EP1873791A2 - Hybrid cable - Google Patents

Hybrid cable Download PDF

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Publication number
EP1873791A2
EP1873791A2 EP07010325A EP07010325A EP1873791A2 EP 1873791 A2 EP1873791 A2 EP 1873791A2 EP 07010325 A EP07010325 A EP 07010325A EP 07010325 A EP07010325 A EP 07010325A EP 1873791 A2 EP1873791 A2 EP 1873791A2
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EP
European Patent Office
Prior art keywords
conductor
energy
electrical
hybrid cable
shield
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Granted
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EP07010325A
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German (de)
French (fr)
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EP1873791A3 (en
EP1873791B1 (en
Inventor
Alexander Seufert
Peter Krautwald
Tanja Taupitz
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/08—Screens specially adapted for reducing cross-talk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/22—Cables including at least one electrical conductor together with optical fibres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/005—Power cables including optical transmission elements

Definitions

  • Hybrid cable in the context of the invention is understood to mean a cable which serves both for transmitting telecommunications signals and for transmitting energy.
  • Hybrid cables which use different transmission media, such as optical fibers and copper, as well as hybrid cables for transmitting a variety of electrical voltages are known.
  • the Utility Model DE 20 2005 008 731 U1 shows a hybrid cable. It comprises shielded electrical conductors in the cable core for supplying energy and control signal lines arranged on the outer circumference of the shield, and additionally an optical waveguide.
  • the different groups of signal lines and power supply lines are spatially separated. If one of the lines used for energy supply is now to be used for signal transmission or one of the signal lines for energy transmission, this results in interference between the mutually not electrically shielded lines.
  • the usually leading from strong electric fields energy leading lines can lead to the falsification of electrical signals or in the event of a short circuit between the lines even to the destruction of the connected device.
  • the invention has for its object to make a hybrid cable for electric drives such that the best possible shielding between power supply and signal lines can be realized and a protection of the connected peripherals is ensured in the event of a short circuit.
  • the invention solves this problem by means of a hybrid cable for electrical drives with at least one signal conductor and power conductors for supplying the drive with electrical energy, and at least one additional conductor, wherein the signal conductor is an electrical conductor, which is surrounded by an inner electric screen and the energy conductors and the at least one additional conductor are arranged on the circumference of the inner electrical shield, wherein the energy conductor and additional conductor are surrounded by an outer electric screen and wherein between the outer and inner shield at least two shielding conductors are arranged such that a shield and a mechanical spacing between energy conductors and additional conductor can be realized.
  • a hybrid cable for the realization of the DC link wiring of an electric drive and for producing a signal connection between the controller and drive, for example, to realize a leadership communication.
  • the advantage of the arrangement is firstly that instead of two different cables, namely a cable for power supply and a cable for signal supply, now a single cable can be used. This saves wiring and costs.
  • the shielding according to the invention effects a subsequent electrical disconnection possibility between low-voltage lines and power supply lines.
  • the additional lines are due to the existence of the shield between low voltage lines and power lines also mechanically spaced apart, so that both a short circuit between additional conductor and power conductor and mutual interference by electrical and / or magnetic fields can be largely excluded. Possible malfunctions of the connected peripherals are thus minimized and wiring costs reduced.
  • the invention also provides some redundancy with regard to wiring. This redundancy allows the subsequent wiring of a drive and a subsequent shielding of the rewired and an electrical signal lines leading. A wired with the hybrid cable according to the invention drive system can thus be handled very flexible.
  • the shielding conductors improves due to an increased copper filling factor. If the shielding conductors are replaced by a large number of conductors with a small cross-section, the copper fill factor in the line cross-section is also higher and the shielding likewise improved.
  • the signal conductor is used to guide fieldbus signals.
  • the invention avoids a disturbance of the fieldbus signals (command and actual value transmission for the drive) and thus increases operational safety.
  • the energy conductor serves to guide a DC link voltage.
  • a DC link voltage which is usually a DC voltage
  • strong static electric fields occur, which could disturb the other signals.
  • the additional conductor comprises a plurality of wires for guiding low voltages. It can thus be transmitted in addition to the signal lines further control and regulating signals, which are optimally decoupled from the electric fields resulting from the power lines.
  • all conductors are surrounded by an outer sheath.
  • This outer jacket mechanically holds the cable together and at the same time serves as insulation and protection.
  • a connector (plug / socket) is arranged at one end of the cable.
  • the cable can thus be detachably connected to the drive controller and / or the periphery.
  • the electrical connection between the shields and the shield conductors can be realized either by means of the connector by a corresponding wiring in the connector itself, or on a circuit board of the connected peripherals.
  • the invention also includes an electric drive with hybrid cable according to the invention for supplying the drive with electrical energy and for leadership communication, wherein the outer and inner shield and the ground lines are at the same electrical potential, so that an electrical shielding of the energy conductor is effected relative to the additional conductor.
  • the drive can be easily wired so that power supply and management communication is ensured and operational readiness is quickly established.
  • the electrical circuits of the drive are protected against overvoltages. Subsequent wiring and electrical shielding, eg when connecting a feedback unit, is possible at any time.
  • FIG. 1 shows a hybrid cable 8 according to the invention in cross section.
  • an outer sheath 7, an outer shield 6, power conductor 1, shield conductor 2, additional conductor 3, an inner shield 5 and signal lines 4 are shown.
  • the hybrid cable 8 is constructed similar to a coaxial cable.
  • the inner conductor consists in this case of a plurality of signal lines 4, which are surrounded by an inner shield 5. Between this inner shield 5 and the outer shield 6, further conductors 1, 2, 3 are distributed along the outer circumference of the inner shield 4. These conductors 1, 2, 3 serve to transfer energy, i. for operating an electrical device connected by means of the hybrid cable 8 to a power supply, as well as for transmitting low voltage (for example control signals) by means of the additional lines 3.
  • the shielding conductors 2 arranged between the power supply lines 1 and low-voltage wires 3 are used for mechanical spacing and electrical shielding of the power lines 1 3.
  • the mechanical spacing is ensured by the dimensions of the shielding conductors, which substantially completely fill the radial gap between the inner and outer shields.
  • a short circuit between the power line 1 and an additional line 3 is already excluded, solely because of the existence of the shield conductor 2.
  • the ground lines 2 are connected to the same electrical potential as the shields 4, 5, preferably 0 volts or ground, then the electric field lines emanating from the power lines 1 find their end point on the shield conductor 2 and on the surrounding shields 4, 5. The additional lines are therefore no longer exposed to the electric fields emanating from the power lines 1.
  • Mutual electrical interference is largely avoided.
  • the shielding effect is improved. Also, one could replace a single shielding conductor 2 by a plurality of shielding conductors 2 smaller cross-section.
  • the signal conductor 4 serves to guide fieldbus signals and the energy conductor 1 to guide the intermediate circuit DC voltage to supply a drive controller with electrical energy.
  • the additional conductors 3 additionally serve to guide low voltages (eg feedback signals).
  • further control and regulating signals can be transmitted, whereby these can be decoupled optimally by means of the shielding conductor 2 with respect to the electric fields originating from the power lines 1.
  • the outer shell 7 solidifies the Cable mechanically and at the same time serves as insulation and protection.
  • the hybrid cable 8 according to the invention comprises at least at one end of the cable a connector (plug or socket) for connection to the drive controller.
  • the potentials of the shielding conductor 2 and the shields are usually produced on a circuit board of the drive controller. Even within the connector, the potentials could be merged.
  • FIG. 2 shows the effect according to the invention on the cable shown in FIG.
  • the invention causes the formation of potential lines 9, which lead to improved shielding.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulated Conductors (AREA)
  • Waveguides (AREA)
  • Communication Cables (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The cable has a signal conductor (4) and energy conductor (1) for supplying electricity to an electric drive. The signal conductor is an electrical conductor and covered by an inner electrical shield (5). The energy conductor and an auxiliary conductor (3) are arranged at a circumference of the shield. The energy conductor and auxiliary conductor are surrounded by an outer electrical shield (6). Two shield conductors (2) are arranged between the outer and inner shields such that an improved shield and a mechanical distance are realized between the energy and auxiliary conductors.

Description

Die Erfindung befasst sich mit einem Hybridkabel gemäß dem unabhängigen Anspruch. Unter Hybridkabel im Sinne der Erfindung wird ein Kabel verstanden, welches sowohl zur Übertragung nachrichtentechnischer Signale, als auch zur Übertragung von Energie dient.The invention relates to a hybrid cable according to the independent claim. Hybrid cable in the context of the invention is understood to mean a cable which serves both for transmitting telecommunications signals and for transmitting energy.

Hybridkabel, welche unterschiedliche Übertragungsmedien verwenden, beispielsweise Lichtwellenleiter und Kupfer, als auch Hybridkabel zur Übertragung unterschiedlichster elektrischer Spannungen sind bekannt.Hybrid cables, which use different transmission media, such as optical fibers and copper, as well as hybrid cables for transmitting a variety of electrical voltages are known.

Die Gebrauchsmusterschrift DE 20 2005 008 731 U1 beispielsweise zeigt ein Hybridkabel. Es umfasst abgeschirmte elektrische Leiter im Kabelkern zur Energieversorgung und am äußeren Umfang der Schirmung angeordnete Steuersignalleitungen sowie zusätzlich einen Lichtwellenleiter. Die unterschiedlichen Gruppen von Signalleitungen und Energieversorgungsleitungen sind räumlich voneinander getrennt. Soll nun eine der zur Energieversorgung verwendeten Leitungen zur Signalübertragung verwendet werden oder eine der Signalleitungen zur Energieübertragung, so ergeben sich Störeinflüsse zwischen den gegenseitig nicht elektrisch abgeschirmten Leitungen. Die in der Regel von starken elektrischen Feldern umgebenen Energie führenden Leitungen können zur Verfälschung von elektrischen Signalen führen oder bei einem Kurzschluss zwischen den Leitungen sogar zur Zerstörung des angeschlossenen Gerätes.The Utility Model DE 20 2005 008 731 U1 for example, shows a hybrid cable. It comprises shielded electrical conductors in the cable core for supplying energy and control signal lines arranged on the outer circumference of the shield, and additionally an optical waveguide. The different groups of signal lines and power supply lines are spatially separated. If one of the lines used for energy supply is now to be used for signal transmission or one of the signal lines for energy transmission, this results in interference between the mutually not electrically shielded lines. The usually leading from strong electric fields energy leading lines can lead to the falsification of electrical signals or in the event of a short circuit between the lines even to the destruction of the connected device.

Der Erfindung liegt die Aufgabe zugrunde ein Hybridkabel für elektrische Antriebe derart zu gestalten, dass eine bestmögliche Abschirmung zwischen Energieversorgungs- und Signalleitungen realisierbar ist und wobei ein Schutz der angeschlossenen Peripherie bei einem Kurzschluss gewährleistet ist.The invention has for its object to make a hybrid cable for electric drives such that the best possible shielding between power supply and signal lines can be realized and a protection of the connected peripherals is ensured in the event of a short circuit.

Die Erfindung löst diese Aufgabe mittels eines Hybridkabel für elektrische Antriebe mit zumindest einem Signalleiter und Energieleitern zur Versorgung des Antriebes mit elektrischer Energie, sowie zumindest einem Zusatzleiter, wobei der Signalleiter ein elektrischer Leiter ist, der von einem inneren elektrischen Schirmumfasst ist und die Energieleiter und der zumindest eine Zusatzleiter am Umfang der inneren elektrischen Schirmung angeordnet sind, wobei Energieleiter und Zusatzleiter von einem äußeren elektrischen Schirm umgeben sind und wobei zwischen äußerem und inneren Schirm zumindest zwei Schirmleiter derart angeordnet sind, dass eine Abschirmung und eine mechanische Beabstandung zwischen Energieleitern und Zusatzleiter realisierbar ist.The invention solves this problem by means of a hybrid cable for electrical drives with at least one signal conductor and power conductors for supplying the drive with electrical energy, and at least one additional conductor, wherein the signal conductor is an electrical conductor, which is surrounded by an inner electric screen and the energy conductors and the at least one additional conductor are arranged on the circumference of the inner electrical shield, wherein the energy conductor and additional conductor are surrounded by an outer electric screen and wherein between the outer and inner shield at least two shielding conductors are arranged such that a shield and a mechanical spacing between energy conductors and additional conductor can be realized.

Man erhält durch die Erfindung ein Hybridkabel zur Realisierung der Zwischenkreisverdrahtung eines elektrischen Antriebes und zur Herstellung einer Signalverbindung zwischen Steuerung und Antrieb, beispielsweise zur Realisierung einer Führungskommunikation. Der Vorteil der Anordnung liegt zum einen darin, dass anstelle zweier verschiedener Kabel, nämlich eines Kabels zur Energieversorgung und eines Kabels zur Signalversorgung, nun ein einziges Kabel verwendet werden kann. Dies spart Verdrahtungsaufwand und Kosten ein. Die erfindungsgemäße Schirmung bewirkt eine nachträgliche elektrische Abkopplungsmöglichkeit zwischen Niederspannungsleitungen und Energieversorgungsleitungen. Die Zusatzleitungen sind aufgrund der Existenz der Schirmleiter zwischen Niederspannungsleitungen und Energieleitungen auch mechanisch voneinander beabstandet, so dass sowohl ein Kurzschluss zwischen Zusatzleiter und Energieleiter als auch eine gegenseitige Beeinflussung durch elektrische und/oder magnetische Felder weitestgehend ausgeschlossen werden kann. Mögliche Betriebsstörungen der angeschlossenen Peripherie werden damit minimiert und Verdrahtungskosten gesenkt. Die Erfindung liefert außerdem eine gewisse Redundanz bezüglich der Verdrahtung. Diese Redundanz ermöglicht die nachträgliche Verdrahtung eines Antriebs und eine nachträgliche Abschirmung der neu verdrahteten und ein elektrisches Signal führenden Leitungen. Ein mit dem erfindungsgemäßen Hybridkabel verdrahtetes Antriebssystem kann somit sehr flexibel gehandhabt werden.Obtained by the invention, a hybrid cable for the realization of the DC link wiring of an electric drive and for producing a signal connection between the controller and drive, for example, to realize a leadership communication. The advantage of the arrangement is firstly that instead of two different cables, namely a cable for power supply and a cable for signal supply, now a single cable can be used. This saves wiring and costs. The shielding according to the invention effects a subsequent electrical disconnection possibility between low-voltage lines and power supply lines. The additional lines are due to the existence of the shield between low voltage lines and power lines also mechanically spaced apart, so that both a short circuit between additional conductor and power conductor and mutual interference by electrical and / or magnetic fields can be largely excluded. Possible malfunctions of the connected peripherals are thus minimized and wiring costs reduced. The invention also provides some redundancy with regard to wiring. This redundancy allows the subsequent wiring of a drive and a subsequent shielding of the rewired and an electrical signal lines leading. A wired with the hybrid cable according to the invention drive system can thus be handled very flexible.

Werden die Querschnitte der Schirmleiter erhöht und deren Isolierstärken verringert, so verbessert sich die Abschirmung aufgrund eines erhöhten Kupferfüllfaktors. Werden die Schirmleiter durch eine Vielzahl von Leitern mit geringem Querschnitt ersetzt, so wird der Kupferfüllfaktor im Leitungsquerschnitt ebenfalls höher und damit die Abschirmung ebenfalls verbessert.If the cross sections of the shielding conductors are increased and their insulating strengths are reduced, the shielding improves due to an increased copper filling factor. If the shielding conductors are replaced by a large number of conductors with a small cross-section, the copper fill factor in the line cross-section is also higher and the shielding likewise improved.

Vorzugsweise dient der Signalleiter zur Führung von Feldbussignalen. Die Erfindung vermeidet eine Störung der Feldbussignale (Soll- und Istwertübertragung für den Antrieb) und erhöht damit die Betriebssicherheit.Preferably, the signal conductor is used to guide fieldbus signals. The invention avoids a disturbance of the fieldbus signals (command and actual value transmission for the drive) and thus increases operational safety.

Besonders bevorzugt dient der Energieleiter zur Führung einer Zwischenkreisspannung. Insbesondere bei einer Zwischenkreisspannung, bei der es sich in der Regel um eine Gleichspannung handelt, treten starke statische elektrische Felder auf, welche die anderen Signale stören könnten. Ein Kurzschluss zwischen den Energieleitungen und den zum Beispiel für Steuersignale reservierten Zusatzleitungen, würde die Elektronik der angeschlossenen Peripherie zerstören. Die Erfindung beugt einer solchen Zerstörung durch Vermeidung eines Kurzschlusses wie bereits weiter oben erläutert vor.Particularly preferably, the energy conductor serves to guide a DC link voltage. Especially with a DC link voltage, which is usually a DC voltage, strong static electric fields occur, which could disturb the other signals. A short circuit between the power lines and the to Example of control signals reserved auxiliary lines, would destroy the electronics of the connected peripherals. The invention prevents such destruction by avoiding a short circuit as already explained above.

Ganz besonders bevorzugt umfasst der Zusatzleiter mehrere Adern zur Führung von Niederspannungen. Es können somit zusätzlich zu den Signalleitungen weitere Steuer- und Regelsignale übertragen werden, wobei diese optimal gegenüber den von den Energieleitungen herrührenden elektrischen Feldern abkoppelbar sind.Most preferably, the additional conductor comprises a plurality of wires for guiding low voltages. It can thus be transmitted in addition to the signal lines further control and regulating signals, which are optimally decoupled from the electric fields resulting from the power lines.

Weiter bevorzugt sind alle Leiter von einem Außenmantel umgeben. Dieser Außenmantel hält das Kabel mechanisch zusammen und dient gleichzeitig als Isolation und Schutz.More preferably, all conductors are surrounded by an outer sheath. This outer jacket mechanically holds the cable together and at the same time serves as insulation and protection.

Vorzugsweise ist an einem Ende des Kabels ein Steckverbinder (Stecker/Buchse) angeordnet. Das Kabel lässt sich somit lösbar mit dem Antriebsregler und/oder der Peripherie verbinden. Die elektrische Verbindung zwischen den Abschirmungen und den Schirmleitern kann entweder mittels des Steckverbinders durch eine entsprechende Verdrahtung im Steckverbinder selbst realisiert werden, oder auf einer Leiterplatte der angeschlossenen Peripherie.Preferably, a connector (plug / socket) is arranged at one end of the cable. The cable can thus be detachably connected to the drive controller and / or the periphery. The electrical connection between the shields and the shield conductors can be realized either by means of the connector by a corresponding wiring in the connector itself, or on a circuit board of the connected peripherals.

Die Erfindung umfasst ebenfalls einen elektrischen Antrieb mit erfindungsgemäßem Hybridkabel zur Versorgung des Antriebes mit elektrischer Energie und zur Führungskommunikation, wobei der äußere und innere Schirm und die Erdleitungen auf gleichem elektrischen Potential liegen, so dass eine elektrische Abschirmung der Energieleiter gegenüber der Zusatzleiter bewirkt wird. Der Antrieb lässt sich einfach verdrahten, so dass Energieversorgung und Führungskommunikation gewährleistet und eine Betriebsbereitschaft schnell hergestellt ist. Zusätzlich sind die elektrische Schaltkreise des Antriebs gegen Überspannungen geschützt. Eine nachträgliche Verdrahtung und elektrische Abschirmung, z.B. bei Anschluss einer Feedbackeinheit, ist jederzeit möglich.The invention also includes an electric drive with hybrid cable according to the invention for supplying the drive with electrical energy and for leadership communication, wherein the outer and inner shield and the ground lines are at the same electrical potential, so that an electrical shielding of the energy conductor is effected relative to the additional conductor. The drive can be easily wired so that power supply and management communication is ensured and operational readiness is quickly established. In addition, the electrical circuits of the drive are protected against overvoltages. Subsequent wiring and electrical shielding, eg when connecting a feedback unit, is possible at any time.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11 ZwischenkreisadernDC wires 22 Schirmleitershieldwires 33 Zusatzleiteradditional conductor 44 Signalleitersignal conductor 55 Innere SchirmungInner shielding 66 Äußere SchirmungExternal shielding 77 Außenmantelouter sheath 88th Hybridkabelhybrid cable 99 Potentialleiterpotential conductor

Figur 1 zeigt ein erfindungsgemäßes Hybridkabel 8 im Querschnitt. Im Detail sind gezeigt ein Außenmantel 7, eine äußere Schirmung 6, Energieleiter 1, Schirmleiter 2, Zusatzleiter 3, eine innere Schirmung 5 und Signalleitungen 4.FIG. 1 shows a hybrid cable 8 according to the invention in cross section. In detail, an outer sheath 7, an outer shield 6, power conductor 1, shield conductor 2, additional conductor 3, an inner shield 5 and signal lines 4 are shown.

Das erfindungsgemäße Hybridkabel 8 ist ähnlich wie ein Koaxialkabel aufgebaut. Der innere Leiter besteht in diesem Falle aus mehreren Signalleitungen 4, welche von einer inneren Abschirmung 5 umgeben sind. Zwischen dieser inneren Abschirmung 5 und der äußeren Abschirmung 6 sind entlang des äußeren Umfangs der inneren Abschirmung 4 weitere Leiter 1, 2,3 verteilt angeordnet. Diese Leiter 1,2,3 dienen zum einen der Energieübertragung, d.h. zum Betrieb eines mittels des Hybridkabels 8 mit einer Energieversorgung angeschlossenen elektrischen Gerätes, als auch zur Übertragung von Niederspannung (Beispielsweise Steuersignale) mittels der Zusatzleitungen 3. Die zwischen den Energieversorgungsleitungen 1 und Niederspannungsadern 3 angeordneten Schirmleiter 2 dienen zur mechanischen Beabstandung und elektrischen Abschirmung der Energieleitungen 1 gegenüber der Niederspannungsadern 3. Die mechanische Beabstandung ist aufgrund der Abmessungen der Schirmleiter gewährleistet, welche den radialen Zwischenraum zwischen innerer und äußerer Abschirmung im wesentlichen vollständig ausfüllen. Im Falle eines Kabelbruches der Energieleitungen 1 ist somit ein Kurzschluss zwischen der Energieleitung 1 und einer Zusatzleitung 3 schon alleine aufgrund der Existent der Schirmleiter 2 ausgeschlossen. Legt man die Erdleitungen 2 auf ein gleiches elektrisches Potential wie die Abschirmungen 4, 5, vorzugsweise 0 Volt oder Masse, so finden die von den Energieleitungen 1 ausgehenden elektrischen Feldlinien ihren Endpunkt am Schirmleiter 2 und an den umliegenden Abschirmungen 4, 5. Die Zusatzleitungen sind daher dem' von den Energieleitungen 1 ausgehenden elektrischen Feldern nicht mehr ausgesetzt. Eine gegenseitige elektrische Beeinflussung wird weitestgehend vermieden. Erhöht man die Kupferdichte mit Erdpotential zwischen dem Energieleiter 1 und den Zusatzleitern 3, beispielsweise durch Reduzierung des Isolierwandstärke und/oder durch vergrößerten Querschnitt des Schirmleiters 2, so wird der Abschirmeffekt verbessert. Auch könnte man einen einzigen Schirmleiter 2 durch mehrere Schirmleiter 2 kleineren Leitungsquerschnitts ersetzen.The hybrid cable 8 according to the invention is constructed similar to a coaxial cable. The inner conductor consists in this case of a plurality of signal lines 4, which are surrounded by an inner shield 5. Between this inner shield 5 and the outer shield 6, further conductors 1, 2, 3 are distributed along the outer circumference of the inner shield 4. These conductors 1, 2, 3 serve to transfer energy, i. for operating an electrical device connected by means of the hybrid cable 8 to a power supply, as well as for transmitting low voltage (for example control signals) by means of the additional lines 3. The shielding conductors 2 arranged between the power supply lines 1 and low-voltage wires 3 are used for mechanical spacing and electrical shielding of the power lines 1 3. The mechanical spacing is ensured by the dimensions of the shielding conductors, which substantially completely fill the radial gap between the inner and outer shields. In the case of a cable break of the power lines 1, therefore, a short circuit between the power line 1 and an additional line 3 is already excluded, solely because of the existence of the shield conductor 2. If the ground lines 2 are connected to the same electrical potential as the shields 4, 5, preferably 0 volts or ground, then the electric field lines emanating from the power lines 1 find their end point on the shield conductor 2 and on the surrounding shields 4, 5. The additional lines are therefore no longer exposed to the electric fields emanating from the power lines 1. Mutual electrical interference is largely avoided. Increasing the copper density with ground potential between the energy conductor 1 and the additional conductors 3, for example by reducing the Isolierwandstärke and / or by increased cross-section of the shielding conductor 2, the shielding effect is improved. Also, one could replace a single shielding conductor 2 by a plurality of shielding conductors 2 smaller cross-section.

In der erfindungsgemäßen Anwendung dient der Signalleiter 4 zur Führung von Feldbussignalen und der Energieleiter 1 zur Führung der Zwischenkreisgleichspannung zur Versorgung eines Antriebsreglers mit elektrischer Energie. Die Zusatzleiter 3 dienen zusätzlich zur Führung von Niederspannungen (z.B. Feedbacksignale). Es können somit zusätzlich zu den Signalleitungen 4 weitere Steuer- und Regelsignale übertragen werden, wobei diese mittels der Schirmleiter 2 optimal gegenüber den von den Energieleitungen 1 herrührenden elektrischen Feldern abkoppelbar sind. Der Außenmantel 7 verfestigt das Kabel mechanisch und dient gleichzeitig als Isolation und Schutz. Das erfindungsgemäße Hybridkabel 8 umfasst zumindest an einem Ende des Kabels einen Steckverbinder (Stecker oder Buchse) zum Anschluss an den Antriebsregler. Die Potentiale der Schirmleiter 2 und der Abschirmungen werden in der Regel auf einer Platine des Antriebsreglers hergestellt. Auch innerhalb der Steckverbindung könnten die Potentiale zusammengeführt werden.In the application according to the invention, the signal conductor 4 serves to guide fieldbus signals and the energy conductor 1 to guide the intermediate circuit DC voltage to supply a drive controller with electrical energy. The additional conductors 3 additionally serve to guide low voltages (eg feedback signals). Thus, in addition to the signal lines 4, further control and regulating signals can be transmitted, whereby these can be decoupled optimally by means of the shielding conductor 2 with respect to the electric fields originating from the power lines 1. The outer shell 7 solidifies the Cable mechanically and at the same time serves as insulation and protection. The hybrid cable 8 according to the invention comprises at least at one end of the cable a connector (plug or socket) for connection to the drive controller. The potentials of the shielding conductor 2 and the shields are usually produced on a circuit board of the drive controller. Even within the connector, the potentials could be merged.

Figur 2 zeigt den erfindungsgemäßen Effekt am in Figur 1 gezeigten Kabel. Die Erfindung bewirkt die Ausbildung von Potentiallinien 9, welche zur verbesserten Abschirmung führen.FIG. 2 shows the effect according to the invention on the cable shown in FIG. The invention causes the formation of potential lines 9, which lead to improved shielding.

Claims (7)

Hybridkabel für elektrische Antriebe mit zumindest einem Signalleiter (4) und Energieleitern (1) zur Versorgung des Antriebes mit elektrischer Energie, sowie zumindest einem Zusatzleiter (3), dadurch gekennzeichnet, dass der Signalleiter (4) ein elektrischer Leiter ist, der von einem inneren elektrischen Schirm (5) umfasst ist und die Energieleiter (1) und der zumindest eine Zusatzleiter (3) am Umfang der inneren elektrischen Schirmung (5) angeordnet sind, wobei Energieleiter (1) und Zusatzleiter (3) von einem äußeren elektrischen Schirm (6) umgeben sind und wobei zwischen äußerem und inneren Schirm (5,6) zumindest zwei Schirmleiter (2) derart angeordnet sind, dass eine verbesserte Abschirmung und mechanische Beabstandung zwischen Energieleitern (1) und Zusatzleiter (3) realisierbar ist.Hybrid cable for electric drives with at least one signal conductor (4) and energy conductors (1) for supplying the drive with electrical energy, and at least one additional conductor (3), characterized in that the signal conductor (4) is an electrical conductor which is of an inner electric screen (5) and the energy conductor (1) and the at least one additional conductor (3) are arranged on the circumference of the inner electrical shield (5), wherein the energy conductor (1) and additional conductor (3) from an outer electric screen (6 ) are surrounded and wherein between the outer and inner screen (5,6) at least two shield conductor (2) are arranged such that an improved shielding and mechanical spacing between the energy conductors (1) and additional conductor (3) can be realized. Hybridkabel nach Anspruch 1, wobei der Signalleiter (4) zur Führung von Feldbussignalen dient.Hybrid cable according to claim 1, wherein the signal conductor (4) is used to guide fieldbus signals. Hybridkabel nach einem der vorhergehenden Ansprüche, wobei der Energieleiter (1) zur Führung einer Zwischenkreisspannung dient.Hybrid cable according to one of the preceding claims, wherein the energy conductor (1) serves to guide a DC link voltage. Hybridkabel nach einem der vorhergehenden Ansprüche, wobei der Zusatzleiter (3) mehrere Adern zur Führung von Niederspannungen umfasst.Hybrid cable according to one of the preceding claims, wherein the additional conductor (3) comprises a plurality of wires for guiding low voltages. Hybridkabel nach einem der vorhergehenden Ansprüche, wobei alle Leiter (1, 2, 3, 4) von einem gemeinsamen Außenmantel (7) umgeben sind.Hybrid cable according to one of the preceding claims, wherein all conductors (1, 2, 3, 4) are surrounded by a common outer jacket (7). Hybridkabel nach einem der vorhergehenden Ansprüche, wobei an einem Ende des Kabels (8) ein Steckverbinder angeordnet ist.Hybrid cable according to one of the preceding claims, wherein at one end of the cable (8), a connector is arranged. Elektrischer Antrieb mit Hybridkabel (8) nach einem der vorhergehenden Ansprüche zur Versorgung des Antriebes mit elektrischer Energie und zur Führungskommunikation, wobei der äußere und innere Schirm (5, 6) und die Erdleitungen (2) auf gleichem elektrischen Potential liegen, so dass eine verbesserte elektrische Abschirmung der Energieleiter (1) gegenüber der Zusatzleiter (3) bewirkt wird.Electric drive with hybrid cable (8) according to one of the preceding claims for supplying the drive with electrical energy and for leadership communication, wherein the outer and inner shield (5, 6) and the ground lines (2) are at the same electrical potential, so that an improved electrical shielding of the energy conductor (1) relative to the additional conductor (3) is effected.
EP07010325.4A 2006-06-30 2007-05-24 Hybrid cable Not-in-force EP1873791B1 (en)

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US7592549B2 (en) 2009-09-22
US20080041622A1 (en) 2008-02-21
EP1873791A3 (en) 2014-12-17
DE102006030180A1 (en) 2008-01-03
EP1873791B1 (en) 2018-08-29

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