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EP2201584B2 - Dispositif de couplage - Google Patents
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EP2201584B2 - Dispositif de couplage - Google Patents

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Publication number
EP2201584B2
EP2201584B2 EP08801758.7A EP08801758A EP2201584B2 EP 2201584 B2 EP2201584 B2 EP 2201584B2 EP 08801758 A EP08801758 A EP 08801758A EP 2201584 B2 EP2201584 B2 EP 2201584B2
Authority
EP
European Patent Office
Prior art keywords
coupling
housing part
electrically conductive
capacitive
coupling device
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.)
Active
Application number
EP08801758.7A
Other languages
German (de)
English (en)
Other versions
EP2201584B1 (fr
EP2201584A1 (fr
Inventor
Zhidong Hua
Olaf Simon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEW Eurodrive GmbH and Co KG
Original Assignee
SEW Eurodrive GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Publication of EP2201584A1 publication Critical patent/EP2201584A1/fr
Application granted granted Critical
Publication of EP2201584B1 publication Critical patent/EP2201584B1/fr
Publication of EP2201584B2 publication Critical patent/EP2201584B2/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/18—Rotary transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F2027/348—Preventing eddy currents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H01F2038/146—Inductive couplings in combination with capacitive coupling

Definitions

  • the invention relates to a coupling device for a system for contactless energy and data transmission.
  • From the DE 199 32 504 A1 is a realization of a contactless energy and data transmission of two mutually rotatable parts, in which two or more coils are rotatably mounted, at least one of the coils being in one half, which has an L-shaped cross section.
  • the device discloses (column 4, lines 18-42, FIGS. 10-12) transmitters and receivers which can be driven to rotate concentrically with one another. Both parts contain both flat conductor loops, which act as coils for inductive coupling, and coupling capacitors in the form of metal foils. Both coupling devices are housed together within a shielding housing.
  • the invention is based on the object of developing a system with contactless energy and data transmission, the error rate of the transmission being reduced.
  • a first pair of coupling surfaces is formed on the first housing part and a second pair of coupling surfaces is formed on the second housing part, a contact surface of the first pair each forming a capacitive coupling element with a contact surface of the second pair.
  • the magnetic shield is preferably arranged between the inductive coupling element and the capacitive coupling elements.
  • the coupling surfaces are formed by metallic, ring-shaped bands, the surface of which is arranged radially to the axis of rotation.
  • the capacitive coupling elements are thus functional independently of the rotational position because the electrical coupling surfaces emulate the rotational symmetry of the coupling device.
  • the coupling surfaces of each pair are arranged on a common, imaginary cylinder. A compact size is thus provided.
  • the turns of the primary winding and the secondary winding each run around the axis of rotation.
  • the primary winding and the secondary winding are each connected to a plug which has a pull-out protection. So is one high current, for example of more than 10 A, can be transmitted, and the system has increased safety.
  • the inductive coupling element is arranged radially within the capacitive coupling elements.
  • the advantage here is that the inductive coupling element can be implemented with a small footprint and that the capacitive coupling can be implemented inexpensively.
  • each contact surface has a ring width of 1 cm to 3 cm, in particular 2 cm.
  • the coupling surfaces of each capacitive coupling device are preferably spaced apart by 0.5 cm to 2 cm, in particular 1 cm. Particularly favorable conditions for data transmission are thus achieved.
  • the coupling surfaces of the capacitive coupling devices each form an electrically conductive ring which is electrically severed at one point. Circulating eddy currents, which would be induced in the capacitor surfaces of the capacitive coupling elements by the inductive coupling element, are thus interrupted.
  • the coupling surfaces of the capacitive coupling devices are each connected to connecting means in the middle between the ends formed by the severing. Good data coupling is thus achieved.
  • the coupling surfaces of the capacitive coupling devices have gaps or incisions running transversely in the circumferential direction. Eddy currents which would be induced in the capacitor areas of the capacitive coupling elements by the inductive coupling element are thus further reduced.
  • the coupling surfaces are each fastened on an electrically insulating base. This enables undisturbed data transmission via the communication channel formed by the coupling surfaces.
  • Figure 1 shows a rotary transformer 1 according to the invention.
  • a first housing part 2 is connected to a second housing part 3 by a connecting ring 4.
  • the first housing part 2 and the second housing part 3 can be rotated relative to one another about the axis of the connecting ring 4.
  • connection box 5 is formed on each of the first housing part 2 and the second housing part 3.
  • a connector 6 for heavy current, that is to say for more than 10 A, and a BNC connector 8 for connecting a high-frequency line are formed on each connection box 5.
  • a foldable bracket on the plug 6 forms a pull-out protection 7 for the plug of the power line.
  • the first housing part 2 and the second housing part 3 are made of plastic.
  • Figure 2 shows an axial section through the rotary transformer Figure 1 .
  • the connecting ring 4 is connected to a hollow shaft 10 by screws 9. This forms a bearing in which the first housing part 2 and the second housing part 3 are rotatably arranged.
  • the plug 6 is connected by lines, not shown, to connections 22, which in turn are connected to the two ends of a primary winding 20.
  • the windings of the primary winding 20 run around the axis of rotation of the rotary transformer.
  • a magnetic field which passes through a secondary winding 21 running in a ring around the axis of rotation and induces a current in the secondary winding 21.
  • the secondary winding 21 is fixedly connected to the second housing part and connected to an in via connections and conductors, not shown Figure 2 not visible connector 6 connected.
  • Primary winding 20 and secondary winding 21 have a common axis.
  • the primary winding and secondary winding thus form an inductive coupling element, and energy can be transmitted inductively via the swivel joint.
  • An air gap 24 is set up between the primary winding 20 and the secondary winding 21, which enables the first and second housing parts to be rotated relative to one another.
  • Primary winding 20 and secondary winding 21 are each encompassed by cross-sectionally U-shaped, annular trough-shaped shields 23, the openings of which face one another.
  • the magnetic field generated by the primary winding and the secondary winding is enclosed and essentially does not come out of the ring area enclosed by the shields 23.
  • a ring insert 25 which is concentric with the axis of rotation, is formed on the first housing part 2, on the inside of which a pair of annular copper strips 26, 27 are attached.
  • the copper strips 26, 27 are electrically connected to the two connections of the BNC connection 8 in the connection box 5 of the first housing part 2.
  • a second concentrically extending ring insert 31 is formed on the second housing part 3, on the outside of which a further pair of ring-shaped copper strips 28, 29 is arranged.
  • the copper strips 28, 29 are electrically connected to the two connections of the BNC connection 8 in the connection box 5 of the second housing part 3.
  • the ring inserts 25, 31 are arranged concentrically one inside the other and thus allow an unrestricted rotary movement of the rotary connector.
  • the copper strips 26, 27, 28, 29 are aligned radially, that is to say the normal to the surface points in each case in the radial direction with respect to the axis of rotation.
  • the copper bands 26 and 28 are arranged opposite one another in the same axial position and thus form a capacitive coupling element in the form of a capacitor.
  • the copper strips 27 and 29 are arranged opposite one another in the same axial position and thus form a second capacitive coupling element in the form of a capacitor.
  • the two capacitive coupling elements operated in parallel enable RF signals to be transmitted from the BNC connector 8 of the first housing part 2 to the BNC connector 8 of the second housing part 3 in a contactless manner, regardless of the rotational position of the rotary transmitter.
  • the ring width of the copper strips 26, 27, 28, 29 used is 2 cm, the copper strips 26, 27, 28, 29 of each capacitive coupling element are 1 cm apart.
  • Figure 3 showed another embodiment of a rotary transmitter according to the invention.
  • a sectional view of one side of the rotary transmitter is shown.
  • the axis of rotation 31 is indicated by a chain line.
  • the representation of the bearings and the electrical connections has been suppressed to improve the clarity of the drawing.
  • An annular trough 33 made of ferromagnetic material is let into a first housing part 2.
  • the primary winding 32 is wound into this trough 33.
  • An annular carrier 35 engages with the secondary winding 34 in the space enclosed by the trough 33.
  • the primary winding 32 is thus arranged radially within the secondary winding 35.
  • the ring-shaped carrier 35 is fastened to the second housing part 3.
  • a cover 36 made of ferromagnetic material is worked into the second housing part 3 and closes the trough 33 in a ring shape.
  • the interior of the trough 33 which receives the primary winding 32 and the secondary winding 34, is magnetically sealed off from the outside area.
  • the first housing part 2 and the second housing part 3 are rotatably supported relative to one another about the axis of rotation 31.
  • a gap 37 is formed between the housing parts, which has an axially running, rotationally symmetrical region 38 and ends in a labyrinth seal 30.
  • a first pair of copper strips 26, 27 is embedded in the side walls of area 38 and, opposite the pair of copper strips 26, 27, a second pair of copper strips 28, 29.
  • the copper strips 26, 27, 28, 29 are fastened on an electrically non-conductive base and electrically isolated from each other and from the environment.
  • a first copper strip 26 of the first pair thus forms, together with a first copper strip 28 of the second pair, a capacitor and thus a first capacitive coupling element.
  • the second copper strip 27 of the first pair, together with the second copper strip 29 of the second pair forms a capacitor and thus a second capacitive coupling element.
  • Air is arranged between the two copper strips belonging to each capacitive coupling element.
  • the first capacitive coupling element and the second capacitive coupling element jointly form a transmission channel for data transmission.
  • the copper strips 26, 27, 28, 29 of the rotary transformer are designed in such a way that the lowest possible eddy currents are induced by the inductive coupling element.
  • FIG. 4a shows a first example of such a development, which is not included in the invention.
  • transverse strips 42 made of copper are arranged on a longitudinal strip 41 made of copper and electrically connected thereto, so that gaps 43 are formed between the transverse strips 42. These gaps reduce induced eddy currents in the copper strip 40.
  • the copper strip 40 is assembled at the ends 44 to form an annular copper band.
  • ends 44 become one but one Gap assembled so that no circular currents can flow along the longitudinal strip 41.
  • Figure 4b shows an exemplary embodiment according to the invention for a further development of the copper strips 26, 27, 28, 29.
  • cuts 45 are alternately made laterally in the longitudinal direction, so that overall a meandering conductor results.
  • the copper strip 40 is assembled at the ends 44 to form an annular copper band.
  • the ends 44 are put together except for a gap, so that no circular currents can flow along the copper strip 40.
  • Figure 5 shows the basic circuit diagram of a contactless energy and data transmission via a freely rotatable coupling.
  • a rotary transmitter 61 designed as a transmitter head comprises a primary side 56 and a secondary side 57 of a transformer, which are arranged such that they can be rotated relative to one another.
  • the transformer forms the inductive coupling element for contactless power transmission.
  • the primary side 56 is fed from a generator 54 with a constant alternating current with a current of 10 A or 60 A and a frequency of 25 kHz. Other frequencies between 10 kHz and 200 kHz can also be provided.
  • the rectifier comprises a resonant circuit whose resonant frequency is matched to the frequency of the alternating current fed in.
  • the rectifier 55 supplies a consumer 60, for example a converter or a motor or an electronic circuit.
  • the generator 54 also supplies a modem 50 and a transceiver 52.
  • the modem 50 receives data via a line (not shown) and passes this on to the transceiver 52 as signals.
  • the transceiver 52 amplifies the signals.
  • the rotary transformer 61 comprises a first capacitor 58 and a second capacitor 59.
  • the capacitors 58, 59 form the capacitive coupling elements of a transmission channel for data transmission.
  • the capacitors 58, 59 are each designed such that the two plates are movable relative to one another.
  • Signals can be transmitted from the transceiver 52 to the transceiver 53 and vice versa via the capacitors 58, 59 arranged in parallel. A return via a ground line is not necessary. This reduces the susceptibility to faults.
  • the transceiver 53 is fed from the alternating current transmitted via the inductive coupling element, in particular from the rectifier 55.
  • the signals come from the transceiver 53 to the modem 51, which is also supplied by the rectifier 55.
  • the modem 51 can send data to the transceiver 53 that is received in the modem 50.
  • a bidirectional data exchange is thus provided via a movable coupling device, an inductive coupling for energy being provided in parallel with the coupling for the data exchange, from which a consumer and the transceivers 52, 53 and / or the modems 50, 51 are supplied.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Near-Field Transmission Systems (AREA)

Claims (11)

  1. Dispositif de couplage
    comprenant une première partie de boîtier et une seconde partie de boîtier montées à rotation l'une par rapport à l'autre autour d'un axe, sachant
    - qu'un enroulement primaire et un enroulement secondaire forment un élément de couplage inductif,
    ledit enroulement primaire étant agencé concentriquement à l'axe sur ladite première partie du boîtier
    et ledit enroulement secondaire étant agencé concentriquement audit axe sur ladite seconde partie du boîtier,
    - une surface électriquement conductrice, ménagée sur ladite première partie du boîtier en tant que première surface de couplage,
    et une surface électriquement conductrice, ménagée sur ladite seconde partie du boîtier en tant que seconde surface de couplage,
    formant associativement un élément de couplage capacitif,
    l'élément de couplage inductif étant entouré d'un blindage magnétique,
    les éléments de couplage capacitif étant placés à l'extérieur du blindage magnétique dudit élément de couplage inductif,
    caractérisé par le fait que
    les surfaces de couplage des éléments de couplage capacitif sont réalisées, à chaque fois, sous la forme d'un anneau électriquement conducteur, sectionné électriquement en un emplacement,
    lesdites surfaces de couplage desdits éléments de couplage capacitif étant respectivement connectées à des moyens de raccordement, au centre, entre les extrémités formées par le sectionnement,
    lesdites surfaces de couplage étant constituées par des bandes annulaires métalliques dont la surface est agencée, à chaque fois, radialement par rapport à l'axe de rotation,
    sachant que lesdites surfaces de couplage des éléments de couplage capacitif comportent des entailles alternées s'étendant transversalement dans le sens périphérique, de façon telle que la surface de couplage considérée soit réalisée en tant que bande de cuivre en forme de méandres.
  2. Dispositif de couplage selon la revendication 1,
    caractérisé par le fait que
    - des surfaces électriquement conductrices forment une première paire de surfaces de couplage sur la première partie du boîtier
    et des surfaces électriquement conductrices forment une seconde paire de surfaces de couplage sur la seconde partie dudit boîtier,
    sachant qu'une surface respective électriquement conductrice, notamment une surface de couplage de la première paire, forme un élément de couplage capacitif avec une surface électriquement conductrice, notamment une surface de couplage de la seconde paire.
  3. Dispositif de couplage selon l'une des revendications précédentes,
    caractérisé par le fait que
    les parties du boîtier sont fabriquées en matière plastique, ou
    un matériau électriquement isolant est prévu entre lesdites parties du boîtier et les surfaces respectives électriquement conductrices.
  4. Dispositif de couplage selon l'une des revendications précédentes,
    caractérisé par le fait que
    le blindage magnétique est interposé entre l'élément de couplage inductif et les éléments de couplage capacitif.
  5. Dispositif de couplage selon l'une des revendications précédentes,
    caractérisé par le fait que
    les surfaces de couplage de chaque paire se trouvent sur un cylindre virtuel commun.
  6. Dispositif de couplage selon l'une des revendications précédentes,
    caractérisé par le fait que
    les spires de l'enroulement primaire et de l'enroulement secondaire s'étendent, à chaque fois, autour de l'axe de rotation.
  7. Dispositif de couplage selon au moins l'une des revendications précédentes,
    caractérisé par le fait que
    l'enroulement primaire et l'enroulement secondaire sont connectés, respectivement, à une fiche pourvue d'une sécurité anti-déboîtement.
  8. Dispositif de couplage selon au moins l'une des revendications précédentes,
    caractérisé par le fait que
    l'élément de couplage inductif est logé radialement à l'intérieur des éléments de couplage capacitif.
  9. Dispositif de couplage selon au moins l'une des revendications précédentes,
    caractérisé par le fait que
    chaque surface de contact présente une largeur d'anneau de 1 cm à 3 cm, notamment de 2 cm.
  10. Dispositif de couplage selon au moins l'une des revendications précédentes,
    caractérisé par le fait que
    les surfaces de couplage de chaque élément de couplage capacitif sont espacées de 0,5 cm à 2 cm, notamment de 1 cm.
  11. Dispositif de couplage selon la revendication précédente,
    caractérisé par le fait que
    les surfaces de couplage sont fixées, à chaque fois, sur une structure sous-jacente électriquement isolante.
EP08801758.7A 2007-09-10 2008-08-29 Dispositif de couplage Active EP2201584B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007042659.5A DE102007042659C5 (de) 2007-09-10 2007-09-10 Koppeleinrichtung
PCT/EP2008/007079 WO2009033573A1 (fr) 2007-09-10 2008-08-29 Dispositif de couplage

Publications (3)

Publication Number Publication Date
EP2201584A1 EP2201584A1 (fr) 2010-06-30
EP2201584B1 EP2201584B1 (fr) 2017-07-26
EP2201584B2 true EP2201584B2 (fr) 2020-07-22

Family

ID=39925021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08801758.7A Active EP2201584B2 (fr) 2007-09-10 2008-08-29 Dispositif de couplage

Country Status (3)

Country Link
EP (1) EP2201584B2 (fr)
DE (1) DE102007042659C5 (fr)
WO (1) WO2009033573A1 (fr)

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WO2024003898A1 (fr) * 2022-06-27 2024-01-04 Irp Nexus Group Ltd Procédé de commande de transfert de puissance dans un transformateur rotatif

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EP2621341B1 (fr) 2010-09-28 2017-04-26 Schleifring und Apparatebau GmbH Joint rotatif sans contact
EP2688078A1 (fr) 2012-07-17 2014-01-22 Stichting Nationaal Lucht- en Ruimtevaart Laboratorium Alimentation et transfert de données sans contact
GB2506192A (en) 2012-09-25 2014-03-26 Bae Systems Plc Optical rotating joint having drive shaft with a hollow central bore
DE102014105261B3 (de) * 2014-04-14 2015-02-19 Sick Ag Optoelektronischer Sensor und Verfahren zur Erfassung von Objekten in einem Überwachungsbereich
CN106415751A (zh) 2014-05-23 2017-02-15 I.M.A.工业机械自动化股份公司 配备有用于非接触式电力传输的设备的工作单元和工作单元中用于非接触式电力传输的方法
DE102015103823A1 (de) 2015-03-16 2016-09-22 Sick Ag Vorrichtung zur Übertragung von Daten und Energie zwischen zwei sich relativ zueinander bewegenden Gegenständen
DE102015121452B3 (de) * 2015-12-09 2017-05-11 Sick Ag Vorrichtung zur kontaktlosen Übertragung von Daten und zur Ermittlung einer Winkeländerung zwischen zwei sich relativ zueinander bewegenden Gegenständen
DE102018107150A1 (de) * 2018-03-26 2019-09-26 Wittenstein Se Getriebe, Motor-Getriebe-Kombination und Welle-Getriebe-Kombination
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US4674814A (en) † 1985-07-08 1987-06-23 Japan Aviation Electronics Industry Limited Connector assembly
CA2071681A1 (fr) † 1991-06-22 1992-12-23 Hans Jurgen Bossler Appareil de transmission de l'alimentation electrique et de donnees pour vehicules motorises
US5814900A (en) † 1991-07-30 1998-09-29 Ulrich Schwan Device for combined transmission of energy and electric signals
EP1337001A1 (fr) † 1997-01-03 2003-08-20 Schleifring und Apparatebau GmbH Dispositif pour la transmission sans contact des signaux électriques et/ou énergie
JP2002198238A (ja) † 2000-12-26 2002-07-12 Yazaki Corp 回転接続部の電力・信号伝送装置
EP1241058A2 (fr) † 2001-03-16 2002-09-18 Tamagawa Seiki Kabushiki Kaisha Connecteur rotatif sans contact et connecteur non-rotatif sans contact
US7425096B2 (en) † 2004-07-22 2008-09-16 Siemens Aktiengesellschaft Gantry for an X-ray device
CA2673298A1 (fr) † 2006-12-20 2008-07-03 Analogic Corporation Systeme rotatif de transfert d'energie sans contact

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024003898A1 (fr) * 2022-06-27 2024-01-04 Irp Nexus Group Ltd Procédé de commande de transfert de puissance dans un transformateur rotatif
IL294352B1 (en) * 2022-06-27 2025-10-01 Irp Nexus Group Ltd Method for controlling power transfer in a rotating transformer
IL294352B2 (en) * 2022-06-27 2026-02-01 Irp Nexus Group Ltd Method for controlling power transfer in a rotating transformer

Also Published As

Publication number Publication date
DE102007042659A1 (de) 2009-03-26
DE102007042659C5 (de) 2016-01-21
EP2201584B1 (fr) 2017-07-26
DE102007042659B4 (de) 2012-09-13
WO2009033573A1 (fr) 2009-03-19
EP2201584A1 (fr) 2010-06-30

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