EP1284004B1 - Inductive translator composed of two spools with respective cores - Google Patents

Inductive translator composed of two spools with respective cores Download PDF

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Publication number
EP1284004B1
EP1284004B1 EP01921224A EP01921224A EP1284004B1 EP 1284004 B1 EP1284004 B1 EP 1284004B1 EP 01921224 A EP01921224 A EP 01921224A EP 01921224 A EP01921224 A EP 01921224A EP 1284004 B1 EP1284004 B1 EP 1284004B1
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EP
European Patent Office
Prior art keywords
core
transmitter according
cores
inductive transmitter
sensor
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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.)
Expired - Lifetime
Application number
EP01921224A
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German (de)
French (fr)
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EP1284004A1 (en
Inventor
Juergen Schirmer
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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    • 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

Definitions

  • the invention relates to an inductive transformer consisting of two coils each with a core.
  • Such inductive transformers are used for the transmission of Data and / or energy between two are relative to each other used moving parts; z. B. in the form of Drehübertragern for transmitting data and / or energy in turning Parts (eg steering wheels in motor vehicles) or in the form of Linearübertragern with linearly moving parts.
  • the transformers consist of two coils, each with a core, the both cores are movable relative to each other.
  • the data and / or Energy transfer by means of induction (transformer principle).
  • an inductive transformer which consists of two coils one core each.
  • the two cores are movable relative to each other.
  • Of the Transformer is additionally equipped with an oscillating circuit, which with a the two coils is connected. With this circuit switches are controlled. This Switches are switched on or off by several magnets.
  • the oscillating Circuit is used to shut off the coil when a threshold frequency is reached.
  • a threshold frequency is reached.
  • the inventive inductive transformer with the features of Claim 1 has the advantage that the transformer very small and compact builds. Because two separate systems with different functions integrated in a single inductive transformer system are, reduces the number of items. this leads to a cost saving with the same functionality.
  • FIG. 1 shows a first embodiment of the invention shown.
  • the inductive Transformer designed as a rotary transformer. It consists of two Coils 1, 2 each having an annular core 3, 4, one of which - In the embodiment of the core 3 - rotatable about an axis Z. is stored.
  • the two cores 3, 4 can be L-shaped in cross section be educated.
  • the core 4 facing leg of the L of core 3 is with a contour 5, here a slope, Provided.
  • the slope opposite is at the core 4 a Magnetic field-sensitive sensor 6 is arranged as the Hall sensor, magnetoresistive sensor o. The like. Be formed can.
  • Figures 2 and 3 show a further embodiment, in which of the inductive transformer as a linear transformer is trained.
  • a linear transformer z. B. with removable seats in motor vehicle signals from controls and Side airbags or power for seat heating or servomotors
  • the position of the seats can be transferred automatic seat adjustment can be measured.
  • the linear transformer according to Figures 2 and 3 operates on the Same principle as the rotary transformer of Figure 1.
  • the coil 2 is with its core 3 in the direction of the arrows X in Figure 2 movable.
  • the core 4 is at its the core 3 facing side provided with a contour 5, as in the Embodiment of Figure 1 is designed as a slope.
  • the slope is at least one free leg of the U educated.
  • Core 3 at least one free leg of the U a sensor. 6 arranged. If both free legs of the U of core 4 with a contour 5 are provided, it is also possible to both free legs of the U of core 3 to attach a sensor 6.
  • the air gap 7 between the two cores 3 changes and 4. This causes a change in the magnetic flux, the can be measured by the sensor 6.
  • the measured magnetic River is in direct proportion to the position of the two Cores 3 and 4 to each other.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Near-Field Transmission Systems (AREA)

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen induktiven Übertrager bestehend aus zwei Spulen mit je einem Kern.The invention relates to an inductive transformer consisting of two coils each with a core.

Solche induktiven Übertrager werden für die Übertragung von Daten und/oder Energie zwischen zwei sich relativ zueinander bewegenden Teilen verwendet; z. B. in Form von Drehübertragern zur Übertragung von Daten und/oder Energie in sich drehenden Teilen (z. B. Lenkrädern in Kfz) oder in Form von Linearübertragern bei linear zueinander bewegten Teilen. Die Übertrager bestehen dabei aus zwei Spulen mit je einem Kern, wobei die beiden Kerne relativ zueinander bewegbar sind. Die Datenund/oder Energieübertragung erfolgt mittels Induktion (Trafo-Prinzip).Such inductive transformers are used for the transmission of Data and / or energy between two are relative to each other used moving parts; z. B. in the form of Drehübertragern for transmitting data and / or energy in turning Parts (eg steering wheels in motor vehicles) or in the form of Linearübertragern with linearly moving parts. The transformers consist of two coils, each with a core, the both cores are movable relative to each other. The data and / or Energy transfer by means of induction (transformer principle).

In der EP-A-0357829 wird ein induktiver Übertrager offenbart, der aus zwei Spulen mit je einem Kern besteht. Die beiden Kerne sind relativ zueinander bewegbar. Der Übertrager ist zusätzlich ausgestattet mit einer oszillierenden Schaltung, welche mit einer der beiden Spulen verbunden ist. Mit dieser Schaltung werden Schalter angesteuert. Diese Schalter werden von mehreren Magneten ein- oder abgeschaltet. Die oszillierende Schaltung dient zur Abschaltung der Spule, wenn eine Grenzwertfrequenz erreicht wird. Hier ist ein erstes System vorhanden, mit dem die Übertragung der Daten oder der Energie bestimmt wird. Bei einem zweiten, völlig unabhängig vom anderen System arbeitenden Verfahren bzw. System wird die Position bestimmt.In EP-A-0357829 an inductive transformer is disclosed which consists of two coils one core each. The two cores are movable relative to each other. Of the Transformer is additionally equipped with an oscillating circuit, which with a the two coils is connected. With this circuit switches are controlled. This Switches are switched on or off by several magnets. The oscillating Circuit is used to shut off the coil when a threshold frequency is reached. Here is a first system exists, with which the transmission of the data or the Energy is determined. In a second, completely independent of the other system working method or system, the position is determined.

Auch im Patent Abstract of Japan, Vol. 2000, No. 05, 14. September 2000 und JP 2000-046512 A (Furukawa Electric Co. Ltd: Thi), 18. Februar 2000, Abstract ist ein eigenes Positionsmesssystem vorhanden. Der Winkel bzw. die Position wird auch hier unabhängig von der Übertragung zwischen zwei Spulen erfasst. Dies bedeutet, dass zwei unabhängig voneinander arbeitende Systeme vorhanden sind.Also in Patent Abstract of Japan, Vol. 05, September 14, 2000 and JP 2000-046512 A (Furukawa Electric Co. Ltd.: Thi), February 18, 2000, abstract is a separate Position measuring system available. The angle or the position is also here regardless of the transmission between two coils detected. This means two independently operating systems are present.

Weiterhin ist es bekannt, die relative Position zweier relativ zueinander bewegbarer Teile mit Hilfe magnetischer Meßmethoden zu ermitteln. Furthermore, it is known, the relative position of two relatively mutually movable parts using magnetic measuring methods to determine.

Sollen sowohl eine Übertragung von Daten und/oder Energie als auch eine Bestimmung der Positon der beiden Teile zueinander erfolgen, wurden bisher zwei getrennte Systeme verwendet, von denen das eine zur Übertragung der Daten und/oder der Energie und das andere zur Bestimmung der relativen Position diente. Dies führte zu einem erhöhten Platzbedarf, zu einer Vielzahl von Bauteilen und zu hohen Kosten.Should be both a transmission of data and / or energy as also a determination of the position of the two parts to each other two separate systems have been used so far, from the one for the transmission of data and / or energy and the other was for determining the relative position. This led to an increased space requirement, to a multiplicity of Components and at high cost.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße induktive Übertrager mit den Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß der Übertrager sehr klein und kompakt baut. Da zwei getrennte Systeme mit unterschiedlichen Funktionen in einem einzigen induktiven übertrager System integriert sind, reduziert sich die Zahl der Einzelteile. Dies führt zu einer Kostenersparnis bei gleicher Funktionalität.The inventive inductive transformer with the features of Claim 1 has the advantage that the transformer very small and compact builds. Because two separate systems with different functions integrated in a single inductive transformer system are, reduces the number of items. this leads to a cost saving with the same functionality.

Durch die in den Unteransprüchen aufgeführten Merkmale sind vorteilhafte Weiterbildungen des im Anspruch 1 angegebenen induktiven Übertragers möglich.By the features listed in the subclaims are advantageous developments of specified in claim 1 inductive transformer possible.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigt:

  • Figur 1 einen Schnitt durch einen induktiven Übertrager in Form eines Drehübertragers,
  • Figur 2 einen induktiven Übertrager in Form eines Linearübertragers, und
  • Figur 3 einen Schnitt in Richtung A-A nach Figur 2.
    • Two embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. It shows:
  • 1 shows a section through an inductive transformer in the form of a rotary transformer,
  • Figure 2 shows an inductive transformer in the form of a linear transformer, and
  • 3 shows a section in the direction AA of Figure 2.

    • Beschreibung der AusführungsbeispieleDescription of the embodiments

    In Figur 1 ist eine erste Ausführungsform der Erfindung dargestellt. Bei dieser Ausführungsform ist der induktive Übertrager als Drehübertrager ausgebildet. Er besteht aus zwei Spulen 1, 2 mit je einem ringförmigen Kern 3, 4, von denen einer - im Ausführungsbeispiel der Kern 3 - um eine Achse Z drehbar gelagert ist. Die beiden Kerne 3, 4 können im Querschnitt L-förmig ausgebildet sein. Der dem Kern 4 zugewandte Schenkel des L von Kern 3 ist mit einer Kontur 5, hier einer Schräge, versehen. Der Schräge gegenüberliegend ist am Kern 4 ein magnetfeld-empfindlicher Sensor 6 angeordnet, der als Hallsensor, magnetoresistiver Sensor o. dgl. ausgebildet sein kann.FIG. 1 shows a first embodiment of the invention shown. In this embodiment, the inductive Transformer designed as a rotary transformer. It consists of two Coils 1, 2 each having an annular core 3, 4, one of which - In the embodiment of the core 3 - rotatable about an axis Z. is stored. The two cores 3, 4 can be L-shaped in cross section be educated. The core 4 facing leg of the L of core 3 is with a contour 5, here a slope, Provided. The slope opposite is at the core 4 a Magnetic field-sensitive sensor 6 is arranged as the Hall sensor, magnetoresistive sensor o. The like. Be formed can.

    Infolge der als Schräge ausgebildeten Kontur 5 ändert sich bei einer Drehung des Kerns 3 um die Achse Z der Luftspalt 7 zwischen den beiden Kernen 3 und 4. Diese Änderung des Luftspaltes 7 bewirkt eine Änderung des magnetischen Flusses, der mit dem magnetfeld-empfindlichen Sensor 6 gemessen werden kann. Der gemessene magnetische Fluß steht dabei in direktem Verhältnis zum Drehwinkel zwischen den beiden Kernen 3 und 4.As a result of the formed as a slope contour 5 changes at a rotation of the core 3 about the axis Z of the air gap 7 between the two cores 3 and 4. This change of the air gap 7 causes a change in the magnetic flux associated with the Magnetic field-sensitive sensor 6 can be measured. Of the measured magnetic flux is in direct proportion to the angle of rotation between the two cores 3 and 4.

    Mit Hilfe dieser Ausgestaltung ist es möglich, nicht nur Daten und/oder Energie zu übertragen, sondern auch die relative Position der beiden Kerne 3 und 4 zueinander zu ermitteln.With the help of this embodiment, it is possible, not just data and / or energy, but also the relative Position of the two cores 3 and 4 to each other to determine.

    Die Figuren 2 und 3 zeigen eine weitere Ausführungsform, bei welcher der induktive Übertrager als Linearübertrager ausgebildet ist. Mit einem solchen Linearübertrager können z. B. bei ausbaubaren Sitzen in Kfz Signale von Bedienelementen und Seitenairbags oder Energie für Sitzheizung oder Stellmotoren übertragen werden und zusätzlich kann die Position der Sitze bei automatischer Sitzverstellung gemessen werden.Figures 2 and 3 show a further embodiment, in which of the inductive transformer as a linear transformer is trained. With such a linear transformer z. B. with removable seats in motor vehicle signals from controls and Side airbags or power for seat heating or servomotors In addition, the position of the seats can be transferred automatic seat adjustment can be measured.

    Der Linearübertrager nach den Figuren 2 und 3 arbeitet nach dem gleichen Prinzip wie der Drehübertrager nach Figur 1. Es sind ebenfalls zwei Spulen 1, 2 mit je einem Kern 3, 4 vorgesehen, wobei die beiden Kerne 3, 4 im Querschnitt U-förmig ausgebildet sein können. Sie können jedoch auch L-förmig ausgebildet werden. Die Spule 2 ist mit ihrem Kern 3 in Richtung der Pfeile X in Figur 2 bewegbar. Der Kern 4 ist an seiner dem Kern 3 zugewandten Seite mit einer Kontur 5 versehen, die wie beim Ausführungsbeispiel nach Figur 1 als Schräge ausgebildet ist. Die Schräge ist dabei an mindestens einem freien Schenkel des U ausgebildet. Auf der der Schräge gegenüberliegenden Seite ist am Kern 3 an zumindest einem freien Schenkel des U ein Sensor 6 angeordnet. Sofern beide freien Schenkel des U von Kern 4 mit einer Kontur 5 versehen sind, ist es auch möglich, an beiden freien Schenkeln des U von Kern 3 einen Sensor 6 anzubringen.The linear transformer according to Figures 2 and 3 operates on the Same principle as the rotary transformer of Figure 1. There are also two coils 1, 2 each provided with a core 3, 4, wherein the two cores 3, 4 in cross-section U-shaped could be. However, they can also be L-shaped. The coil 2 is with its core 3 in the direction of the arrows X in Figure 2 movable. The core 4 is at its the core 3 facing side provided with a contour 5, as in the Embodiment of Figure 1 is designed as a slope. The slope is at least one free leg of the U educated. On the opposite side of the slope is on Core 3 at least one free leg of the U a sensor. 6 arranged. If both free legs of the U of core 4 with a contour 5 are provided, it is also possible to both free legs of the U of core 3 to attach a sensor 6.

    Durch eine Bewegung des Kerns 3 in Richtung der Pfeile X in Figur 2 ändert sich der Luftspalt 7 zwischen den beiden Kernen 3 und 4. Dadurch kommt es zu einer Änderung des Magnetflusses, der von dem Sensor 6 gemessen werden kann. Der gemessene magnetische Fluß steht dabei in direktem Verhältnis zur Position der beiden Kernen 3 und 4 zueinander.By a movement of the core 3 in the direction of the arrows X in 2, the air gap 7 between the two cores 3 changes and 4. This causes a change in the magnetic flux, the can be measured by the sensor 6. The measured magnetic River is in direct proportion to the position of the two Cores 3 and 4 to each other.

    In beiden Ausführungsbeispielen ist nur die Spule 1 im Kern 4 stromdurchflossen, während die Spule 2 im Kern 3 nicht stromdurchflossen ist und nur zur Induktion mit der Spule 1 im Kern 3 dient.In both embodiments, only the coil 1 in the core 4th current flows through, while the coil 2 in the core 3 is not current is flowing through and only for induction with the coil 1 in Core 3 is used.

    Die vorhergehende Beschreibung der Ausführungsbeispiele gemäß der vorliegenden Erfindung dient nur zu illustrativen Zwecken und nicht zum Zwecke der Beschränkung der Erfindung. Im Rahmen der Erfindung sind verschiedene Änderungen und Modifikationen möglich, ohne den Umfang der Erfindung sowie ihre Äquivalente zu verlassen.The preceding description of the embodiments in accordance with the present invention is illustrative only And not for the purpose of limiting the invention. In the context of the invention are various changes and Modifications possible without departing from the scope of the invention to leave their equivalents.

    Claims (13)

    1. Inductive transmitter comprising two coils (1, 2) each having one core (3, 4), it being possible for the two cores (3, 4) to move relative to one another, the transmitter making it possible to simultaneously transmit data and/or power and determine the position of the two cores in relation to one another, and the data and/or power being transmitted by means of induction produced between the coil (1, 2) and the core (3, 4), and the position of the two cores (3, 4) in relation to one another being determined by measuring the magnetic field prevailing between the two coils (1, 2) with the aid of a sensor (6) which is sensitive to magnetic fields.
    2. Inductive transmitter according to Claim 1, characterized in that at least one core (3, 4) is provided with a contour (5) which brings about a change in the magnetic flux in the sensor (6) which is sensitive to magnetic fields.
    3. Inductive transmitter according to Claim 2, characterized in that the contour (5) of one core (3, 4) faces the other core (3, 4).
    4. Inductive transmitter according to Claim 2 or 3, the contour (5) being in the form of a slope.
    5. Inductive transmitter according to one of Claims 2 to 4, characterized in that the sensor (6) and the contour (5) are arranged opposite one another.
    6. Inductive transmitter according to one of Claims 1 to 5, characterized in that the sensor (6) is in the form of a Hall sensor, magnetoresistive sensor or the like.
    7. Inductive transmitter according to one of Claims 1 to 6, characterized in that the sensor (6) is arranged in the air gap (7) between the two cores (3, 4).
    8. Inductive transmitter according to one of Claims 2 to 6, characterized in that the sensor (6) is arranged on one core (3, 4) and the contour (5) is arranged on the other core (3, 4).
    9. Inductive transmitter according to one of Claims 2 to 6, characterized in that the sensor (6) and the contour (5) are arranged on the same core (3, 4).
    10. Inductive transmitter according to one of Claims 1 to 9, characterized in that the relative movement of the two cores (3, 4) in relation to one another is a rotary movement.
    11. Inductive transmitter according to one of Claims 1 to 9, characterized in that the relative movement of the two cores (3, 4) in relation to one another is a linear movement.
    12. Inductive transmitter according to one of Claims 2 to 11, characterized in that the cores (3, 4) are L-shaped in cross section and the contour (5) is formed on one limb of the L.
    13. Inductive transmitter according to one of Claims 2 to 11, characterized in that the cores (3, 4) are U-shaped in cross section and the contour (5) is formed on at least one free limb of the U.
    EP01921224A 2000-05-13 2001-03-21 Inductive translator composed of two spools with respective cores Expired - Lifetime EP1284004B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE10023592 2000-05-13
    DE10023592A DE10023592A1 (en) 2000-05-13 2000-05-13 Inductive transformer for transmission of data and/or energy e.g. for automobile steering wheel, uses measurement of magnetic field for determining relative spacing of transformer cores
    PCT/DE2001/001075 WO2001088931A1 (en) 2000-05-13 2001-03-21 Inductive translator composed of two spools with respective cores

    Publications (2)

    Publication Number Publication Date
    EP1284004A1 EP1284004A1 (en) 2003-02-19
    EP1284004B1 true EP1284004B1 (en) 2004-06-16

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01921224A Expired - Lifetime EP1284004B1 (en) 2000-05-13 2001-03-21 Inductive translator composed of two spools with respective cores

    Country Status (6)

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    US (1) US6847283B2 (en)
    EP (1) EP1284004B1 (en)
    JP (1) JP2003533920A (en)
    CN (1) CN1265405C (en)
    DE (2) DE10023592A1 (en)
    WO (1) WO2001088931A1 (en)

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    DE10023592A1 (en) * 2000-05-13 2001-11-29 Bosch Gmbh Robert Inductive transformer for transmission of data and/or energy e.g. for automobile steering wheel, uses measurement of magnetic field for determining relative spacing of transformer cores
    EP1617228B1 (en) * 2004-07-16 2008-10-22 Liaisons Electroniques-Mecaniques Lem S.A. Current sensor
    US7639095B2 (en) * 2005-09-28 2009-12-29 Tyco Electronics Belgium Ec N.V. Circuit and method for contact-less transmission
    CN101373660A (en) * 2007-07-14 2009-02-25 刘刚 Electric energy coupler
    EP2954844B1 (en) 2010-09-28 2020-08-26 Schleifring GmbH Contactless rotary joint
    DE202011107803U1 (en) 2011-11-14 2011-12-19 Igus Gmbh Inductive rotary transformer
    DE102013206826C5 (en) 2013-04-16 2018-03-29 Siemens Healthcare Gmbh Device for contactless data and power transmission in a computed tomography system
    DE102014219032A1 (en) * 2014-09-22 2015-12-17 Siemens Aktiengesellschaft Vehicle and device for use in a vehicle
    CN105679521B (en) * 2016-01-22 2018-01-02 南京航空航天大学 Axial half section LL types non-contact power slip ring

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    Also Published As

    Publication number Publication date
    US20030117250A1 (en) 2003-06-26
    CN1429393A (en) 2003-07-09
    CN1265405C (en) 2006-07-19
    DE50102606D1 (en) 2004-07-22
    WO2001088931A1 (en) 2001-11-22
    DE10023592A1 (en) 2001-11-29
    US6847283B2 (en) 2005-01-25
    JP2003533920A (en) 2003-11-11
    EP1284004A1 (en) 2003-02-19

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