiring harness 26, wherein the first wiring harness 23 and the third wiring harness 25 Each has two wires 27 abutting each other and having parallel axes. The second wire bundle 24 and the fourth wire bundle 26 each have a wire 27, and each wire 27 has a core 271 made of a conductive material, and An outer covering part 272 covering the core part 271 and insulating. The first wire bundle 23, the second wire bundle 24, the third wire bundle 25, and the fourth wire bundle 26 are twisted with each other and then wound around the shaft core 21, and two of the first wire bundle 23 The first end section 231 and the second end section 232 of the wire, the third end section 241 and the fourth end section 242 of the wire 27 of the second wire bundle 24, the fifth end of the second wire 27 of the third wire bundle 25 The section 251, the sixth end section 252, and the seventh end section 261 and the eighth end section 262 of the wire 27 of the fourth wire bundle 26 expose the core 271 for electrical connection (that is, conductive welding, or Piercing and connecting) a plurality of electrodes with different potentials. In this embodiment, each wire 27 is an enameled wire, and the cross-sectional area of the core 271 of each wire 27 is the same, but it is not limited thereto.

The first end section 231 of the first wire bundle 23 is electrically connected to the first electrode, and the second end section 232 of the first wire bundle 23 is electrically connected to the second electrode having a lower potential than the first electrode. The third end section 241 is electrically connected to the third electrode, the fourth end section 242 of the second wire bundle 24 is electrically connected to the fourth electrode of the third electrode at a lower potential, and the fifth end section 251 of the third wire bundle 25 is electrically connected. Is connected to the fifth electrode, the sixth end section 252 of the third wire bundle 25 is electrically connected to the sixth electrode having a lower potential than the fifth electrode, and the seventh end section 261 of the fourth wire bundle 26 is electrically connected to the seventh electrode. The eighth end section 262 of the fourth wire harness 26 is electrically connected to the eighth electrode having a lower potential than the seventh electrode.

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 shaft core 21 forms a pair of inductances on the primary side, and is wound on the first side of the shaft core 21 The three wire bundles 25 form another pair of inductances on the primary side, the second wire bundle 24 wound around the core 21 forms an inductance on the secondary side, and the fourth wire bundle 26 wound around the core 21 forms a secondary side Another inductor, the second end section 232 is electrically connected to the fifth end section 251 to form a center tap on the primary side, and the fourth end section 242 is electrically connected to the seventh end section 261 to form a center tap on the secondary side. , And borrow the total number of turns of the coil inductance on the primary side (the number of winding turns) is the same as the total number of turns of the equivalent coil inductance on the secondary side, and filter the input signal, especially the input signal is a high-frequency input signal (1MHz The above) has 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 first wire bundle 23 and the third wire bundle 25 have two wires 27 that are close to each other and have their axes parallel to each other. 23. The second wire bundle 24, the third wire bundle 25, and the fourth wire bundle 23 are twisted to each other to strengthen the self-inductance of the coil inductance and the magnetic flux of the mutual inductance to achieve a better high-frequency filtering effect.

Referring to FIG. 9, a second embodiment of the filter transformer device of the present invention is similar to the first embodiment. The difference is that the filter transformer device of the second embodiment lacks the fourth wire bundle 26 and has no secondary In other words, in the second embodiment, the number of turns of the second wire bundle 24 wound on the shaft core 21 is the same as the number of turns of the second wire bundle 24 of the first embodiment plus the The number of turns of the fourth wire bundle 26 makes the coil inductance of the primary side and the coil inductance of the secondary side equivalent to the first embodiment, and achieves good filtering characteristics when inputting high-frequency input signals.

10, a third embodiment of the filter transformer device of the present invention is similar to the first embodiment, the difference is that the filter transformer device of the third embodiment lacks the third wire bundle 25 and the fourth The wire bundle 26 has no primary and secondary side center taps. In other words, the first wire bundle 23 and the second wire bundle 24 of the third embodiment are twisted with each other and wound around the shaft core 21, And the number of turns is twice the number of turns of the first wire bundle 23 of the first embodiment, so that the inductance of the primary side coil and the inductance of the secondary side coil are equivalent to the first embodiment, and the input high-frequency input signal At the same time, good filtering characteristics are achieved.

In summary, the filter transformer device of the present invention has a structure in which a plurality of wire bundles with different numbers of wires are wound around the shaft core 21 to form a coil inductance on the primary side and a coil on the secondary side when a signal is input. The coil inductance can filter the input signal, especially when the input signal is a high-frequency input signal (above 1MHz), it has excellent filtering characteristics, so it does achieve the creative purpose of the present invention.

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 231: First end section 232: second end section 24: Second wire harness 241: third end section 242: Fourth end section 25: Third wire harness 251: Fifth end section 252: The sixth end section 26: Fourth wire harness 261: Seventh end segment 262: Eighth end segment 27: Wire 271: Core 272: 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. A wire bundle unit 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 filtering and transforming device of the present invention; Fig. 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 return loss at different frequencies; Fig. 9 is a three-dimensional schematic diagram illustrating a wire harness unit of a second embodiment of the filter transformer device of the present invention; and Fig. 10 is a three-dimensional schematic diagram illustrating the filter transformer of the present invention A wire harness unit of a third embodiment of the device.

2: Filtering transformer

21: Axle

22: Wire harness unit

23: The first wire harness

24: Second wire harness

Claims (3)

A filter transformer device for electrically connecting a plurality of electrodes with different potentials, comprising: a shaft core; and a wire bundle unit, wound around the shaft core and including a first wire bundle, and a first wire bundle with each other Twisted second wire bundle, the first wire bundle has two wires abutting each other, the second wire bundle has a wire, each wire has a core made of a conductive material, and a core that covers the core And an insulated outer cover, the wires of the first wire bundle and the second wire bundle are respectively electrically connected to a plurality of electrodes with different equipotentials at the ends of their cores. The filtering and transforming device according to claim 1, wherein the wire harness unit further includes a third wire bundle twisted with the first wire bundle and the second wire bundle, and the third wire bundle has two phases with each other. Adjacent wires, and each wire of the third wire bundle is electrically connected to a plurality of electrodes with different equipotentials at the end of its core. The filtering and transforming device according to claim 2, wherein the wire harness unit further includes a fourth wire bundle twisted with the first wire bundle, the second wire bundle, and the third wire bundle, and the first wire bundle The four-wire bundle has a wire, and the end of its core is electrically connected to two of the electrodes with different equipotentials.

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