EP3375002A1 - Elektrische verbindungsleitung mit vermindertem induktivitätsbelag - Google Patents
Elektrische verbindungsleitung mit vermindertem induktivitätsbelagInfo
- Publication number
- EP3375002A1 EP3375002A1 EP16775261.7A EP16775261A EP3375002A1 EP 3375002 A1 EP3375002 A1 EP 3375002A1 EP 16775261 A EP16775261 A EP 16775261A EP 3375002 A1 EP3375002 A1 EP 3375002A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connection line
- electrical connection
- region
- actuator
- core region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/30—Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/182—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments
- H01B7/1825—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of a high tensile strength core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
Definitions
- the present invention relates to an electrical connection line, which is particularly suitable for the connection of actuators in a vehicle with an electronic control unit.
- the control unit acts on the actuator with a current, whereupon the actuator is caused to a mechanical movement.
- the actuator is usually connected via a two-core cable to the controller. These two-core cables are usually part of a larger wiring harness.
- actuators for example in piezo actuators of injection systems, it is necessary to control the voltage drop across the actuator UA to a certain value. For this it is necessary to know this voltage UA. For accurate measurement UA, it would actually be necessary to tap UA at the actuator connections and feed it back to the control unit via two separate lines, also called sense lines. This is usually omitted for cost reasons.
- Control unit and actuator no current leads. However, while the actuator is being driven, the connection line is currently carrying a current. Because the
- Connecting line has an ohmic resistance R and an inductance L are UM and UA via
- connection cables in vehicles are less than two meters long and have a conductor cross-section of 1 mm 2 , so that the ohmic resistance amounts to significantly less than 100 ⁇ . Therefore, the ohmic resistance of the connection line causes only a slight deviation between UM and UA.
- actuators often require rapid actuation, the temporal current gradient dl / dt on the connecting line is very high. In conjunction with the inductance L of the connecting line, this leads to a significant deviation between the measured value UM and the true value UA of the voltage drop across the actuator.
- the inductance of the connecting line is the product of the length I of this line with its inductance coating L 'per unit length I.
- the line length I is usually given by the vehicle body and can not be optimized. The closer the two conductors of the two-wire connection line lie to each other, the thinner the insulation between the two conductors is, the smaller the inductance coating L '. The thickness of this insulation can be reduced only within narrow limits, which are given by standards and safety regulations. Thus, usually the only viable measure for reducing the inductance pad L 'is to increase the diameter of the conductors. Disadvantageously, the copper usually used for the conductors is very expensive, so that the reduction of the inductance coating L 'significantly increases the costs for the connecting line.
- an electrical connection line which is particularly suitable for connecting actuators installed in vehicles with an electronic control unit.
- This connecting line comprises at least two electrical conductors separated from each other by an insulating material.
- At least one conductor has a core region which is surrounded by a cladding region.
- the electrical conductivity K2 of the cladding region is higher than the electrical conductivity ⁇ of the core region.
- ⁇ 0 is the magnetic permeability of the vacuum
- d a is the
- Outer diameter of the cladding region of the two conductors, a is the distance between both conductors, d, is the outer diameter of the core region of the two conductors.
- core area can now be made of a material that is much cheaper than, for example, copper.
- the core region is electrically insulating. It may for example be formed from a plastic. Then the effect that the current transport takes place only in the mantle, maximum. Plastics are also cheaper and lighter than copper. However, the core region can also consist, for example, of a metal which conducts much worse and is therefore significantly less noble than the material of the jacket region. Such metals are a bit more expensive and heavier than plastic, but may be more flexible. In addition, then the conversion of machines, with which hitherto connection lines have been made according to the prior art, on the production
- Minimal connection lines For example, a stranding machine only needs to be modified to accommodate threads of two different metals. If, for example, a plastic core having an outer diameter d of 2.16 mm is used and then a cladding region made of copper is applied, which has a cross-sectional area of 1 mm 2 , then this cladding region has an outer diameter of 2.5 mm. With a constant insulation thickness and thus a constant distance a between the conductors of the two-wire line, the inductance coating L 'is reduced by 36% to 0.613 ⁇ / m. Should it be possible to further reduce the thickness of the insulating layer, the further reduction of the inductance coating achieved by this is added in addition.
- both the core region and the cladding region have a circular and / or elliptical cross section and are arranged concentrically to one another.
- the electrical connection line is then particularly easy to produce with a stranding machine.
- the core region is formed as a flexible cylindrical core, on which a plurality of wires is wound, which together form the cladding region.
- the core region is formed as a mesh of interwoven threads or wires. On the one hand, this makes the core area particularly flexible.
- Connecting line is then as flexible as a connecting line according to the prior art, or even more flexible.
- the core area can then be produced particularly well with a stranding machine. In particular, it becomes easier to manufacture the core region and the cladding region simultaneously on the same stranding machine. This applies in particular even if the core region is formed as a mesh of interwoven plastic threads.
- the ratio of the cross-sectional area of the cladding region to the cross-sectional area of the core region is between 2 and 20. It has been recognized that the thickness of the solid conductors available in the prior art has been dictated by the need for a large outer diameter d a and at the same time
- Actuation of actuators formerly commonly used conductor cross-sections of 1 mm 2 results in a material savings between 25% and 80%.
- the invention also relates to an arrangement of a control device and an actuator, which in particular in a
- Vehicle can be installed.
- the actuator by the control unit via a switched between the controller and the actuator electrical
- the control unit has means for measuring the voltage UM, which drops across the series connection of the electrical connection line and the actuator.
- Connecting line is now a connecting line according to the invention described above.
- Figure 1 shows a cross section of an electrical connection line 1 according to the
- FIG. 1 block diagram of the arrangement 10 according to the invention.
- the electrical connection line 1 consists of two identically constructed conductors 3, which are separated by an insulating material 2 from each other. In each case, one half of the total existing insulating material 2 surrounds one of the two conductors 3.
- the electrical connection line 1 is thus composed of two individual cables, each consisting of a conductor 3 with surrounding insulation 2 and parallel to each other, composed.
- Each of the conductors 3 is rotationally symmetrical about its center 33.
- Each conductor 3 comprises a core region 31 made of plastic and a cladding region 32 made of copper. The current transport takes place only in the cladding region 32, but not in the core region 31.
- Figure 2 illustrates how a conductor 3 according to the present invention can be made by stranding.
- the core region 31 made of plastic is formed from interwoven plastic threads 31a to 311. This
- FIG. 2 shows by way of example the stranding of the copper threads 32a to 32g and the stranding of the plastic threads 31a, 31g and 31h.
- Mantle area 32 divided into about 200 individual copper threads.
- the control unit 11 drives a current through the actuator 12. Since the electrical connection line 1 an ohmic
- Resistor R and has an inductance L falls on this ohmic
- Resistor R and at the inductance L each have a voltage.
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015222253.5A DE102015222253A1 (de) | 2015-11-11 | 2015-11-11 | Elektrische Verbindungsleitung mit vermindertem Induktivitätsbelag |
PCT/EP2016/073651 WO2017080717A1 (de) | 2015-11-11 | 2016-10-04 | Elektrische verbindungsleitung mit vermindertem induktivitätsbelag |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3375002A1 true EP3375002A1 (de) | 2018-09-19 |
Family
ID=57047240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16775261.7A Withdrawn EP3375002A1 (de) | 2015-11-11 | 2016-10-04 | Elektrische verbindungsleitung mit vermindertem induktivitätsbelag |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3375002A1 (de) |
DE (1) | DE102015222253A1 (de) |
WO (1) | WO2017080717A1 (de) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2362026A (en) * | 2000-05-04 | 2001-11-07 | Mark William Goldney Baker | Laminar flow cable |
-
2015
- 2015-11-11 DE DE102015222253.5A patent/DE102015222253A1/de not_active Withdrawn
-
2016
- 2016-10-04 EP EP16775261.7A patent/EP3375002A1/de not_active Withdrawn
- 2016-10-04 WO PCT/EP2016/073651 patent/WO2017080717A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
DE102015222253A1 (de) | 2017-05-11 |
WO2017080717A1 (de) | 2017-05-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20180611 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20190612 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ROBERT BOSCH GMBH |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20200103 |