CN220543734U - Broadband audio transformer capable of effectively overcoming skin effect - Google Patents
Broadband audio transformer capable of effectively overcoming skin effect Download PDFInfo
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- CN220543734U CN220543734U CN202322206064.4U CN202322206064U CN220543734U CN 220543734 U CN220543734 U CN 220543734U CN 202322206064 U CN202322206064 U CN 202322206064U CN 220543734 U CN220543734 U CN 220543734U
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- 230000002500 effect on skin Effects 0.000 title claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 81
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 abstract description 12
- 238000010168 coupling process Methods 0.000 abstract description 12
- 238000005859 coupling reaction Methods 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of transformers, in particular to a broadband audio transformer capable of effectively overcoming skin effect, which comprises primary windings, secondary windings, an iron core and a framework, wherein the primary windings are provided with two groups, each group of wires of the primary windings is provided with 2 strands, the secondary windings are provided with one group of wires which are coupled with the primary windings, the iron core is used for magnetic conduction, and the primary windings and the secondary windings are wound on the framework and are used for fixing the iron core. The utility model has the following advantages: the multi-strand wire is adopted, the sum of the sectional areas is not smaller than the designed sectional area, the number of turns of the primary winding is not changed, the surface area of the wire is increased, and then the high-frequency loss caused by the skin effect is effectively overcome, so that the purpose of wide frequency band is realized; the number of the wires of the primary winding is multiplied, the surface area of the wires is enlarged, the coupling degree with the secondary winding is improved, and the tight coupling of the primary winding and the secondary winding is realized.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to a wideband audio transformer capable of effectively overcoming skin effect.
Background
Skin effect refers to a phenomenon in which when there is an alternating current or electromagnetic field in a conductor, the current distribution inside the conductor is uneven and the current concentrates on the "skin" portion of the conductor. The current becomes practically small inside the wire and the current is concentrated in a thin layer on the outer surface of the wire. As a result, the resistance of the wire increases, causing its loss power to also increase. The current wideband audio transformer is shown in fig. 1, a primary winding is made by winding a single strand of wire, high-frequency loss caused by skin effect cannot be overcome, the surface area is a fixed value, the coupling degree of the primary winding and a secondary winding is poor, and obvious ringing is generated when a 1kHz square wave is actually tested.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a wideband audio transformer that effectively overcomes the skin effect, and the transformer can effectively overcome the high frequency loss caused by the skin effect, thereby achieving the purpose of wideband, and effectively improving the coupling degree between the primary winding and the secondary winding.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows: a wideband audio transformer effective to overcome skin effects, comprising:
the primary winding is provided with at least two groups, each group of wires of the primary winding is provided with at least 2 strands, and each group of the primary winding is wound in parallel by adopting multiple strands;
a secondary winding, said secondary winding having at least one set of windings coupled to said primary winding;
the iron core is used for magnetic conduction;
the primary winding and the secondary winding are wound on the framework and are wound on the iron core, and the framework is used for fixing the iron core.
Preferably, the sum of the "cross-sectional areas" of the wires of the primary winding is not smaller than the designed "cross-sectional area".
Preferably, the sum of the turns of at least 2 of the wires is the same as the design turns of the primary winding formed by 1 of the wires.
After adopting the structure, the utility model has the following advantages:
(1) According to the method, a single strand of wire is expanded to 2 strands or more strands, the sum of the sectional areas of the stranded wires is equal to or larger than the designed sectional area, the number of the wires is expanded without changing the number of design turns of the primary winding, the surface area of the wires can be effectively increased, and then the high-frequency loss caused by the skin effect is effectively overcome, so that the purpose of wide frequency band is realized;
(2) According to the method, the number of the wires of the primary winding is multiplied, so that the surface area of the wires is enlarged, the coupling degree of the primary winding and the secondary winding is effectively improved relative to the coupling degree of the secondary winding, the tight coupling of the primary winding and the secondary winding of the audio transformer is realized, and the 1kHz square wave is actually tested without obvious ringing.
The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present utility model will become apparent by reference to the drawings and the following detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a conventional audio transformer winding.
Fig. 2 is a schematic diagram of an audio transformer winding of the present utility model.
Fig. 3 is a cross-sectional view of a coil of the present utility model.
Fig. 4 is a schematic diagram of the wiring of the winding of the audio transformer of the present utility model.
Fig. 5 is a second schematic diagram of the winding wiring of the audio transformer of the present utility model.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Referring to fig. 2-3, the wideband audio transformer for effectively overcoming skin effect comprises a primary winding, a secondary winding, an iron core and a framework, wherein the primary winding is provided with two groups of wires, each group of wires of the primary winding is provided with 2 strands, the secondary winding is provided with one group of wires which are coupled with the primary winding, the iron core is used for magnetic conduction, and the primary winding and the secondary winding are wound on the framework and are used for fixing the iron core.
The conventional audio transformer primary winding wire is usually physically formed from a single wire strand, and the utility model extends the single wire strand to 2 strands, wherein the sum of the "cross-sectional areas" of the 2 strands is equal to or greater than the designed "cross-sectional area".
The number of the wires is expanded without changing the design turns of the primary winding, so that the surface area of the wires is effectively increased, and then the high-frequency loss caused by skin effect is effectively overcome, thereby realizing the purpose of wide frequency band.
The conventional primary winding of the audio transformer is usually formed by a wire, the surface area of the wire of the primary winding is a fixed value, so that the best coupling degree between the primary winding and the secondary winding is difficult to achieve under the premise that a 1kHz square wave is actually tested to find obvious ringing.
The method and the device realize the enlargement of the surface area of the wires by utilizing the multiple expansion of the wire strands of the primary winding, and effectively improve the coupling degree relative to the secondary winding, so that the tight coupling of the primary winding and the secondary winding of the audio transformer is realized, and the actual test of 1kHz square wave does not have obvious ringing.
As shown in the coil section in fig. 3, the iron core is disposed in the middle of the skeleton, two wires included in fig. 2 are wound on the skeleton near the innermost layer of the iron core, a primary winding is formed by double-wire parallel winding, an insulating layer is disposed on the outer side of the primary winding, a secondary winding included in fig. 2 is wound on the outer side of the insulating layer, a middle tap is disposed in the secondary winding, an insulating layer is disposed on the outer side of the secondary winding, and finally two wires included in fig. 2 are wound on the outer side of the insulating layer, and a primary winding is formed again by double-wire parallel winding.
An audio transformer winding wiring schematic as shown in fig. 4 is used for a valve push-pull amplifier/balanced input transformer.
The audio transformer winding wiring schematic shown in fig. 5 is used for a valve single-ended amplifier and an unbalanced input/output signal transmission transformer.
The traditional audio transformer is compared with the actual measurement data of the utility model (the comparison test is carried out by taking two transformers with identical parameters and different manufacturing modes as examples).
Square wave test, results are shown in table 1 below:
table 1 square wave test results
The bandwidth test results are shown in table 2 below:
TABLE 2 Bandwidth test results
The broadband audio transformer of the utility model realizes the enlargement of the surface area of the lead by utilizing the doubling expansion of the number of the lead strands of the primary coil, and the coupling degree of the broadband audio transformer is effectively improved relative to the secondary coil. This also achieves "close coupling" of the primary and secondary windings of the audio transformer, with no significant "ringing" of the actual test 1kHz square wave "
The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown throughout. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.
Claims (3)
1. A wideband audio transformer effective to overcome skin effects, comprising:
the primary winding is provided with at least two groups, each group of wires of the primary winding is provided with at least 2 strands, and each group of the primary winding is wound in parallel by adopting multiple strands;
a secondary winding, said secondary winding having at least one set of windings coupled to said primary winding;
the iron core is used for magnetic conduction;
the primary winding and the secondary winding are wound on the framework and are wound on the iron core, and the framework is used for fixing the iron core.
2. A wideband audio transformer effective to overcome skin effects as recited in claim 1, wherein: the sum of the 'sectional areas' of the wires of the primary winding is not smaller than the designed 'sectional area'.
3. A wideband audio transformer effective to overcome skin effects as recited in claim 1, wherein: the sum of the turns of at least 2 of the wires is the same as the design turns of the primary winding formed by 1 of the wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322206064.4U CN220543734U (en) | 2023-08-16 | 2023-08-16 | Broadband audio transformer capable of effectively overcoming skin effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322206064.4U CN220543734U (en) | 2023-08-16 | 2023-08-16 | Broadband audio transformer capable of effectively overcoming skin effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220543734U true CN220543734U (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322206064.4U Active CN220543734U (en) | 2023-08-16 | 2023-08-16 | Broadband audio transformer capable of effectively overcoming skin effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220543734U (en) |
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2023
- 2023-08-16 CN CN202322206064.4U patent/CN220543734U/en active Active
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