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WO2009033573A1 - Dispositif de couplage - Google Patents

Dispositif de couplage Download PDF

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Publication number
WO2009033573A1
WO2009033573A1 PCT/EP2008/007079 EP2008007079W WO2009033573A1 WO 2009033573 A1 WO2009033573 A1 WO 2009033573A1 EP 2008007079 W EP2008007079 W EP 2008007079W WO 2009033573 A1 WO2009033573 A1 WO 2009033573A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling
coupling device
housing part
electrically conductive
capacitive
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.)
Ceased
Application number
PCT/EP2008/007079
Other languages
German (de)
English (en)
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39925021&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2009033573(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Priority to EP08801758.7A priority Critical patent/EP2201584B2/fr
Publication of WO2009033573A1 publication Critical patent/WO2009033573A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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.
  • the invention has the object of developing a system with contactless energy and data transmission, the error rate of the transmission is reduced.
  • a first housing part and a second housing part are provided which are rotatably supported relative to each other about an axis, wherein a primary winding and a secondary winding form an inductive coupling element, wherein the primary winding on the first housing part concentric to the axis is arranged and the secondary winding is arranged on the second housing part concentric with the axis,
  • An electrically conductive coupling surface is formed on the first housing part and on the second housing part an electrically conductive coupling surface is formed, which together form a capacitive coupling element.
  • a first pair of coupling surfaces and on the second housing parts, a second pair of coupling surfaces is formed on the first housing part, wherein each form a contact surface of the first pair with a contact surface of the second pair a capacitive coupling element.
  • the inductive coupling element is surrounded by a magnetic shield.
  • the magnetic shield between inductive coupling element and capacitive coupling elements is arranged.
  • the coupling surfaces are formed by metallic, annular bands whose surface is arranged in each case radially to the axis of rotation.
  • the capacitive coupling elements are functional independently of the rotational position, because the electrical coupling surfaces simulate the rotational symmetry of the coupling device.
  • the coupling surfaces of each pair are arranged on a common, imaginary cylinder.
  • a compact size is provided.
  • the turns of the primary winding and the secondary winding each extend about the axis of rotation.
  • the primary winding and the secondary winding are each connected to a plug which has a pull-out protection.
  • a high current for example, of more than 10 A, transferable, and the system has increased security.
  • the inductive coupling element is arranged radially within the capacitive coupling elements.
  • 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 0.5 cm to 2 cm, in particular 1 cm, spaced.
  • particularly favorable conditions for data transmission are 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 that would be induced in the capacitor surfaces of the capacitive coupling elements of the inductive coupling element, interrupted.
  • the coupling surfaces of the capacitive coupling devices are each connected in the middle between the ends formed by the transection with connection means.
  • Coupling devices in the circumferential direction transverse gaps or cuts.
  • eddy currents that would be induced in the capacitor surfaces of the capacitive coupling elements of the inductive coupling element further reduced.
  • the coupling surfaces are each mounted on an electrically insulating pad.
  • an undisturbed data transmission over the communication channel formed by the coupling surfaces is made possible.
  • Figure 1 shows a rotary transformer according to the invention
  • Figure 2 is a sectional view through the rotary transformer of Figure 1
  • Figure 3 is a sectional view through another rotary transformer
  • Figure 4a is a copper strip for a coupling element of a rotary transformer
  • Figure 4b shows another copper strip for a coupling element of a rotary transformer
  • FIG 5 shows the electronic block diagram of a rotary transformer.
  • FIG. 1 shows a rotary transformer 1 according to the invention.
  • a first housing part 2 is connected by a connecting ring 4 to a second housing part 3.
  • First housing part 2 and second housing part 3 are rotatable about the axis of the connecting ring 4 against each other.
  • a terminal box 5 is formed on the first housing part 2 and the second housing part 3.
  • a plug 6 for power ie for more than 1OA, formed and a BNC connector 8 for connecting a high-frequency line.
  • a hinged bracket on the plug 6 forms a pull-out fuse 7 for the plug of the power line.
  • First housing part 2 and second housing part 3 are made of plastic.
  • FIG. 2 shows an axial section through the rotary transformer according to FIG. 1.
  • the connecting ring 4 is connected by screws 9 with a hollow shaft 10. In this way, a bearing is formed, in which the first housing part 2 and the second housing part 3 are rotatably arranged.
  • the plug 6 is connected by leads, not shown, with terminals 22, which in turn are connected to the two ends of a primary winding 20.
  • the windings of the primary winding 20 extend around the axis of rotation of the rotary transformer.
  • Magnetic field which passes through a ring-shaped extending around the axis of rotation secondary winding 21 and induces a current in the secondary winding 21.
  • the secondary winding 21 is fixedly connected to the second housing part and connected via terminals and not shown conductor with a not visible in Figure 2 connector 6.
  • Primary winding 20 and secondary winding 21 have a common axis.
  • the primary winding and the secondary winding form an inductive coupling element, and it is energy contactless inductively transmittable across the hinge.
  • an air gap 24 is arranged, which allows the relative rotatability of the first and second housing part.
  • Primary winding 20 and secondary winding 21 are each of U-shaped in cross-section, annular-trough-shaped shields 23, whose openings are facing each other. Thus, the magnetic field generated by the primary winding and the secondary winding is included and substantially does not come out of the annular region enclosed by the shields 23.
  • a ring insert 25 extending concentrically with the axis of rotation is formed on the first housing part 2, on the inside of which a pair of annular copper bands 26, 27 are attached.
  • the copper strips 26, 27 are electrically connected to the two terminals of the BNC terminal 8 in the terminal box 5 of the first housing part 2.
  • a second concentrically extending annular insert 31 is formed on the second housing part 3, on the outside of a further pair of annular copper bands 28, 29 is arranged.
  • the copper strips 28, 29 are electrically connected to the two terminals of the BNC terminal 8 in the terminal box 5 of the second housing part 3.
  • the ring inserts 25, 31 are arranged concentrically with each other and thus allow unrestricted rotational movement of the rotary connector.
  • the copper strips 26, 27, 28, 29 are radially aligned, that is, the normal of the surface points in the radial direction with respect to the axis of rotation.
  • the copper strips 26 and 28 are arranged opposite one another at the same axial position and thus form a capacitive coupling element in the form of a capacitor.
  • the copper bands page 8 are radially aligned, that is, the normal of the surface points in the radial direction with respect to the axis of rotation.
  • the copper strips 26 and 28 are arranged opposite one another at the same axial position and thus form a capacitive coupling element in the form of a capacitor.
  • the ring width of the inserted copper strips 26, 27, 28, 29 is 2 cm, the copper strips 26, 27, 28, 29 of each capacitive coupling element are spaced 1 cm.
  • FIG. 3 shows a further embodiment of a rotary transformer according to the invention. Shown is a sectional view of a side of the rotary transformer. The axis of rotation 31 is indicated by a dashed 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 embedded in a first housing part 2.
  • the primary winding 32 is wound.
  • an annular support 35 with the secondary winding 34 a engages an annular support 35 with the secondary winding 34 a.
  • the primary winding 32 is thus arranged radially within the secondary winding 35.
  • the annular support 35 is fixed to the second housing part 3.
  • a lid 36 made of ferromagnetic material is incorporated, which closes the trough 33 in an annular manner.
  • the interior of the trough 33 receiving the primary winding 32 and the secondary winding 34 is magnetically sealed against the outside.
  • First housing part 2 and second housing part 3 are rotatably mounted about the axis of rotation 31 against each other. Between the housing parts, a gap 37 is formed, which has an axially extending, rotationally symmetrical region 38 and terminates in a labyrinth seal 30.
  • Copper bands 28, 29 are mounted on an electrically non-conductive substrate and electrically isolated from each other and against 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.
  • First capacitive coupling element and second capacitive coupling element together form a transmission channel for data transmission.
  • the copper strips 26, 27, 28, 29 of the rotary transformer are designed such that the smallest possible eddy currents are induced by the inductive coupling element.
  • FIG. 4a shows a first example of such a development.
  • transverse strips 42 made of copper are arranged to form a copper strip 40 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 strip.
  • the ends 44 are assembled to a gap, so that no circular currents can flow along the longitudinal strip 41.
  • FIG. 4b shows a second example of a development of the copper strips 26, 27, 28, 29. Page 10
  • a copper strip 30 In a copper strip 30 side incisions 45 are laterally introduced in the longitudinal direction, so that there is a total of a meandering extending conductor.
  • the copper strip 40 is assembled at the ends 44 to form an annular copper strip.
  • the ends 44 are assembled to a gap so that no circulating currents can flow along the copper strip 40.
  • Figure 5 shows the block diagram of a non-contact power and data transmission via a freely rotatable coupling.
  • a trained as a transducer head rotary transformer 61 comprises a primary side 56 and a secondary side 57 of a transformer, which are arranged rotatable against each other.
  • the transformer forms the inductive coupling element for non-contact 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 are foreseeable.
  • This alternating current is passed through the transformer to a rectifier 55.
  • a rectifier 55 To increase the coupling strength of the rectifier comprises a resonant circuit whose resonance frequency is tuned to the frequency of the injected alternating current.
  • the rectifier 55 supplies a load 60, for example a converter or a motor or an electronic circuit.
  • the generator 54 also provides a modem 50 and a transceiver 52.
  • the modem 50 receives data via a line, not shown, and passes these as signals to the transceiver 52.
  • the transceiver 52 amplifies the signals. Page 11
  • 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 so that the two plates are mutually movable.
  • signals from the transceiver 53 can be transmitted to the transceiver 53 and vice versa.
  • a return via a ground line is not necessary.
  • the susceptibility is reduced.
  • the transceiver 53 is fed from the alternating current transmitted via the inductive coupling element, in particular from the rectifier 55. From the transceiver 53, the signals reach the modem 51, which is also supplied by the rectifier 55.
  • the modem 51 may send data to the transceiver 53 received in the modem 50.
  • a bidirectional data exchange via a movable coupling device wherein parallel to the coupling for the data exchange, an inductive coupling is provided for energy from which a consumer and the transceivers 52, 53 and / or the modems 50, 51 are supplied.

Landscapes

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

Abstract

La présente invention concerne un dispositif de transmission rotatif dans lequel des éléments de couplage inductifs destinés à la transmission d'énergie sans contact et des éléments de couplage capacitifs destinés à la transmission de données sans contact, sont formés concentriquement avec l'axe de rotation du dispositif de transmission rotatif, un écran magnétique étant formé entre les éléments de couplage inductifs et les éléments de couplage capacitifs.
PCT/EP2008/007079 2007-09-10 2008-08-29 Dispositif de couplage Ceased WO2009033573A1 (fr)

Priority Applications (1)

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

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007042659.5 2007-09-10
DE102007042659.5A DE102007042659C5 (de) 2007-09-10 2007-09-10 Koppeleinrichtung

Publications (1)

Publication Number Publication Date
WO2009033573A1 true WO2009033573A1 (fr) 2009-03-19

Family

ID=39925021

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/007079 Ceased WO2009033573A1 (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)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010001484A1 (de) 2010-02-02 2011-09-29 Balluff Gmbh Übertragungsvorrichtung zur kontaktlosen Übertragung von Energie und Daten, Übertragungssystem und Verfahren zur kontaktlosen induktiven Energieübertragung und Datenübertragung
WO2012041554A1 (fr) * 2010-09-28 2012-04-05 Schleifring Und Apparatebau Gmbh Articulation rotoïde sans contact
WO2014012943A1 (fr) * 2012-07-17 2014-01-23 Stichting Nationaal Lucht- En Ruimtevaart Laboratorium Transfert de puissance et de données sans contact
EP2933655A1 (fr) * 2014-04-14 2015-10-21 Sick Ag Capteur optoélectronique et procédé destiné à la détection d'objets dans une zone de surveillance
WO2015177759A1 (fr) 2014-05-23 2015-11-26 I.M.A. Industria Macchine Automatiche S.P.A. Unité de travail équipée d'un dispositif permettant un transfert d'électricité sans contact et procédé permettant un transfert d'électricité sans contact dans une unité de travail
EP3070723A3 (fr) * 2015-03-16 2016-11-02 Sick Ag Dispositif de transmission de donnees et d'energie entre deux objets se deplaçant l'un par rapport a l'autre
EP2901187B1 (fr) 2012-09-25 2020-04-22 BAE Systems PLC Installation de joint tournant optique

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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
DE102021201679A1 (de) * 2021-02-23 2022-08-25 Dr. Johannes Heidenhain Gmbh Winkelmesssystem
IL294352B1 (en) * 2022-06-27 2025-10-01 Irp Nexus Group Ltd Method for controlling power transfer in a rotating transformer

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DE4125143A1 (de) * 1991-07-30 1993-02-04 Schwan Ulrich Einrichtung zur kontaktlosen uebertragung von wechselsignalen
US6075433A (en) * 1995-05-29 2000-06-13 Matsushita Electric Industrial Co., Ltd. Power supply unit
DE102005020186A1 (de) * 2005-04-28 2006-11-09 General Electric Co. Kontaktloses Mehrkanal-Leistungsübertragungssystem für ein Computertomographie-System

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010001484A1 (de) 2010-02-02 2011-09-29 Balluff Gmbh Übertragungsvorrichtung zur kontaktlosen Übertragung von Energie und Daten, Übertragungssystem und Verfahren zur kontaktlosen induktiven Energieübertragung und Datenübertragung
EP2621341B1 (fr) 2010-09-28 2017-04-26 Schleifring und Apparatebau GmbH Joint rotatif sans contact
WO2012041554A1 (fr) * 2010-09-28 2012-04-05 Schleifring Und Apparatebau Gmbh Articulation rotoïde sans contact
CN103260517A (zh) * 2010-09-28 2013-08-21 滑动环及设备制造有限公司 非接触式旋转接头
EP2954844B1 (fr) 2010-09-28 2020-08-26 Schleifring GmbH Joint rotatif sans contact
US9748802B2 (en) 2010-09-28 2017-08-29 Schleifring Und Apparatebau Gmbh Contactless rotary joint
EP2954844A1 (fr) * 2010-09-28 2015-12-16 Schleifring und Apparatebau GmbH Joint rotatif sans contact
CN103260517B (zh) * 2010-09-28 2016-04-20 滑动环及设备制造有限公司 非接触式旋转接头
US9362047B2 (en) 2010-09-28 2016-06-07 Schleifring Und Apparatebau Gmbh Contactless rotary joint
US9812255B2 (en) 2012-07-17 2017-11-07 Stichting Nationaal Lucht-En Ruimtevaart Laboratorium Contactless power and data transfer
WO2014012943A1 (fr) * 2012-07-17 2014-01-23 Stichting Nationaal Lucht- En Ruimtevaart Laboratorium Transfert de puissance et de données sans contact
EP2901187B1 (fr) 2012-09-25 2020-04-22 BAE Systems PLC Installation de joint tournant optique
EP2933655A1 (fr) * 2014-04-14 2015-10-21 Sick Ag Capteur optoélectronique et procédé destiné à la détection d'objets dans une zone de surveillance
WO2015177759A1 (fr) 2014-05-23 2015-11-26 I.M.A. Industria Macchine Automatiche S.P.A. Unité de travail équipée d'un dispositif permettant un transfert d'électricité sans contact et procédé permettant un transfert d'électricité sans contact dans une unité de travail
EP3070723A3 (fr) * 2015-03-16 2016-11-02 Sick Ag Dispositif de transmission de donnees et d'energie entre deux objets se deplaçant l'un par rapport a l'autre
US10263468B2 (en) 2015-03-16 2019-04-16 Sick Ag Apparatus for transmitting data and energy between two objects moving relative to one another

Also Published As

Publication number Publication date
DE102007042659C5 (de) 2016-01-21
DE102007042659B4 (de) 2012-09-13
EP2201584A1 (fr) 2010-06-30
DE102007042659A1 (de) 2009-03-26
EP2201584B1 (fr) 2017-07-26
EP2201584B2 (fr) 2020-07-22

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