Electrical energy transmission system

Abstract

The present invention relates to a system for transmitting electrical energy from at least one energy source to at least one power consumer, particularly for transmitting energy to a portable power consumer without contact. The system comprises at least a first conductor (11) and a second conductor (12). When viewed along the respective axial directions (X1, X2), the conductors (11, 12) each have at least an approximately rectangular cross-section. The long side (L) of the cross-section of the conductors (11, 12) is greater than the wide side (Q) of the cross-section of the conductors (11, 12). The conductors (11, 12) are laid such that the axial directions (X1, X2) of the conductors (11, 12) extend perpendicular to the vertical direction (Z). The first conductor (11) and the second conductor (12) intersect in the intersection region (15), and a holding device (20) is arranged in the intersection region. The first conductor (11) and the second conductor (12) are laid outside the holding device (20) such that the long side (L) of the cross section of the conductors (11, 12) is parallel to the vertical direction (Z). The first conductor (11) and the second conductor (12) are laid in the central region of the holding device (20) such that the long side (L) of the cross section of the conductors (11, 12) is perpendicular to the vertical direction (Z).

Description

Technical Field

[0001] The present invention relates to a system for transmitting electrical energy from at least one energy source / power supply to at least one power consumer, particularly a system for transmitting energy to a portable power consumer without contact. The system includes at least one first conductor and a second conductor, wherein, when viewed along their respective axial directions, the conductors each have at least an approximately rectangular cross-section, wherein the long side of the cross-section of the conductor is greater than the wide side of the cross-section of the conductor, and wherein the conductors are laid such that the axial direction of the conductor extends perpendicular to the vertical direction. Background Technology

[0002] A system for contactless energy transfer is known from DE 100 53 373B4. The system includes a feed device that feeds a medium-frequency alternating current into an elongated primary conductor. A movable power consumer is movable along the primary conductor and correspondingly has a coil inductively coupled to the primary conductor. Energy can be transferred from the primary conductor to the power consumer via this inductive coupling.

[0003] A system for contactless energy transfer is also known from DE 10 2006 013 004 A1, which includes a feeding device for feeding a medium-frequency alternating current into an elongated primary conductor.

[0004] A system for contactless energy transfer is known from DE 10 2004 055 154 B4. The system includes a current source connected to an elongated primary conductor. A movable power consumer, movable along the primary conductor, has a transmitter head. The transmitter head has a winding inductively coupled to the primary conductor. Energy can be transferred from the primary conductor to the transmitter head of the power consumer through this inductive coupling.

[0005] A device for contactless energy transfer is also known from DE 10 2006 025 458 A1, which has a primary conductor system and a device with a transmitter head that can be moved along the primary conductor system.

[0006] A system for inductively transmitting energy in a contactless manner is also known from US 2015 / 0364248 A1.

[0007] A coupling device for inductively transmitting energy to a load is known from EP 3 425 649 A1.

[0008] A device for securing conductors in a line channel with a safety device is known from DE 110 07 47A.

[0009] This type of system for transmitting electrical energy is particularly useful in industrial enterprises. Here, the conductor that generates the magnetic field is preferably laid on the ground. For this purpose, recesses are cut or milled into the ground along the laying route, and rectangular conductors are embedded into these recesses. Here, the conductors are laid directly below the ground surface in a plane. The problem here is how to achieve the intersections of multiple conductors. Summary of the Invention

[0010] The purpose of this invention is to improve an electrical power transmission system.

[0011] According to the invention, this objective is achieved by an electrical power transmission system having the features described in claim 1. Advantageous designs and improvements are the subject of the dependent claims.

[0012] The system according to the invention for transferring electrical energy from at least one energy source to at least one power consumer, particularly for contactless transfer of energy to a mobile power consumer, comprises at least a first conductor and a second conductor, wherein, viewed along their respective axial directions, the conductors each have a cross-section that is at least approximately rectangular, wherein the long side of the cross-section of the conductor is greater than the wide side of the cross-section of the conductor, and wherein the conductors are laid such that their axial directions extend perpendicular to the vertical direction. The first and second conductors intersect in an intersection region, where a retaining device is arranged. The first and second conductors are laid outside the retaining device such that the long side of the cross-section of the conductor is oriented parallel to the vertical direction. The first and second conductors are laid in the central region of the retaining device such that the long side of the cross-section of the conductor is oriented perpendicular to the vertical direction.

[0013] Here, the first conductor extends along a first axial direction, while the second conductor extends along a second axial direction. These conductors are rotated 90° in the central region of the retaining device relative to their respective orientations in the edge regions and outside the retaining device. Therefore, in the central region, the vertical extension dimension of the conductor is smaller than that in the edge regions and outside the retaining device. Thus, it is possible to achieve conductor crossing, wherein no additional vertical space is required in the crossing region. Additionally, the retaining device protects the crossing region from mechanical loads, for example, when a vehicle passes overhead.

[0014] According to a preferred embodiment of the invention, the first and second conductors are laid in the region between the edge region and the center region of the holding device, such that the long side of the cross-section of the conductors is inclined relative to the vertical direction and oriented inclined relative to the corresponding transverse direction. Here, the first transverse direction is perpendicular to the first axial direction and extends perpendicular to the vertical direction. Here, the second transverse direction is perpendicular to the second axial direction and extends perpendicular to the vertical direction.

[0015] According to an advantageous improvement of the invention, the retaining device has an upper part and a lower part, wherein the upper and lower parts are arranged offset from each other in a vertical direction, and wherein the conductor is held in a locking manner between the upper and lower parts. The upper and lower parts are designed such that the rotation of the conductor is achieved by compressing the upper and lower parts in a vertical direction.

[0016] According to an advantageous design of the invention, the upper and lower components are constructed identically. Therefore, the manufacture and storage of the retaining device are advantageously simplified.

[0017] According to a preferred embodiment of the invention, the upper and lower components are made of electrically insulating materials, particularly plastics. Therefore, the retaining device does not contain any metal elements that could affect the magnetic field generated by the wire conductor. The upper and lower components can be manufactured, for example, by injection molding, milling, or additive manufacturing.

[0018] According to an advantageous design of the invention, the upper and lower components are detachably connected to each other by at least one threaded connection made of an electrically insulating material, particularly plastic. Therefore, the retaining device does not contain any metal elements that could affect the magnetic field generated by the wire conductor. Other connection techniques, such as locking connections, are also conceivable, especially when the upper and lower components are manufactured as injection-molded parts.

[0019] According to a preferred embodiment of the invention, when viewed vertically, the retaining device has a cross-section that is at least approximately circular. Here, the retaining device can be easily installed in the ground or in the paving using simple tools. For example, a cylindrical hole is introduced into the ground or paving using a grooving machine, and the retaining device is embedded therein.

[0020] According to an advantageous design of the invention, the retaining device has at least a first channel for receiving a first wire conductor and a second channel for receiving a second wire conductor, wherein the channels extend from the edge region of the retaining device through the central region of the retaining device to the respective at least approximately opposite edge regions of the retaining device.

[0021] According to a preferred design of the invention, the first channel extends at least approximately perpendicular to the second channel. This simplifies the geometric design of the retaining device. Of course, other angles besides a right angle between the first and second channels are also conceivable.

[0022] According to an advantageous design of the invention, the channels each have at least an approximately rectangular cross-section, wherein the longer side of the channel's cross-section is greater than the wider side of the channel's cross-section. Here, the channels are configured such that in the edge region of the retaining device, the longer side of the channel's cross-section is oriented parallel to the vertical direction, and in the central region of the retaining device, the longer side of the channel's cross-section is oriented perpendicular to the vertical direction. Here, the cross-section of the channel corresponds to the cross-section of the wire conductor.

[0023] According to a preferred embodiment of the invention, the long side of the channel's cross-section extends obliquely relative to the vertical direction and also obliquely relative to the corresponding lateral direction in the region between the edge region and the center region of the holding device. Therefore, the channel rotates between the edge region and the center region.

[0024] According to an advantageous design of the invention, in the central region of the retaining device, the first channel and the second channel extend vertically offset from each other. Therefore, the first conductor also extends vertically offset relative to the second conductor. Thus, the total vertical extension of the conductors in the central region is equivalent to twice the width of the conductor, and is less than the vertical extension of a single conductor in the edge regions of the retaining device and outside the retaining device.

[0025] According to an advantageous improvement of the invention, the retaining device has two first channels for accommodating two parallel extending first conductors and / or two second channels for accommodating two parallel extending second conductors. Therefore, two first conductors (e.g., as supply and return conductors) and two second conductors (e.g., as supply and return conductors) can be laid in the system.

[0026] This invention is not limited to the combination of features in the claims. For those skilled in the art, in particular, other meaningful combinations of the claims and / or individual claim features and / or specification features and / or drawing features are possible, both for the purposes presented and / or by comparison with the prior art. Attached Figure Description

[0027] The invention will now be explained in detail with reference to the accompanying drawings. The invention is not limited to the embodiments shown in the drawings. The drawings are merely schematic representations of the subject matter of the invention. Hereinafter:

[0028] Figure 1 A top view of a portion of an electrical power transmission system is shown.

[0029] Figure 2 It shows Figure 1 An exploded view of a part of the power transmission system.

[0030] Figure 3 It shows Figure 1 Enlarged view of the holding device,

[0031] Figure 4 It shows Figure 3 The front view of the holding device along the viewing direction F.

[0032] Figure 5 It shows Figure 3 A cross-sectional view of the retaining device along the first cutting line AA, and

[0033] Figure 6 It shows Figure 3 A cross-sectional view of the retaining device along the second cutting line BB. Detailed Implementation

[0034] Figure 1 A top view of a portion of an electrical power transmission system is shown. The portion of the electrical power transmission system shown here includes a laying slab 50, which is made of an electrically insulating material, particularly plastic. The laying slab 50 has a plurality of locking lugs 51 for securing the laying slab 50 to other laying slabs 50 of the electrical power transmission system, not shown here. The laying slab 50 is laid on a flat ground.

[0035] The power transmission system currently includes two first conductors 11 and one second conductor 12. The first conductors 11 extend parallel to each other along a first axial direction X1 and perpendicular to the second conductor 12, which extends along a second axial direction X2. A holding device 20 is arranged in the intersection region 15 to hold the conductors 11 and 12. Viewed along the vertical direction Z, the holding device 20 has a circular cross-section.

[0036] Therefore, the first axial direction X1 extends perpendicularly to the second axial direction X2. The vertical direction Z extends here perpendicularly to the axial directions X1 and X2 of the two conductors 11 and 12.

[0037] The power transmission system includes one or more energy sources (not shown) electrically connected to conductors 11 and 12. Each energy source has a current source that provides a medium-frequency alternating current with a fundamental frequency of, for example, 25 kHz or 50 kHz. The current intensity of the medium-frequency alternating current is, for example, 60 A or 90 A. The electrical energy supplied by the energy sources is transmitted to one or more power consumers (not shown). In particular, this system is used for contactless transmission of energy to mobile power consumers.

[0038] It is conceivable that each of the conductors 11 and 12 is connected to a separate energy source, and that the individual conductors 11 and 12 are electrically insulated from each other. It is also conceivable that the first conductor 11 is connected to the same energy source and, for example, represents a supply conductor and a return conductor. In this case, the first conductors 11 are electrically connected to each other. It is also possible that the first conductor 11 is a single conductor laid out in a loop. It is also conceivable that the second conductor 12 is electrically connected to the first conductor 11, or that the conductors 11 and 12 are single conductors laid out in one or more loops.

[0039] Figure 2 It shows Figure 1 An exploded view of a portion of a power transmission system. The laying slab 50 has multiple recesses 52 into which conductors 11, 12 are inserted. It is also conceivable that the recesses 52 are milled into the ground, and the conductors 11, 12 are thus laid in the ground, particularly directly beneath the ground surface. In this case, the power transmission system does not require the laying slab 50.

[0040] A hole with a circular cross-section is introduced into the laying slab 50, and the retaining device 20 is embedded in the hole. Alternatively, the hole may be introduced into the ground. The recess 52 connects directly to the hole. The first conductor 11 and the second conductor 12 cross in the central region of the retaining device 20.

[0041] Conductors 11 and 12 each comprise multiple (currently three) core wires made of conductive material, particularly copper. The core wires are surrounded by insulating material. Conductors 11 and 12, viewed along their respective axial directions X1 and X2, have approximately rectangular cross-sections. Here, the longer side L of the cross-section is greater than the shorter side Q. Currently, the longer side L is approximately three times the length of the shorter side Q.

[0042] The first conductor 11 is laid outside the holding device 20 such that the long side L of the cross-section of the first conductor 11 is parallel to the vertical direction Z and perpendicular to the first transverse direction Y1. The first transverse direction Y1 extends perpendicular to the first axial direction X1 of the first conductor 11 and perpendicular to the vertical direction Z.

[0043] The first conductor 11 is laid in the region between the edge region and the center region of the holding device 20, such that the long side L of the cross-section of the first conductor 11 is inclined relative to the vertical direction Z and also inclined relative to the first transverse direction Y1.

[0044] The first conductor 11 is laid in the central region of the holding device 20 such that the long side L of the cross-section of the first conductor 11 is perpendicular to the vertical direction Z and oriented parallel to the first transverse direction Y1.

[0045] The second conductor 12 is laid outside the holding device 20 such that the long side L of the cross-section of the second conductor 12 is parallel to the vertical direction Z and perpendicular to the second transverse direction Y2. The second transverse direction Y2 extends perpendicular to the second axial direction X2 of the second conductor 12 and perpendicular to the vertical direction Z.

[0046] The second conductor 12 is laid in the region between the edge region and the center region of the holding device 20, such that the long side of the cross-section of the second conductor 12 is inclined relative to the vertical direction Z and also inclined relative to the second transverse direction Y2.

[0047] The second conductor 12 is laid in the central region of the holding device 20 such that the long side L of the cross-section of the second conductor 12 is perpendicular to the vertical direction Z and oriented parallel to the second transverse direction Y2.

[0048] The retaining device 20 has an upper part 21 and a lower part 22. The upper part 21 and the lower part 22 are arranged offset from each other along the numerical direction Z. The wire conductors 11 and 12 are held between the upper part 21 and the lower part 21 in a form-locking manner. The upper part 21 and the lower part 22 are currently constructed identically.

[0049] The upper component 21 and the lower component 22 are made of electrically insulating material, especially plastic. The upper component 21 and the lower component 22 are detachably connected to each other by means of a plurality of bolts 25 and nuts 26, the bolts and nuts being made of electrically insulating material, especially plastic. The upper component 21 and the lower component 22 each have a recess for receiving the bolt head of the bolt 25 and the nut 26.

[0050] Figure 3 It shows Figure 1 An enlarged view of the holding device 20. The holding device 20 has two first channels 31 for accommodating one first conductor 11 each. The holding device 20 also has two second channels 32 for accommodating one second conductor 12 each. The channels 31, 32 are formed between the upper part 21 and the lower part 22 of the holding device 20. In the illustration shown here, the channels 31, 32 are covered by the upper part 21 of the holding device 20.

[0051] A first channel 31 extends along a first axial direction X1 from the edge region of the retaining device 20, through the central region of the retaining device 20, to an approximately opposite edge region of the retaining device 20. A second channel 32 extends along a second axial direction X2 from the edge region of the retaining device 20, through the central region of the retaining device 20, to an approximately opposite edge region of the retaining device 20. Here, the first channel 31 extends perpendicular to the second channel 32.

[0052] The observation direction F extends along the first axial direction X1. The first cutting line AA is perpendicular to the first axial direction X1 and extends outside the second channel 32. The second cutting line BB extends perpendicular to the first axial direction X1 and extends through one of the second channels 32.

[0053] Figure 4 It shows Figure 3 The holding device 20 is viewed from the front along the viewing direction F. Each of the first channels 31 has a cross-section that is at least approximately rectangular. Here, the long side L of the cross-section of the first channel 31 is greater than the wide side Q of the cross-section of the first channel 31. Each first conductor 11 is accommodated in each of the first channels 31. The long side L of the cross-section of the first channel 31 is approximately equal to the long side L of the cross-section of the first conductor 11. The wide side Q of the cross-section of the first channel 31 is approximately equal to the wide side Q of the cross-section of the first conductor 11. In the visible edge region of the holding device 20, the long side L of the cross-section of the first channel 31 is oriented parallel to the vertical direction Z and perpendicular to the first transverse direction Y1.

[0054] Figure 5 It shows Figure 3 The holding device 20 is shown in cross-section along the first cutting line AA. In the visible region between the edge region and the center region of the holding device 20, the long side L of the cross-section of the first channel 31 is inclined relative to the vertical direction Z and also inclined relative to the first transverse direction Y1. The first channel 31 rotates approximately 45° about the first axial direction X1 relative to its orientation in the edge region. Similarly, the first conductor 11 also rotates approximately 45° about the first axial direction X1 relative to its orientation in the edge region.

[0055] Figure 6 It shows Figure 3 The holding device 20 is shown in cross-sectional view along the second cutting line BB. In the central region of the holding device 20, visible here, the long side L of the cross-section of the first channel 31 is oriented perpendicular to the vertical direction Z and parallel to the first transverse direction Y1. The first channel 31 is rotated approximately 90° about the first axial direction X1 relative to its orientation in the edge region. Similarly, the first conductor 11 is also rotated approximately 90° about the first axial direction X1 relative to its orientation in the edge region.

[0056] The second channels 32 each have at least an approximately rectangular cross-section. Here, the longer side L of the cross-section of the second channel 32 is greater than the shorter side Q of the cross-section. The longer side L of the cross-section of the second channel 32 is approximately equivalent to the longer side L of the cross-section of the second conductor 12. The shorter side Q of the cross-section of the second channel 32 is approximately equivalent to the shorter side Q of the cross-section of the second conductor 12. In the edge region of the holding device 20, the longer side L of the cross-section of the second channel 32 is parallel to the vertical direction Z and perpendicular to the second transverse direction Y2.

[0057] In the region between the edge region and the center region of the retaining device 20, the long side L of the cross-section of the second channel 31 is inclined relative to the vertical direction Z and also inclined relative to the second transverse direction Y2. The second channel 32 rotates about 45° about the second axial direction X2 relative to its orientation in the edge region. Similarly, the second conductor 12 also rotates about 45° about the second axial direction X2 relative to its orientation in the edge region.

[0058] In the central region of the retaining device 20, the long side L of the cross-section of the second channel 32 is oriented perpendicular to the vertical direction Z and parallel to the second transverse direction Y2. The second channel 32 is rotated approximately 90° about the second axial direction X2 relative to its orientation in the edge region. Similarly, the second conductor 12 is also rotated approximately 90° about the second axial direction X2 relative to its orientation in the edge region.

[0059] In the central region of the holding device 20, the first channel 31 and the second channel 32 extend offset from each other along the vertical direction Z. The first conductor 11 extends offset from the second conductor 12 along the vertical direction Z. Here, the first conductor 11 is closely attached to the second conductor 12. Therefore, the total extension dimension of the conductors 11 and 12 along the vertical direction Z in the central region is equivalent to twice the width Q of the conductors 11 and 12. The extension dimension of a single conductor 11 and 12 along the vertical direction Z in the edge region of the holding device 20 is equivalent to the length L of the conductors 11 and 12. As mentioned above, the length L is currently approximately three times larger than the width Q. Therefore, the total extension dimension of the conductors 11 and 12 along the vertical direction Z in the central region is smaller than the extension dimension of the conductors 11 and 12 along the vertical direction Z in the edge region.

[0060] List of reference numerals in the attached diagram:

[0061] 11 First conductor

[0062] 12 Second conductor

[0063] 15 Intersection Area

[0064] 20 Holding device

[0065] 21 Upper Components

[0066] 22 Lower Components

[0067] 25 bolts

[0068] 26 nuts

[0069] 31 First Channel

[0070] 31 Second Channel

[0071] 50 laying boards

[0072] 51 Locking Protruding Nose

[0073] 52 recess

[0074] A First Cutting Line

[0075] B Second cutting line

[0076] F Observation direction

[0077] L (long side)

[0078] Q width

[0079] X1 First axial direction

[0080] X2 Second Axial Direction

[0081] Y1 First lateral direction

[0082] Y2 Second lateral direction

[0083] Z (vertical direction)

Claims

1. A system for transferring electrical energy from at least one energy source to at least one power consumer, said system comprising at least... First conductor (11) and second conductor (12). in, Viewed along the corresponding axial directions (X1, X2), the first conductor (11) and the second conductor (12) each have a cross-section that is at least approximately rectangular. Among them, the long side (L) of the cross-section of the first conductor (11) and the second conductor (12) is greater than the wide side (Q) of the cross-section of the corresponding conductor. The first conductor (11) and the second conductor (12) are laid such that the axial directions (X1, X2) of the first conductor (11) and the second conductor (12) extend perpendicular to the vertical direction (Z). Its features are, The first conductor (11) and the second conductor (12) cross in the crossing region (15), where a retaining device (20) is arranged. The first conductor (11) and the second conductor (12) are laid outside the holding device (20) such that the long side (L) of the cross-section of the first conductor (11) and the second conductor (12) is oriented parallel to the vertical direction (Z). The first conductor (11) and the second conductor (12) are laid in the central region of the holding device (20) such that the long side (L) of the cross-section of the first conductor (11) and the second conductor (12) is oriented perpendicular to the vertical direction (Z).

2. The system according to claim 1, characterized in that, The system is used to transmit electrical energy to mobile power consumers without contact.

3. The system according to claim 1 or 2, characterized in that, The first conductor (11) and the second conductor (12) are laid in the region between the edge region of the holding device (20) and the center region of the holding device (20) such that the long side (L) of the cross-section of the first conductor (11) and the second conductor (12) is inclined relative to the vertical direction (Z) and also inclined relative to the corresponding transverse direction (Y1, Y2).

4. The system according to claim 1 or 2, characterized in that, The holding device (20) has an upper part (21) and a lower part (22), wherein the upper part (21) and the lower part (22) are arranged offset from each other in a vertical direction (Z), and the first wire conductor (11) and the second wire conductor (12) are held in a form-locking manner between the upper part (21) and the lower part (22).

5. The system according to claim 4, characterized in that, The upper part (21) and the lower part (22) have the same structure.

6. The system according to claim 4, characterized in that, The upper part (21) and the lower part (22) are made of electrically insulating material.

7. The system according to claim 6, characterized in that, The electrical insulation material is plastic.

8. The system according to claim 4, characterized in that, The upper part (21) and the lower part (22) are detachably connected to each other by at least one threaded part (25) made of an electrically insulating material.

9. The system according to claim 8, characterized in that, The electrical insulation material is plastic.

10. The system according to claim 1 or 2, characterized in that, Viewed along the vertical direction (Z), the holding device (20) has a cross-section that is at least approximately circular.

11. The system according to claim 1 or 2, characterized in that, The holding device (20) has at least a first channel (31) for receiving a first wire conductor (11) and a second channel (32) for receiving a second wire conductor (12), wherein the first channel (31) and the second channel (32) extend from the edge region of the holding device (20) through the central region of the holding device (20) to the corresponding at least approximately opposite edge regions of the holding device (20).

12. The system according to claim 11, characterized in that, The first channel (31) extends at least approximately perpendicular to the second channel (32).

13. The system according to claim 11, characterized in that, The first channel (31) and the second channel (32) each have at least an approximately rectangular cross-section. The long side (L) of the cross-section of the first channel (31) and the second channel (32) is greater than the wide side (Q) of the cross-section of the corresponding channel. The first channel (31) and the second channel (32) are configured such that in the edge region of the holding device (20), the long side (L) of the cross-section of the first channel (31) and the second channel (32) is oriented parallel to the vertical direction (Z), and in the central region of the holding device (20), the long side (L) of the cross-section of the first channel (31) and the second channel (32) is oriented perpendicular to the vertical direction (Z).

14. The system according to claim 13, characterized in that, The long side (L) of the cross-section of the first channel (31) and the second channel (32) extends obliquely relative to the vertical direction (Z) and also obliquely relative to the corresponding horizontal direction (Y1, Y2) in the region between the edge region of the retaining device (20) and the center region of the retaining device (20).

15. The system according to claim 11, characterized in that, In the central region of the retaining device (20), the first channel (31) and the second channel (32) extend offset from each other in the vertical direction (Z).

16. The system according to claim 11, characterized in that, The retaining device (20) has two first channels (31) for accommodating two parallel extending first wire conductors (11) and / or two second channels (32) for accommodating two parallel extending second wire conductors (12).

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