CN211670033U - Cable combining power and communication - Google Patents

Abstract

The utility model relates to a cable conductor technical field, concretely relates to combine cable of electric power and communication, include: the high-power insulated wire harness comprises a first wire harness group, a second wire harness group, a third wire harness group and a fourth wire harness group, wherein a plurality of high-power insulated wires are arranged in the first wire harness group; a plurality of data signal lines are arranged in the second wire harness group, and a first shielding layer covers the second wire harness group; a high-power insulated wire is arranged in the third wire harness group; a plurality of low-power insulated wires are arranged in the fourth bundle group, and a first inner sheath is wrapped outside the fourth bundle group; the first wire harness group, the second wire harness group, the third wire harness group and the first wire harness group are twisted together around a common center and are covered by a second shielding layer; and a cable sheath covers the outside of the second shielding layer. The utility model discloses, through combining electric power and communication conductor in single cable, simplify the connected mode between driving system and control system, reduced construction cost.

Description

Cable combining power and communication

Technical Field

The utility model relates to a cable conductor technical field, concretely relates to combine cable of electric power and communication.

Background

Communication transmission lines typically contain low voltage electrical signals that are susceptible to electrical interference and noise, which can result in loss of signal integrity and resultant data loss. Therefore, the drive unit often communicates with the motor via a dedicated communication cable. Many implementations require multiple cables for separate power transmission and communication, thereby increasing the cost and complexity of the design by automatically doubling the number of cables and connectors required.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cable that combines electric power and communication through with electric power and communication conductor combination in single cable, simplifies the connected mode between driving system and control system, has reduced the construction cost.

In order to achieve the above object, the utility model provides a following technical scheme: a cable that combines power and communications, comprising: the high-power insulated wire harness comprises a first wire harness group, a second wire harness group, a third wire harness group and a fourth wire harness group, wherein a plurality of high-power insulated wires are arranged in the first wire harness group; a plurality of data signal lines are arranged in the second wire harness group, and a first shielding layer covers the second wire harness group; a high-power insulated wire is arranged in the third wire harness group; a plurality of low-power insulated wires are arranged in the fourth bundle group, and a first inner sheath is wrapped outside the fourth bundle group; the first wire harness group, the second wire harness group, the third wire harness group and the first wire harness group are twisted together around a common center and are covered by a second shielding layer; and a cable sheath covers the outside of the second shielding layer.

Preferably, the high-power insulated wires in the first harness group comprise a first power wire, a second power wire, a third power wire and a grounding wire; and the conductor part diameter of any high-power insulated wire is larger than the conductor diameters of the data signal wire and the low-power insulated wire.

Preferably, the plurality of data signal lines in the second wire harness group are twisted together around the same center, and a first adhesive tape wrapping layer and a first metal tape layer are sequentially wrapped between the first shielding layers from inside to outside; a filler is arranged between the first adhesive tape coating layer and the gaps of the data signal lines; the first shielding layer is of a metal woven mesh structure, and a second inner sheath wraps the outside of the first shielding layer.

Preferably, a second metal tape layer and a third shielding layer are sequentially coated between the plurality of low-power insulated wires in the fourth harness group and the first inner sheath from inside to outside.

Preferably, a low-resistance friction layer is arranged between the cable sheath and the second shielding layer.

Preferably, a wire harness wrapping layer and a third metal belt layer are sequentially arranged between the second shielding layer and the first wire harness group, between the second wire harness group and between the second shielding layer and the fourth wire harness group from inside to outside.

The utility model discloses beneficial effect does: the cable may have a reduced cross-section while providing high voltage power via the first, second and third insulated conductors, respectively, to carry three phase electrical power in the first bundle. The reduced cross-section advantageously improves the bit error rate for low voltage data signals via the fourth and fifth insulated conductors, respectively, for data communication in the second wire harness set. And the third wire harness group and the fourth wire harness group are respectively used as isolation groups between the first wire harness group for transmitting power and the second wire harness group for providing communication, so that physical isolation is realized, the power current transmission of the cable can be realized, the data communication capacity is increased, and the reliability of data communication is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the cable of the present invention;

fig. 2 is a cross-sectional view of a cable according to the present invention;

fig. 3 is a cross-sectional view of a second harness set of the present invention;

fig. 4 is a cross-sectional view of a fourth wiring harness set of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1, 2, 3, 4, a cable for combining power and communication includes: the high-power insulated wire harness comprises a first wire harness group 60, a second wire harness group 62, a third wire harness group 64 and a fourth wire harness group 66, wherein a plurality of high-power insulated wires are arranged in the first wire harness group 60; a plurality of data signal lines are arranged in the second wire harness group 62, and a first shielding layer 86 covers the second wire harness group 62; a high-power insulated wire is arranged in the third wire harness group 64; a plurality of low power insulated wires are provided within the fourth bundle group 66, and a first inner sheath 94 is wrapped around the outside of the fourth bundle group 66; the first, second, third and fourth wire harness groups 60, 62, 64 and 66 are twisted together about a common center 68 and covered by a second shielding layer 74; the second shield layer 74 is externally covered with a cable sheath 78.

In the above arrangement, the interior of the cable 22 is divided into four wire harness groups according to the function of the conducting wire, namely: a first wire harness set 60 for the power delivery group, a second wire harness set 62 for data communications, a third wire harness set 64 for ground, and a fourth wire harness set 66 for power control. First, second and third insulated conductors 24, 26 and 28, respectively, for transmitting three-phase power and having a high voltage with respect to a communication signal, are provided in the first harness group 60. A low-voltage fourth insulated conductor 30 and a fifth insulated conductor 32 for data communication are provided in the second wire harness group 62, respectively. Each insulated conductor has a copper conductor core surrounded by an electrically insulating jacket of low dielectric constant. The third and fourth wire harness groups 64 and 66 are respectively disposed on opposite sides of the second wire harness group 62. The third bundle 64 includes a sixth insulated conductor for providing protective grounding and the fourth bundle 66 includes seventh and eighth insulated conductors 36 and 38 for providing motor braking control.

The first, second, third and fourth wire harness sets 60, 62, 64 and 66, respectively, are twisted together about a common center 68. The common center 68 may be a virtual center line or a filler object, such as: fibrillated and/or flexible materials, and may have a low dielectric constant.

Example two:

any of the first insulated conductor 24, the second insulated conductor 26, and the third insulated conductor 26 has a larger diameter for carrying a large current than the fourth insulated conductor 30 and the fifth insulated conductor 32 in the second wire harness set 62 providing the low voltage communication signal. In addition, the seventh and eighth insulated conductors 36, 38 in the fourth bundle 66 have a larger diameter than the fourth and fifth insulated conductors 30, 32, respectively, to provide motor brake control current. The sixth insulated conductor 34 in the third wire harness group 64 may be equivalent to any of the first, second and third insulated conductors 24, 26 and 28, respectively, in the first wire harness group 60.

Example three:

the fourth and fifth insulated conductors 30 and 32 of the second wire harness set 62 for data communications are twisted together about a common center and may also be covered by one or more communication subassembly layers to achieve various effects. The fourth insulated conductor 30, like the other insulated conductors in the cable 22, may include a conductor portion 30a, which may be copper, and an electrically insulated portion 30b surrounding the conductor portion 30 a. In one aspect, fourth insulated conductor 30 and fifth insulated conductor 32 may each be covered by a tape wrap 80, with a filler 82 contained below tape wrap 80. The filler 82 may be, for example, PP, and "twisted pairs" may be used to substantially maintain the circular geometry of the twisted fourth and fifth insulated conductors 30 and 32, respectively, to further minimize noise and interference with the communication signals by ensuring improved impedance matching with the electronics in the encoder and drive units. The filler 82 substantially fills the remaining space formed by twisting the fourth and fifth insulated conductors 30 and 32, respectively, together. At the same time, the density of the filler 82 can be controlled to ensure the degree of twisting, thereby improving the data transmission characteristics. The tape wrap 80 may in turn be covered by a metal tape 84 or foil, which metal tape 84 or foil may be aluminized to attenuate high frequency electrical noise. The metal strip 84 may provide sufficient overlap to result in complete coverage. The metal strip 84 may in turn be covered by a first shielding layer 86. The first shielding layer 86 may be a woven copper mesh for minimizing EMI. In turn, the first shield layer 86 may be covered by a second inner jacket 88, which second inner jacket 88 may be, for example, a TPE or PVC material that is extruded over the communication subassembly core to protect the second wire harness set 62.

Example four:

the fourth bundle group 66 may include a seventh insulated conductor 36 and an eighth insulated conductor 38, respectively, for providing motor braking control. Seventh insulated conductor 36 and eighth insulated conductor 38 may be twisted together about a common center and may be covered by one or more motor control brake subassembly layers to achieve various effects. The seventh insulated conductor 36, like the other insulated conductors in the cable 22, may include a conductor portion 36a, which may be copper, and an electrically insulating portion 36b surrounding the conductor portion 36 a. In one aspect, the seventh and eighth insulated conductors 36 and 38, respectively, may be covered with a metal tape 90 or aluminum foil, and may be aluminized to attenuate high frequency electrical noise. The metal strip 90 may in turn be covered by an electrical shield 92. The electrical shield 92 may be a braided copper shield for minimizing EMI. In turn, the electrical shield 92 may be covered by a tape wrap 94, the tape wrap 94 being used to house the motor control brake subassembly. The twisted together fourth bundle group 66 may protrude through the cable 22 in a circular geometry.

Example five:

the electrical shield 74 may be covered by a low resistance friction band 76, which low resistance friction band 76 may allow movement between the inner cable body and the cable jacket. The low-resistance friction band 76 may in turn be covered by a cable jacket 78, which cable jacket 78 may be, for example, a thermoplastic elastomer TPE or polyvinyl chloride PVC material that is extruded over the cable core to protect the cable 22.

Example six:

the first, second, third and fourth wire harness groups 60, 62, 64 and 66 may be individually twisted together to be covered in one or more layers to achieve various effects. The first, second, third and fourth wire harness groups 60, 62, 64 and 66, respectively, may be covered by a core wrap 70, which may be, for example, a polyester or polypropylene PP tape, a nylon adhesive. Or similar materials, allow for some flexibility and mobility of the first, second, third and fourth wire harness sets 60, 62, 64 and 66, respectively. The core wrap 70 may optionally include a filler, such as PP, to substantially maintain the circular geometry of the cable 22. The core wrap 70 may in turn be covered by a metal tape 72 or foil, which may also be aluminized to attenuate high frequency electrical noise. Metal strip 72 may be applied in a manner to provide sufficient overlap for complete coverage. The metal strip 72 may be covered by a second shield layer 74. The second shielding layer 74 may be implemented by a woven copper mesh for minimizing electromagnetic interference.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. A cable that combines power and communications, comprising:

the high-power insulated wire harness comprises a first wire harness group, a second wire harness group, a third wire harness group and a fourth wire harness group, wherein a plurality of high-power insulated wires are arranged in the first wire harness group; a plurality of data signal lines are arranged in the second wire harness group, and a first shielding layer covers the second wire harness group; a high-power insulated wire is arranged in the third wire harness group; a plurality of low-power insulated wires are arranged in the fourth bundle group, and a first inner sheath is wrapped outside the fourth bundle group; the first wire harness group, the second wire harness group, the third wire harness group and the first wire harness group are twisted together around a common center and are covered by a second shielding layer; and a cable sheath covers the outside of the second shielding layer.

2. A combined power and communications cable according to claim 1, wherein: the high-power insulated wires in the first wire harness group comprise a first power wire, a second power wire, a third power wire and a grounding wire; and the conductor part diameter of any high-power insulated wire is larger than the conductor diameters of the data signal wire and the low-power insulated wire.

3. A combined power and communications cable according to claim 1, wherein: a plurality of data signal wires in the second wire harness group are twisted together around the same center, and a first adhesive tape wrapping layer and a first metal tape layer are sequentially wrapped between the first shielding layers from inside to outside; a filler is arranged between the first adhesive tape coating layer and the gaps of the data signal lines; the first shielding layer is of a metal woven mesh structure, and a second inner sheath wraps the outside of the first shielding layer.

4. A combined power and communications cable according to claim 1, wherein: and a second metal tape layer and a third shielding layer are sequentially coated between the plurality of low-power insulated wires in the fourth wiring harness group and the first inner sheath from inside to outside.

5. A combined power and communications cable according to claim 1, wherein: and a low-resistance friction layer is arranged between the cable sheath and the second shielding layer.

6. A combined power and communications cable according to claim 1, wherein: and the second shielding layer, the first wire harness group, the second wire harness group and the fourth wire harness group are sequentially provided with a wire harness wrapping layer and a third metal belt layer from inside to outside.

Images