COMBINATION CABLE FOR ELECTRICAL ENERGY AND DATA TRANSMISSION

Abstract

A combination cable for electrical energy and data transmission has one or more high-current lines and a first data line pair, which has two intertwined data lines that are at least partly surrounded by an at least partly electrically conductive sheath. The combination cable furthermore has a second data line pair that has two data lines that are spaced from one another. The data lines that are spaced from one another of the second data line pair are each arranged on an outer surface of the at least partly electrically conductive sheath of the first data line pair.

Claims

1. Combination cable for electrical energy and data transmission, having one or more high-current lines; a first data line pair, which has two data lines stranded with one another, which are at least partly enclosed by an electrically conductive sheath; characterised in that the electrically conductive sheath is adapted to take up a portion of energy emitted by the lines of the combination cable by means of electromagnetic waves and to convert these at least partly into heat; two further data lines spaced at a distance from one another; wherein the two further data lines that are spaced at a distance from one another are each arranged on an outer jacket surface of the at least partly electrically conductive sheath of the first data line pair, and the two further data lines that are spaced at a distance from one another are spaced from one another by a distance of 1% to 31% of the jacket circumference of the sheath.

2. Combination cable according to claim 1, wherein the one or more high-current lines is/are electrically insulated.

3. Combination cable according to claim 1, wherein the one or more high-current lines is/are enclosed at least partly by an electromagnetic shield, in particular by a foil shield and/or braided shield.

4. Combination cable according to claim 1, wherein the first data line pair has electrical insulation for each of the stranded data lines.

5. Combination cable according to claim 1, wherein the two further data lines are each electrically insulated.

6. Combination cable according to claim 1, wherein the first data line pair is adapted to transmit data signals with a frequency of over one kilohertz; and/or the two further data lines are adapted to transmit data signals with a frequency of below one kilohertz.

7. Combination cable according to claim 1, wherein the electrically conductive sheath has an elliptical, in particular a circular, cross-sectional geometry.

8. Combination cable according to claim 1, wherein the electrically conductive sheath completely encloses the first data line pair in a radial direction.

9. Combination cable according to claim 1, wherein the electrically conductive sheath enclosing the first data line pair has a dielectric coating or lacquering, which forms the outer circumferential surface of the sheath.

10. Combination cable according to claim 1, having at least two high-current lines, wherein the at least two high-current lines together border a high-current line intermediate space, and wherein the data lines of the first data line pair and the two further data lines spaced at a distance from one another are each spaced at least by a predetermined distance from the high-current line intermediate space, and the data lines of the first and the second data line pair are each spaced from a straight line, which is tangent to the two high-current lines, in a direction leading away from the high-current lines.

11. Combination cable according to claim 10, wherein the at least two high-current lines are arranged unstranded adjacent to one another.

12. Combination cable according to claim 1, wherein, if X is the shortest possible distance of a first straight line, which is tangent to both of the data lines spaced at a distance from one another, from a second straight line, which runs parallel to the first straight line through a cross-sectional centre point of the first data line pair, and if Y is a diameter of a data line of the first data line pair, in particular the diameter of a data line of the first data line pair including insulation of this data line, then X is 0.9 times the value of Y.

Description

[0039] FIG. 1 shows schematically an example of known combination cables for electrical energy and data transmission.

[0040] FIG. 2 shows schematically another example of known combination cables for electrical energy and data transmission.

[0041] FIGS. 3-5 each show schematically and by way of example a combination cable for electrical energy and data transmission with a partly electrically conductive sheath, which encloses a data line pair.

[0042] FIG. 1 shows schematically an example of known combination cables 100 for electrical energy and data transmission in a cross-sectional view. The combination cable 100 has a circular cross-sectional geometry and has a first high-current line arrangement A and a second high-current line arrangement B. The first high-current line arrangement A has a first high-current line A30, a first high-current line insulation A20 and a first high-current line shield A10. The second high-current line arrangement B has a second high-current line B30, a second high-current line insulation B20 and a second high-current line shield B10.

[0043] Furthermore, the example of a combination cable 100 shown in FIG. 1 has a first data line arrangement C and a second data line arrangement D. The first data line arrangement C here has a first data line shield C10, a first filler material C15 and a first data line pair, which has two data lines C32, C34 stranded with one another, which are each enclosed by data line insulation C22, C24. The second data line arrangement D here has a second data line shield D10, a second filler material D15 and a second data line pair, which has two data lines D32, D34 stranded with one another, which are each enclosed by data line insulation D22, D24.

[0044] Furthermore, the line arrangements A, B, C and D shown in FIG. 1 are stranded with one another to counteract the effects of capacitive and inductive couplings between the line arrangements.

[0045] A disadvantage of the device shown in FIG. 1 is that on account of the stranding of the line arrangements and of the shields A10, B10, C10 and D10, assembly of the combination cable 100 is rendered difficult and in particular time-consuming.

[0046] FIG. 2 shows schematically another example of known combination cables 200 for electrical energy and data transmission in a cross-sectional view. The high-current line arrangements A and B shown correspond here to the high-current line arrangements shown in FIG. 1 and described above. Deviating from the example shown in FIG. 1, however, the combination cable 200 has a data line arrangement E with the star-quad-twisted or quad-twisted data lines E32, E34, E36 and E38. The data line arrangement E in this case has a data line shield E10, filler material E15, the four star-quad-twisted data lines E32, E34, E36 and E38, which are each enclosed by insulation E22, E24, E26, E28, and the central element E40, around which the star-quad-twisted or quad-twisted data lines E32, E34, E36 and E38 are arranged.

[0047] The line arrangements A, B and E shown in FIG. 2 are further stranded with one another to counteract the effects of capacitive and inductive couplings between the line arrangements.

[0048] The combination cable shown in FIG. 2 also has the disadvantage that on account of the necessary shields A10, B10 and E10 and on account of the stranding of the line arrangements A, B and E, assembly of the combination cable 100 is rendered difficult and in particular time-consuming.

[0049] FIG. 3 shows a cross-sectional view of a combination cable 300, which is easier to assemble in comparison with those in FIG. 1 and FIG. 2 and in comparison with the combination cables described above.

[0050] The combination cable 300 has a first high-current line arrangement F and a second high-current line arrangement G. The first high-current line arrangement F has a first high-current line F30, which is enclosed by a first high-current line insulation F20. The second high-current line arrangement G has a second high-current line G30, which is enclosed by a second high-current line insulation G20.

[0051] The combination cable 300 further has a first data line arrangement J. The first data line arrangement 3 here has a first pair of data lines 332, 334, which are each enclosed by insulation 322, 324. The data lines 332 and 334 are stranded with one another. The first data line arrangement 3 also has an at least partly electrically conductive sheath 350, which radially encloses the insulated data lines 332, 334 stranded with one another.

[0052] The sheath 350 is adapted to take up at least a portion of the electromagnetic waves emitted by the line arrangements and to convert these at least partly into heat. Impairment of the quality of the data transmission due to the electromagnetic fields caused in particular by the high-current lines F30, G30 on account of capacitive and/or inductive effects can be reduced hereby.

[0053] The data line arrangement 3 shown as an example in FIG. 3 with the sheath 350 has a dielectric sheath surface 360, which is formed together with the sheath 350. In other words, it can be described that the dielectric sheath surface 360 forms the outer jacket surface or circumferential surface of the at least partly electrically conductive sheath 350.

[0054] FIG. 3 further shows that the combination cable 300 has a second data line arrangement H1, H2, which has a pair of data lines H32 and H34 spaced at a distance from one another. In the example shown, the data lines H32 and H34 spaced at a distance from one another are each enclosed by insulation H22, H24, but this is not necessary in all embodiments.

[0055] The insulated data lines H32 and H34 of the second data line arrangement H1, H2, which are spaced at a distance from one another, are each arranged on the outer jacket surface 360 of the at least partly electrically conductive sheath 350 of the first data line arrangement J.

[0056] In the example shown, the data lines 332, 334 of the first data line arrangement 3 are adapted to transmit data signals with a higher frequency than the data lines H32, H34 of the second data line arrangement H1, H2. For example, the data lines 332, 334 can be adapted for the transmission of data signals with a frequency of one megahertz or higher, while the data lines H32, H34 are adapted for the transmission of data signals with a frequency of less than one megahertz.

[0057] Since data signals with a comparatively higher frequency react more sensitively to electromagnetic interference factors and can be impaired more easily by such interference factors than data signals with a comparatively low frequency, to ensure still tolerable electromagnetic impairment of the respective data line pairs it is sufficient for the data lines H32, H34 of the second data line arrangement H1, H2 to be arranged on the outer jacket surface 360 of the sheath of the first data line arrangement 3, while the data lines 332, 334 of the first data line arrangement 3 are enclosed by the at least partly electrically conductive sheath 350.

[0058] FIGS. 4 and 5 serve to further clarify advantageous aspects of the combination cable 300 shown in FIG. 3. The device constituents of the combination cable 300 shown in FIGS. 4 and 5 are not provided with reference characters for reasons of clarity, the construction of the combination cable 300 shown in FIGS. 4 and 5 being identical in each case to that of the combination cable 300 described previously and shown in FIG. 3.

[0059] FIG. 4 illustrates that all data lines H32, H34, 332, 334 of the combination line 300 are spaced by at least the distance Z2 from one of the high-current lines F30, G30. Furthermore, all data lines H32, H34, 332, 334 of the combination line 300 are also spaced from an intermediate space bordered by the high-current lines F30, G30 and/or from an area between two straight lines parallel to one another, which are each tangent to the two high-current lines F30, G30. In other words, it can be described that the data lines H32, H34, 332, 334 are arranged, in a cross-sectional view of the combination line 300, each in a different vertical plane/cross-sectional plane than the high-current lines F30, G30.

[0060] One advantage here is that the electromagnetic fields produced by the high-current lines F30, G30 in an area between two straight lines parallel to one another that are each tangent to the high-current lines F30, G30 have the greatest electromagnetic field strengths, so that spacing the data lines at a distance from this area counteracts an impairment of the quality of data transmission.

[0061] FIG. 5 illustrates that the data lines 332, 334 stranded with one another are also spaced at a distance from the data lines H32, H34 arranged on the outer surface 360 of the at least partly electrically conductive sheath 350 in such a way that the data line pairs of the data line arrangements H and 3 are each arranged, in a cross-sectional view of the combination line 300, in a different vertical plane/cross-sectional plane. In other words, it can be described that the stranded data lines 332, 334 are not located or are at least scarcely located in an intermediate space bordered by the data lines H32, H34 arranged on the outer surface 360 of the sheath 350.

[0062] This is ensured in the example shown in that if X is the shortest possible distance of a first straight line, which is tangent to the data lines H32, H34 of the second data line arrangement H1, H2, from a second straight line, which runs parallel to the first straight line through a cross-sectional centre point or through a stranding axis of the first data line arrangement 3 with the stranded data lines 332, 334, and if Y is a diameter of one of the stranded data lines 332, 334 including its insulation 322, 324, then X is 0.9 times the value of Y.

[0063] An advantage here is that the electromagnetic fields produced by the data lines H32, H34 of the second data line arrangement H1, H2, which fields occur principally in a data line intermediate space bordered between the data lines H32 and H34, only impair a data transmission via the data lines 332, 334 of the first line arrangement 3 to a reduced extent.

[0064] It is understood that the exemplary embodiments explained above are not conclusive and do not restrict the subject matter disclosed here. In particular, it is evident to the expert that he can combine the features described in any way with one another and/or can omit various features without deviating in this case from the subject matter disclosed here.