RU2242061C2 - Stranded conductor and its manufacturing process - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: proposed stranded conductor designed for signal transfer in audio frequency band from readers to amplifying and/or reproducing domestic and professional devices is manufactured in process involving production of flat metal strands and coating of stranded conductor surface with insulation. For the purpose use is made of at least three flat metal strands, and additional insulating layer is disposed between flat surfaces of adjacent strands prior to coating stranded conductor surface with insulation; end sections of strands are brought out beyond insulation layers and strands are interconnected at each end section of conductor; the latter is made of at least three flat metal strands 11, 12, 13 whose flat surfaces are facing each other with insulating layers 9 and 11 inserted between flat surfaces 5-6 and 7-8 of adjacent strands 1-2 and 2-3; end sections 11, 12, and 13 of strands 1-3 brought out beyond insulating layers 4 and 9-10 are interconnected through solder layers 14 and 15.

EFFECT: reduced distortion of electric signal in audio frequency band when passed through proposed stranded conductor.

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Description

The invention relates to the field of electrical engineering and relates to the transmission of an electrical signal in the audio frequency range from reading devices to amplifying and / or reproducing devices of household and professional appliances.

Known mounting wire tape brands LMPPM-100, containing a multilayer copper flat core (see, for example, TU No. 16-705.360-84).

Strip radio-frequency cables are known, which are two copper tapes with a thickness of 0.15 mm and a width of up to 7.5 mm, arranged longitudinally, with fluoroplastic insulation and a sheath of light-stabilized polyethylene (see, for example, D.Ya. Galperovich, A.A. Pavlov, NN Khrennikov Radio-frequency cables, M .: Energoatomizdat, 1990, p. 249 and 250).

Strip cables are known, containing two metal flat tapes, between which an insulating tape is located with edges protruding beyond them, having a double-sided transverse corrugation with a depth equal to twice the thickness of the metal tape, and a sheath in the form of a tape winding and a monolithic layer (see, for example, Auth. USSR Certificate No. 599285, MKI N 01 B 7/08, publ. 25.03.78, BI No. 11).

A disadvantage of the known metal flat tapes (cores), which is manifested when transmitting an electrical signal in the audio frequency range from readers to amplifying and / or reproducing devices, is their insufficient consumer properties.

The objective of the invention is to increase the consumer properties of a conductive metal flat tape (core) when transmitting an electrical signal in the audio frequency range from readers to amplifying and reproducing devices.

This problem is solved by achieving a technical result, which consists in reducing the distortion of the electrical signal in the sound frequency range when it passes through a conductive flat core.

The claimed technical result is achieved in a conductive conductor containing metal flat conductors, an insulation layer on the surface of the core made of at least three flat metal conductors facing a flat surface to each other, in which an insulation layer is placed between the flat surfaces of adjacent conductors, the ends of the conductors the conductors are connected to each other, and the ratio of the width of the conductor to its thickness The busbar is selected in the range from 110 to 290, in particular, the flat conductors in the core are installed parallel to each other.

A known method of manufacturing two and three-wire cables intended primarily for electronics and computer technology, which consists in sequentially applying insulation to metal flat conductors in the form of tapes and sheaths by wrapping insulated conductors with insulating tape, in which the insulation tapes are placed longitudinally between the insulated conductors and wrap them around the conductors in the process of applying the tape of the sheath by applying the latter to the tape located longitudinally (see example, Auth. svid. USSR №602999, IPC H 01 B 13/26, publ. 04.15.78, BI №14).

The disadvantage of this method, which manifests itself in the transmission of an electrical signal in the audio frequency range from readers to amplifying and / or reproducing devices, is the insufficiently high consumer properties of metal flat conductors (conductors).

The objective of the invention is to increase the consumer properties of conductive flat metal conductors (conductors) when transmitting an electrical signal in the audio frequency range from readers to amplifying and / or reproducing devices.

This problem is solved by achieving a technical result, which consists in reducing the distortion of the electrical signal in the sound frequency range when it passes through a conductive flat core.

The claimed technical result is achieved in a method of manufacturing a conductive core, including the manufacture of flat metal conductors, applying insulation to the surface of the core, in which at least three flat metal conductors are taken, and before applying insulation to the surface of the core, an insulation layer is additionally placed between the flat surfaces of adjacent conductors, and the end sections of the conductors extend beyond the location of the insulation layers and at each of the end sections of the core conductors are connected between by myself.

In the technique, as applied to a strip cable, such a technique as placing an insulation layer between metal conductors is known (see, for example, German Patent No. 1900678, NKI 21 from 31/08, 1969), and there is no information about the achieved reduction in the distortion of the electrical signal in the audio frequency range as it passes through the strip cable. The claimed technical result, which consists in reducing the distortion of the electrical signal in the audio frequency range, is unattainable both in the strip cable and the mounting wire of the LMPPM-100 brand, nevertheless is achieved in the proposed conductive flat core made of at least three flat metal conductors, facing a flat surface to each other, with an insulation layer placed between the flat surfaces of adjacent conductors, the end sections of the conductors in which are outside insulation, moreover, at each of the end sections of the conductor, the conductors are interconnected, the transmission of an electrical signal occurs simultaneously across all conductors, and this reduces the effect of the skin effect known from the literature on the transmitted signal (see, e.g., I.V. Savelyev. General Physics Course, Book 2, Electricity and Magnetism, M .: Astrel Publishing House LLC, ACT Publishing House LLC, 2001, p. 233) - one of the significant factors affecting the distortion of an electrical signal, all other things being equal. With the same cross section of the conductive core, the minimum dimensions of which are determined by the purpose and corresponding current loads, the effect of the skin effect on the electrical signal in the sound frequency range is less in the case of the inventive core due to the larger surface area of the conductive conductors compared with the same indicator of the known conductive core strip cable, which is a single-layer copper tape, and the well-known residential installation wire LMPPM-100, which is a multilayer flat a copper tape with electrical contact of all flat surfaces of conductors that are in contact with each other; with the same cross-sectional area of the strip cable and the proposed conductive core, due to a decrease in the external surface area of the conductive core, its resistance to external electromagnetic fields increases.

The invention is illustrated by graphic materials, where in Fig.1 shows a General view of the proposed conductive core (longitudinal vertical section); figure 2 is the same as in figure 1 (transverse vertical section); figure 3 is a schematic illustration of a sound reproducing device with connecting wires based on the proposed conductive core; figure 4 presents the image of the connection node of the conductive core with the connector of the reading (amplifying, reproducing) device when transmitting a signal from the reading to the amplifying (from amplifying to reproducing) device.

The core contains metal flat conductors 1-3, an insulation layer 4 is made on the outer surface of the core, in addition, between the flat surfaces 5-6 and 7-8 of the adjacent conductors 1-2 and 2-3, respectively, each of which has a width A and a thickness In, the insulation layer 9 and 10 is placed (FIGS. 1 and 2), while the end sections 11, 12 and 13 of the conductors 1-3 brought outside the insulation layers 4 and 9-10 are interconnected by soldering layers 14 and 15 ( figure 1); they can be given a shape that is responsive to the shape of the connector of the connection node of the amplifying and / or reproducing device of household and / or professional equipment (not shown in Figs. 1-3). Figure 3 schematically shows the connection of the reader 16 with an amplifying device 17 and a sound reproducing device 18 using wires 19-20 and 21-22, respectively, each of which is made of two cores 23-24, 25-26 and 27-28, respectively 29-30, structurally executed according to Figs. 1 and 2. Fig. 4 schematically shows a joint assembly of the end sections 11-13 of conductors 1-3 (interconnected by soldering layers 14 and 15, outside the insulating layers 4 and 9-10 ) conductive core 23 of the wire 19 with a socket 31 of the transition element 32, inserted Go to the socket 33 of the connector 34 of the device 16, to the second socket 35 of the connector 34 in a similar way using the adapter 36 connected conductive core 24 wires 19, while the sockets 33 and 35 in the connector 34 are separated by a layer of insulator 37. The connection of the opposite end sections of the conductive wires 23 and 24 with the device 17 is made according to the scheme similar to that shown in figure 4; in the same way, the connection of cores 25-26 (wire 20) with devices 16, 17, cores 27-28 (wire 21) and 29-30 (wire 22) with devices 17, 18 (not shown in Fig. 4) is made.

The invention was carried out as follows.

Example 1. From a sheet of copper of the MOB brand, a flat copper strip of rectangular cross section 0.2 mm thick and 30 mm wide was obtained by rolling, three conductors (1-3) 3 meters long were cut from the obtained tape each (with a ratio of width A of each conductor to its thickness B, equal to 150, FIG. 2), the conductors 1-3 were arranged one above the other parallel to each other (FIG. 1), deviated from each end of the package thus obtained by 2 cm and between the flat surfaces 5-6 and 7- 8 adjacent conductors 1-3 placed an insulating tape 9 and 10 (Fig. 1) 32 mm wide and thick th 100 microns made of fluoroplastic, then the end sections 11, 12 and 13 of conductors 1-3 protruding beyond the location of the above-mentioned insulating fluoroplastic tape 9 and 10 were rigidly interconnected by soldering layers 14 and 15 (Fig. 1), on the outer surface the conductor thus obtained was applied, with the exception of the end sections 11-13, an insulation coating 4 by winding an insulation tape 100 μm thick made of fluoroplastic. In a similar way, three more identical conductors were made, a total of 4 wires were made, two of which were used as the connecting wire of the left channel 19 between the Sony TA-FA50ES stereo amplifier (17) and one of the speakers of the Sony SS-F7ES stereo speaker system (18), the other two cores were likewise used as the connecting wire (20) of the right channel between the stereo amplifier (17) and the second column of the stereo-acoustic system (18).

Example 2. The same as in example 1, but from a sheet of copper of grade M1 a copper flat ribbon of rectangular section 0.1 mm thick and 200 mm wide was obtained, six conductors 3 meters long were cut from the obtained ribbon each (with the ratio of the width of the conductor to its thickness 200), the insulating tape was chosen 21 mm wide and 30 microns thick.

Example 3. The same as in example 1, but from a sheet of copper of the MOB brand, a copper flat ribbon of rectangular section 0.1 mm thick and 25 mm wide was obtained, six conductors 3 meters long were cut from the obtained ribbon each (with the ratio of the width of the conductor to its thickness 250), the insulating tape was selected with a width of 27 mm and a thickness of 30 microns.

Example 4. The same as in example 1, but a copper flat ribbon of rectangular cross section 0.2 mm thick and 20 mm wide was obtained from an MOB copper sheet, three conductors 3 meters long were cut from the resulting tape (with respect to the width of the conductor to its thickness of 100), the insulating tape was selected with a width of 22 mm and a thickness of 100 μm.

Example 5. The same as in example 1, but from a sheet of copper of the MOB brand, a flat copper strip of rectangular section 0.1 mm thick and 30 mm wide was obtained by rolling, three conductors 3 meters long were cut from the resulting tape (with the ratio the width of the conductor to its thickness 300), the insulating tape was chosen 32 mm wide and 33 microns thick.

Were also tested for the manufacture of conductive conductors, in particular metal conductors, along with copper, silver-plated copper tapes, tinned copper tapes; as dielectrics insulating conductors in a conductor, dielectrics with a relative dielectric constant of not more than 3.5, including paper, capacitor paper, film or tape made of polyethylene, polyethylene terephthalate-polyethylene, as well as multilayer combinations of these materials; as dielectrics insulating the outer surface of the conductive core, a coating of polyethylene or polyethylene terephthalate-polyethylene, polyvinyl chloride, cotton or other threads, multilayer combinations of the above materials; the connection protruding beyond the location of the insulation layers of the metal conductors in the core, along with soldering, can be performed by the known method of spot welding or by any other known method providing reliable electrical contact between them (not shown in Figs. 1-3).

In addition, a connecting wire was made from two conductive flat conductors obtained by the technology described in example 1, from conductors 0.03 mm thick and 4.5 mm wide, with which a reader 16 was connected, for which a CD player was used (CD-ROM) brand Sony CDP-XA20ES, and an amplifying device 17, which was used as the previously mentioned stereo amplifier brand Sony TA-FA50ES.

Tests of the resulting conductive wires 23-24 (wire 19), 25-26 (wire 20), 27-28 (wire 21) and 29-30 (wire 22) were carried out according to the method described in the journal AUDIO MUSIC No. 3, 2001 (s .64-69).

Similar tests were also carried out using Musical Fidelity CD PRE 24 brand CD player as a reader 16, Musical Fidelity A3CR brand amplifier amplifier 17, and Dinaudio Contour 3.0 speaker systems 18.

For comparison, under the same conditions, the well-known flat wire of the Blue Heaven Rev.2 brand manufactured by NORDOST was taken as the connecting wire (see, for example, the NORDOST CORPORATION catalog, 420 Franklin ST., Framingham, MA 01702, USA).

The test results are shown in the table.

A comparative analysis of the test results presented in the table indicates that the samples of the proposed conductive core described in examples 1-3 demonstrated the transmission of an electric signal in the sound frequency range with high reliability and compared with the known and non-recommended samples shown in examples 4- 6, reducing distortion of the electrical signal in the audio frequency range as it passes through a conductive flat conductor.

The invention is applicable in household and professional audio, video, computer and other equipment for transmission with minimal distortion of the electrical signal in the audio frequency range.

Claims (3)

1. A conductive core containing metal flat conductors, an insulation layer on the surface of the core, characterized in that the core is made of at least three flat metal conductors facing a flat surface to each other, while an insulation layer is placed between the flat surfaces of adjacent conductors, end sections of the conductors are outside the location of the insulation layers and at each of the end sections of the core, the conductors are interconnected, and the ratio of the width of the conductor to its thickness is selected in the interval e from 110 to 290. 2. The conductive core according to claim 1, characterized in that the flat conductors in the core are installed parallel to each other. 3. A method of manufacturing a conductive core, including the manufacture of metal flat conductors, applying insulation to the surface of the core, characterized in that at least three flat metal conductors are taken and, before applying insulation to the surface of the core, an insulation layer is additionally placed between the flat surfaces of adjacent conductors, and the terminal sections of the conductors are brought out of the limits of the location of the insulation layers and at each of the end sections of the conductor, the conductors are interconnected.

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