EP0388792B1 - Transmission device - Google Patents

Transmission device Download PDF

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Publication number
EP0388792B1
EP0388792B1 EP90104899A EP90104899A EP0388792B1 EP 0388792 B1 EP0388792 B1 EP 0388792B1 EP 90104899 A EP90104899 A EP 90104899A EP 90104899 A EP90104899 A EP 90104899A EP 0388792 B1 EP0388792 B1 EP 0388792B1
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EP
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Prior art keywords
rotor
stator
annular coils
pair
transmitting
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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.)
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EP90104899A
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German (de)
French (fr)
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EP0388792A1 (en
Inventor
Wilhelm T. Dipl.-Ing. Jahn
Werner Röschlau
Michael Dr.Med.Dr.Rer.Nat. Scherz
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Scherz Michael Drmed Drrernat
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Scherz Michael Drmed Drrernat
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/04—Arrangements for transmitting signals characterised by the use of a wireless electrical link using magnetically coupled devices

Definitions

  • the invention relates to a device for transmitting signals, which can be broken down into at least one AC voltage component, between a rotor and a stator from a transmitter unit to a receiver unit with the aid of pairs of toroidal coils, the coil turns of which form parts of the transmitter or receiver unit and which, with inductive coupling, coaxial with the axis of rotation of the Rotors are arranged.
  • a particular difficulty in signal transmission generally arises when one or more measuring devices rotate with the rotor, the time-varying measurement or output values of which are to be transmitted to a fixed receiving unit.
  • DE-A-28 46 583 describes a device for transmitting measurement signals via a transformer from a rotor to a stator side and for transmitting a supply voltage via the same transformer from the stator to the rotor side.
  • a power oscillator with a low output impedance is provided on the stator side to generate the supply voltage, which has a substantially higher frequency than the frequency-modulated measurement signals, the oscillator being coupled to the transformer via a capacitor, and in which between the capacitor and the transmission coil, the measurement signals are decoupled at a point which is high-impedance under the transmission conditions, a rectifier arrangement for the supply voltage and a signal generator for the measurement signals being arranged on the rotor side and the measurement signals being able to be coupled in at one point between the rectifier and the transmission coil.
  • the prior art also includes an arrangement for temperature measurement on rotating shafts from DE-A-958 600.
  • Two inductive transmitters are provided in connection with a bridge circuit, in one branch of which a resistance thermometer is switched on.
  • the bridge receives its supply voltage via the ring coil system of one transmitter, while the other ring coil system of another transmitter passes the measured value on to the display instrument.
  • the invention is based on the task of designing a device of the type described in the introduction in such a way that a contactless transmission of measured values and energy in connection with a speed-dependent evaluation or further processing can be achieved between a rotor and a stator.
  • the signal transmission should also be made possible with rotors rotating at high speed, for example above 5000 rpm.
  • the transmitting or receiving unit arranged on the rotor or on the stator can be designed in various ways. In general, rotor or stator boards equipped with electronic components are used.
  • a preamplifier on the rotor board directly at the point of origin of the signals, for example in the immediate vicinity of a measuring device, and to transmit the already amplified signals to transmit the transmitting unit to the fixed receiving unit.
  • the transmission of signals can take place both from the rotor to the stator and vice versa. It is also possible to transmit signals between parts located in the direction of rotation relative to one another via at least one pair of toroidal coils. The transmission can also be carried out intermittently in both directions.
  • An expedient embodiment of the elementary device described above can consist in that the ring coils lie in the recesses of a partial core, the distance between the two partial cores forming an air gap.
  • the Partial cores can advantageously be designed as circular disc cores that are open on one side towards the gap.
  • a wide variety of coil core materials, for example ferrites, known in transformer technology can be used as the material for the partial cores, the choice of material essentially depending on the frequency ranges to be transmitted.
  • electrical signals for example measured values taken from the rotor, can be transmitted without problems with appropriate preamplification from 4 ⁇ V.
  • the electrical signals to be transmitted can advantageously be transmitted as coding or as modulation of a carrier frequency.
  • measured values can be coded as a digital signal serially with a carrier frequency of approx. 200 kHz and inductively transmitted with an 8 bit data code with start and stop bit and a parity check bit from the rotor board to the stator board via the coupled ring coils.
  • Frequency identification takes place in the stator board and, if appropriate, the signals can advantageously be converted into a standardized computer-readable interface coding.
  • a shielding ring made of electrically conductive material, preferably of highly conductive metallic materials, for example of copper or aluminum, is arranged between two adjacent ring coils on the rotor or stator. This will result in unwanted signal transmission avoided between the individual transmission paths.
  • an adjustment potentiometer or the like such a shielding ring can advantageously be used to fine-tune the frequency of the transmitter or receiver unit by changing the damping (center frequency adjustment of the carrier).
  • the features of the invention provide a device for the transmission of electrical signals or voltages, which enables the measurement values specified on the rotor to be displayed or evaluated in conjunction with the rotor speed even at high speeds and rapid signal changes.
  • the rotor contains a circular disc-shaped partial core 1, which is provided with a rotary bearing 2 and is driven by drive elements, not shown in the drawing.
  • a further circular disk-shaped fixed partial core 3 is arranged coaxially with the rotatable circular disk-shaped partial core 1.
  • the two partial cores 1 and 3 consist of ferrite.
  • a free air gap 4 (a vacuum gap or a liquid gap would also be possible!) Of approximately 1 mm.
  • annular groove recesses 5, 7, 9 and 11, and 6, 8, 10 and 12 in which inductively coupled coaxial toroidal coils 13, 15, 17 and 19 and 14, 16, 18 and 20 are located.
  • the ring coils of the rotor 13, 15, 17 and 19 are, as indicated, connected to a rotor board 21 containing electronic switching or measuring elements.
  • the ring coils of the stator 14, 16, 18 and 20 are connected to corresponding stationary components 22, 23, 24, 25 for signal display or signal processing. It can be any arrangement for digital or analog signal processing and display, which are optionally at least partially combined in a stator board.
  • shielding rings 26, 27, 28 and 29, 30, 31 are embedded in the material of the partial cores 1.3, which act as short-circuit rings serve and prevent unwanted crosstalk between the individual systems.
  • FIG. 3 shows a functional diagram of a measuring device.
  • the innermost ring coil pair 13, 14 is used for voltage transmission from an alternating voltage source 32 of the stator to a rectifier unit 33 of the rotor, which supplies the operating voltage for a rotor board 21.
  • Another pair of toroidal coils 15, 16 is provided for transmitting an auxiliary voltage from an AC voltage source 34 to a rectifier unit 35.
  • This auxiliary voltage can be switched on using a switch 36.
  • the pair of toroidal coils 17, 18 is used to transmit the quantities to be measured on the rotor in a measuring device.
  • the measuring voltage U M originating from any measuring device is amplified in the rotor board 21 by an amplifier circuit and digitized in the A / D converter 37.
  • the digital signals, optionally modulated onto a carrier frequency, are transmitted to the receiver board 38 via the pair of ring coils 17, 18.
  • an additional pair of ring coils 19, 20 is provided for the transmission of switching commands.
  • a pushbutton 39 sends a switching pulse via a pulse device 40 to a switching device 41 on the rotor side, which, for example, gradually changes the degree of amplification of the measuring amplifier on the rotor board 21.
  • the signals transmitted by the rotor board 21 are forwarded from the stator board 38 to a computer 42 for direct computer processing.
  • a sensor element 43 which is actuated, for example, by a rotor-side permanent magnet, is provided, which inputs signals corresponding to the speed into a display unit 44.
  • the display unit 44 is connected to the stator board 38 and, via a connected plotter 45, enables a graphic representation of the course of the measuring voltage U M as a function of the rotor speed.
  • the device from the exemplary embodiment specified above was specially developed for carrying out an analysis method according to DE-A-29 43 942.

Abstract

A device for the transmission of signals which can be split up into at least one AC component between a rotor and a stator from a transmitting unit to a receiving unit with the aid of pairs of toroidal coils whose coil windings form parts of the transmitting or receiving unit and which are disposed with inductive coupling coaxially with the rotation axis of the rotor is to be developed with a view to generating rpm-related measured values. This is achieved according to the invention by providing at least one pair of toroidal coils (13, 14; 15, 16) for the voltage supply of components on the rotor, at least one further pair of toroidal coils (17, 18) for transmission from the rotor to the stator of the parameters to be measured with a measuring device on the rotor, a sensor element (43) to measure the rpm of the rotor and a switching unit (44) with the aid of which measured values relating to the rpm of the rotor can be further processed or displayed. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Übertragung von in wenigstens eine Wechselspannungskomponente zerlegbaren Signalen zwischen einem Rotor und einem Stator von einer Sendeeinheit auf einer Empfangseinheit mit Hilfe von Ringspulenpaaren, deren Spulenwindungen Teile der Sende- bzw. Empfangseinheit bilden und die unter induktiver Kopplung koaxial zur Drehachse des Rotors angeordnet sind.The invention relates to a device for transmitting signals, which can be broken down into at least one AC voltage component, between a rotor and a stator from a transmitter unit to a receiver unit with the aid of pairs of toroidal coils, the coil turns of which form parts of the transmitter or receiver unit and which, with inductive coupling, coaxial with the axis of rotation of the Rotors are arranged.

In vielen technischen Aufgabenstellungen, beispielsweise bei dem Analysenverfahren unter Verwendung einer Ultrazentrifuge nach der DE-A-29 43 942 ist es erforderlich, elektrische Signale, die als analoge oder digitale Werte vorliegen, nach entsprechender Zwischenverstärkung von einem Rotor auf einen Stator zu übertragen und dort anzuzeigen oder weiterzuverarbeiten. In Gegenrichtung wird auch in manchen Fällen die Übertragung von Steuer- oder Schaltbefehlen durch elektrische Signale vom Stator auf den Rotor verlangt.In many technical tasks, for example in the analysis method using an ultracentrifuge according to DE-A-29 43 942, it is necessary to transmit electrical signals, which are in the form of analog or digital values, from a rotor to a stator after appropriate intermediate amplification and there display or further process. In the opposite direction, the transmission of control or switching commands by electrical signals from the stator to the rotor is also required in some cases.

Bekannt ist die Verwendung von Schleifringanordnungen, die jedoch bei relativ geringen Spannungen der zu übertragenden Signale und insbesondere bei hohen Drehzahlen des Rotors auf prinzipielle Schwierigkeiten stößt. Zum Stande der Technik gehören ferner die in der Elektroakustik bekannten verschiedenen magnetischen, elektrostatischen und Lichtabtastsysteme, mit denen die auf einem bewegbaren Träger z.B. einer Bildplatte gespeicherten Signale durch Abtastung auf eine feststehende Empfangseinheit übertragen werden.It is known to use slip ring arrangements, which, however, encounters fundamental difficulties with relatively low voltages of the signals to be transmitted and in particular at high rotor speeds. To the The prior art also includes the various magnetic, electrostatic and light scanning systems known in electroacoustics, with which the signals stored on a movable carrier, for example an image plate, are transmitted by scanning to a fixed receiving unit.

Eine besondere Schwierigkeit bei der Signalübertragung liegt im allgemeinen dann vor, wenn mit dem Rotor ein oder mehrere Meßvorrichtungen rotieren, deren zeitlich veränderliche Meß- bzw. Ausgangswerte auf eine feststehende Empfangseinheit übertragen werden sollen.A particular difficulty in signal transmission generally arises when one or more measuring devices rotate with the rotor, the time-varying measurement or output values of which are to be transmitted to a fixed receiving unit.

In der DE-A-28 46 583 ist eine Vorrichtung zum Übertragen von Meßsignalen über einen Übertrager von einer Rotor- auf eine Statorseite und zum Übertragen einer Versorgungsspannung über den gleichen Übertrager von der Stator- auf die Rotorseite beschrieben. Dies erfolgt dadurch, daß auf der Statorseite zum Erzeugen der Versorgungsspannung ein Leistungsoszillator mit niedriger Ausgangsimpedanz vorgesehen ist, der eine wesentlich höhere Frequenz als die frequenzmodulierten Meßsignale aufweist, wobei der Oszillator über einen Kondensator an den Übertrager gekoppelt ist, und bei dem zwischen dem Kondensator und der Übertragungsspule die Auskopplung der Meßsignale an einem unter den Übertragungsbedingungen hochohmigen Punkt erfolgt, wobei auf der Rotorseite eine Gleichrichteranordnung für die Versorgungsspannung und ein Signalerzeuger für die Meßsignale angeordnet ist und die Meßsignale in einem Punkt zwischen dem Gleichrichter und der Übertragungsspule einkoppelbar sind. Eine solche Doppelausnutzung der als Ringspulen ausgebildeten Teilspulen des Übertragers bereitet schaltungstechnische Schwierigkeiten.DE-A-28 46 583 describes a device for transmitting measurement signals via a transformer from a rotor to a stator side and for transmitting a supply voltage via the same transformer from the stator to the rotor side. This is done in that a power oscillator with a low output impedance is provided on the stator side to generate the supply voltage, which has a substantially higher frequency than the frequency-modulated measurement signals, the oscillator being coupled to the transformer via a capacitor, and in which between the capacitor and the transmission coil, the measurement signals are decoupled at a point which is high-impedance under the transmission conditions, a rectifier arrangement for the supply voltage and a signal generator for the measurement signals being arranged on the rotor side and the measurement signals being able to be coupled in at one point between the rectifier and the transmission coil. Such a double use of the partial coils of the transformer, which are designed as ring coils, presents circuit-related difficulties.

Zum Stande der Technik gehört ferner eine Anordnung zur Temperaturmessung an umlaufenden Wellen aus der DE-A-958 600. Dabei sind zwei induktive Übertrager in Verbindung mit einer Brückenschaltung vorgesehen, in deren einen Zweig ein Widerstandsthermometer eingeschaltet ist. Die Brücke erhält ihre Speisespannung über das Ringspulensystem des einen Übertragers, während das andere Ringspulensystem eines weiteren Übertragers den Meßwert an das Anzeigeinstrument weitergibt.The prior art also includes an arrangement for temperature measurement on rotating shafts from DE-A-958 600. Two inductive transmitters are provided in connection with a bridge circuit, in one branch of which a resistance thermometer is switched on. The bridge receives its supply voltage via the ring coil system of one transmitter, while the other ring coil system of another transmitter passes the measured value on to the display instrument.

Die Erfindung geht von der Aufgabenstellung aus, eine Vorrichtung der eingangs beschriebenen Art so auszubilden, daß zwischen einem Rotor und einem Stator eine berührungslose Übertragung von Meßwerten und Energie in Verbindung mit einer drehzahlabhängigen Auswertung oder Weiterverarbeitung erreicht werden kann. Dabei soll insbesondere auch die Signalübertragung bei mit hoher Geschwindigkeit, beispielsweise oberhalb von 5000 U/min, rotierenden Rotoren ermöglicht werden.The invention is based on the task of designing a device of the type described in the introduction in such a way that a contactless transmission of measured values and energy in connection with a speed-dependent evaluation or further processing can be achieved between a rotor and a stator. In particular, the signal transmission should also be made possible with rotors rotating at high speed, for example above 5000 rpm.

Die Lösung dieser Aufgabenstellung ist durch die Kennzeichnenden Merkmale des Patentanspruches 1 erläutert.The solution to this problem is explained by the characterizing features of claim 1.

Die auf dem Rotor bzw. am Stator angeordnete Sende- bzw. Empfangseinheit kann dabei in verschiedener Weise ausgebildet sein. Im allgemeinen werden mit elektronischen Bauteilen bestückte Rotor- bzw. Statorplatinen verwendet.The transmitting or receiving unit arranged on the rotor or on the stator can be designed in various ways. In general, rotor or stator boards equipped with electronic components are used.

Lassen sich auf dem Rotor zunächst nur relativ schwache elektrische Signale geringer Spannung bzw. von geringer Energie erzeugen, so besteht die Möglichkeit, einen Vorverstärker unmittelbar am Entstehungsort der Signale, beispielsweise in unmittelbarer Nähe einer Meßvorrichtung, auf der Rotorplatine anzuordnen und die bereits verstärkten Signale über die Sendeeinheit zur feststehenden Empfangseinheit zu übertragen.If only relatively weak electrical signals of low voltage or of low energy can initially be generated on the rotor, it is possible to arrange a preamplifier on the rotor board directly at the point of origin of the signals, for example in the immediate vicinity of a measuring device, and to transmit the already amplified signals to transmit the transmitting unit to the fixed receiving unit.

Im einzelnen sind die verschiedensten Ausbildungen und Schaltungsmöglichkeiten für die Sende- und Empfangseinheit je nach der gegebenen Problemstellung möglich. Wesentlich in jedem Falle die Erzeugung eines die Spulenpaare verkettenden drehzahlunabhängigen magnetischen Flusses.In particular, a wide variety of designs and circuit options for the transmitter and receiver unit are possible depending on the problem at hand. In any case, it is essential to generate a speed-independent magnetic flux that links the coil pairs.

Die Übertragung von Signalen kann dabei sowohl vom Rotor auf den Stator, als auch umgekehrt erfolgen. Es ist ferner möglich, über mindestens ein Ringspulenpaar Signale zwischen relativ zueinander in Drehrichtung befindlichen Teilen zu übertragen. Die Übertragung kann in beiden Richtungen auch intermittierend ausgeführt werden.The transmission of signals can take place both from the rotor to the stator and vice versa. It is also possible to transmit signals between parts located in the direction of rotation relative to one another via at least one pair of toroidal coils. The transmission can also be carried out intermittently in both directions.

In weiterer Ausbildung der Erfindung kann es zweckmäßig sein, mindestens ein weiteres Ringspulenpaar zur Übertragung von Schalt- bzw. Steuersignalen vorzusehen, welche bei auf dem Rotor angeordneten Bauteilen Schaltvorgänge auslösen.In a further embodiment of the invention, it can be expedient to provide at least one further pair of toroidal coils for transmitting switching or control signals, which trigger switching processes in the case of components arranged on the rotor.

Eine zweckmäßige Ausführungsform der oben beschriebenen elementaren Vorrichtung kann darin bestehen, daß die Ringspulen den Ausnehmungen eines Teilkerns liegen, wobei der Abstand der beiden Teilkerne einen Luftspalt bildet. Eine solche Ausbildung ist an sich bei magnetischen Speichervorrichtungen durch die EP-A-0 133 802 bekannt. Die Teilkerne können vorteilhaft als zum Spalt hin einseitig offene Kreisscheibenkerne ausgebildet sein. Als Material für die Teilkerne lassen sich die verschiedensten in der Übertragertechnik bekannten Spulenkernmaterialien, z.B. Ferrite verwenden, wobei sich die Materialauswahl im wesentlichen nach den zu übertragenden Frequenzbereichen richtet.An expedient embodiment of the elementary device described above can consist in that the ring coils lie in the recesses of a partial core, the distance between the two partial cores forming an air gap. Such a design is known per se in magnetic storage devices from EP-A-0 133 802. The Partial cores can advantageously be designed as circular disc cores that are open on one side towards the gap. A wide variety of coil core materials, for example ferrites, known in transformer technology can be used as the material for the partial cores, the choice of material essentially depending on the frequency ranges to be transmitted.

Nach dem beschriebenen Grundprinzip lassen sich elektrische Signale, beispielsweise auf dem Rotor abgenommene Meßgrößen, bei entsprechender Vorverstärkung ab 4µV einwandfrei übertragen.According to the basic principle described, electrical signals, for example measured values taken from the rotor, can be transmitted without problems with appropriate preamplification from 4µV.

Im allgemeinen erscheint die Signalübertragung im Hochfrequenzbereich oberhalb von 30 kHz zweckmäßig. Die zu übertragenden elektrischen Signale können dabei vorteilhaft als Codierung bzw. als Modulation einer Trägerfrequenz übertragen werden. Dabei lassen sich beispielsweise Meßwerte als digitales Signal seriell mit einer Trägerfrequenz von ca. 200 kHz codiert und mit einem 8 bit Datencode mit Start- und Stoppbit und einem Paritätsprüfungsbit von der Rotorplatine auf die Statorplatine über die gekoppelten Ringspulen induktiv übertragen.In general, signal transmission in the high-frequency range above 30 kHz appears expedient. The electrical signals to be transmitted can advantageously be transmitted as coding or as modulation of a carrier frequency. For example, measured values can be coded as a digital signal serially with a carrier frequency of approx. 200 kHz and inductively transmitted with an 8 bit data code with start and stop bit and a parity check bit from the rotor board to the stator board via the coupled ring coils.

In der Statorplatine erfolgt eine Frequenzidentifikation, und es kann gegebenenfalls zweckmäßig eine Umwandlung der Signale in eine normierte computerlesbare Schnittstellencodierung erfolgen.Frequency identification takes place in the stator board and, if appropriate, the signals can advantageously be converted into a standardized computer-readable interface coding.

Eine zusätzliche Verbesserung kann gegebenenfalls dadurch erreicht werden, daß zwischen zwei benachbarten Ringspulen am Rotor bzw. Stator ein Abschirmring aus elektrisch leitfähigem Material, vorzugsweise aus gut leitfähigen metallenen Werkstoffen, z.B. aus Kupfer oder Aluminium angeordnet ist. Dadurch wird eine unerwünschte Signalübertragung zwischen den einzelnen Übertragungspfaden vermieden. Durch Zwischenschaltung eines Abgleichpotentiometers oder dergleichen läßt sich ein solcher Abschirmring über eine Veränderung der Dämpfung vorteilhaft zur Frequenzfeinabstimmung der Sende- bzw. Empfangseinheit benutzen (Mittenfrequenzabgleich des Trägers).An additional improvement can optionally be achieved in that a shielding ring made of electrically conductive material, preferably of highly conductive metallic materials, for example of copper or aluminum, is arranged between two adjacent ring coils on the rotor or stator. This will result in unwanted signal transmission avoided between the individual transmission paths. By interposing an adjustment potentiometer or the like, such a shielding ring can advantageously be used to fine-tune the frequency of the transmitter or receiver unit by changing the damping (center frequency adjustment of the carrier).

Durch die Merkmale der Erfindung wird eine Vorrichtung zur Übertragung von elektrischen Signalen bzw. Spannungen geschaffen, welche eine Darstellung bzw. Auswertung der auf dem Rotor vorgegebenen Meßwerte in Verknüpfung mit der Rotordrehzahl auch bei hohen Drehzahlen und raschen Signaländerungen ermöglicht.The features of the invention provide a device for the transmission of electrical signals or voltages, which enables the measurement values specified on the rotor to be displayed or evaluated in conjunction with the rotor speed even at high speeds and rapid signal changes.

In der Zeichnung ist ein Ausführungsbeispiel des Gegenstandes der Erfindung schematisch dargestellt, aus dem sich weitere Erfindungsmerkmale ergeben; es zeigen:

Fig. 1
einen Längsschnitt durch eine Übertragungsvorrichtung,
Fig. 2
eine Draufsicht auf den als einseitig offener Kreisscheibenkern ausgebildeten Stator aus Fig. 1,
Fig. 3
ein Funktionsschema einer Übertragungsvorrichtung unter Benutzung der in Fig. 1 dargestellten Übertragungsvorrichtung.
In the drawing, an embodiment of the subject matter of the invention is shown schematically, from which further features of the invention result; show it:
Fig. 1
a longitudinal section through a transmission device,
Fig. 2
2 shows a plan view of the stator from FIG. 1 which is designed as a circular disk core which is open on one side,
Fig. 3
a functional diagram of a transmission device using the transmission device shown in Fig. 1.

In Figur 1 und 2 ist eine Übertragungsvorrichtung gezeigt, welche elektrische Signale zwischen einem Rotor und einem Stator und umgekehrt überträgt. Der Rotor enthält einen kreisscheibenförmigen Teilkern 1, welcher mit einer Drehlagerung 2 versehen ist und dessen Antrieb über in der Zeichnung nicht dargestellte Antriebselemente erfolgt. Koaxial zu dem drehbaren kreisscheibenförmigen Teilkern 1 ist ein weiterer kreisscheibenförmiger feststehender Teilkern 3 angeordnet. Die beiden Teilkerne 1 und 3 bestehen aus Ferrit.1 and 2 show a transmission device which transmits electrical signals between a rotor and a stator and vice versa. The rotor contains a circular disc-shaped partial core 1, which is provided with a rotary bearing 2 and is driven by drive elements, not shown in the drawing. A further circular disk-shaped fixed partial core 3 is arranged coaxially with the rotatable circular disk-shaped partial core 1. The two partial cores 1 and 3 consist of ferrite.

Zwischen den Teilkernen 1 und 3 ist ein freier Luftspalt 4 (es wäre auch ein Vakuumspalt bzw. ein Flüssigkeitsspalt möglich!) von etwa 1 mm vorhanden. In den beiden Teilkernen 1,3 befinden sich ringförmige Nutenausnehmungen 5,7,9 und 11 sowie 6,8,10 und 12, in denen induktiv gekoppelte koaxiale Ringspulen 13,15,17 und 19 sowie 14,16,18 und 20 liegen.Between the partial cores 1 and 3 there is a free air gap 4 (a vacuum gap or a liquid gap would also be possible!) Of approximately 1 mm. In the two partial cores 1, 3 there are annular groove recesses 5, 7, 9 and 11, and 6, 8, 10 and 12, in which inductively coupled coaxial toroidal coils 13, 15, 17 and 19 and 14, 16, 18 and 20 are located.

Die Ringspulen des Rotors 13,15,17 und 19 sind wie angedeutet mit einer elektronische Schalt- bzw. Meßelemente enthaltenden Rotorplatine 21 verbunden.The ring coils of the rotor 13, 15, 17 and 19 are, as indicated, connected to a rotor board 21 containing electronic switching or measuring elements.

Die Ringspulen des Stators 14,16,18 und 20 stehen mit entsprechenden ortsfesten Bauelementen 22,23,24,25 zur Signalanzeige bzw. Signalverarbeitung in Verbindung. Dabei kann es sich um beliebige Anordnungen zur digitalen oder analogen Signalverarbeitung und Anzeige handeln, die gegebenenfalls wenigstens teilweise in einer Statorplatine zusammengefaßt sind.The ring coils of the stator 14, 16, 18 and 20 are connected to corresponding stationary components 22, 23, 24, 25 for signal display or signal processing. It can be any arrangement for digital or analog signal processing and display, which are optionally at least partially combined in a stator board.

Zwischen den Ringspulen des Rotors 13,15,17,19 und des Stators 14,16,18,20 sind jeweils in das Material der Teilkerne 1,3 eingebettete Abschirmringe 26,27,28 und 29,30,31 eingelegt, welche als Kurzschlußringe dienen und ein unerwünschtes Übersprechen zwischen den einzelnen Systemen verhindern.Between the ring coils of the rotor 13, 15, 17, 19 and the stator 14, 16, 18, 20, shielding rings 26, 27, 28 and 29, 30, 31 are embedded in the material of the partial cores 1.3, which act as short-circuit rings serve and prevent unwanted crosstalk between the individual systems.

In Figur 3 ist ein Funktionsschema einer Meßeinrichtung dargestellt. Dabei dient das innerste Ringspulenpaar 13,14 zur Spannungsübertragung von einer Wechselspannungsquelle 32 des Stators auf eine Gleichrichtereinheit 33 des Rotors, welche die Betriebsspannung für eine Rotorplatine 21 liefert.FIG. 3 shows a functional diagram of a measuring device. The innermost ring coil pair 13, 14 is used for voltage transmission from an alternating voltage source 32 of the stator to a rectifier unit 33 of the rotor, which supplies the operating voltage for a rotor board 21.

Ein weiteres Ringspulenpaar 15,16 ist zur Übertragung einer Hilfsspannung aus einer Wechselspannungsquelle 34, auf eine Gleichrichtereinheit 35 vorgesehen. Diese Hilfsspannung kann mit Hilfe eines Schalters 36 eingeschaltet werden.Another pair of toroidal coils 15, 16 is provided for transmitting an auxiliary voltage from an AC voltage source 34 to a rectifier unit 35. This auxiliary voltage can be switched on using a switch 36.

Für die Übertragung der auf dem Rotor in einer Meßvorrichtung zu messenden Größen wird das Ringspulenpaar 17,18 benutzt. Die von einem beliebigen Meßgerät stammende Meßspannung UM wird in der Rotorplatine 21 durch eine Verstärkerschaltung verstärkt und in dem A/D-Umsetzer 37 digitalisiert. Die digitalen gegebenenfalls einer Trägerfrequenz aufmodulierten Signale werden über das Ringspulenpaar 17,18 zur Empfängerplatine 38 übertragen.The pair of toroidal coils 17, 18 is used to transmit the quantities to be measured on the rotor in a measuring device. The measuring voltage U M originating from any measuring device is amplified in the rotor board 21 by an amplifier circuit and digitized in the A / D converter 37. The digital signals, optionally modulated onto a carrier frequency, are transmitted to the receiver board 38 via the pair of ring coils 17, 18.

Damit auf der Rotorplatine 21 entsprechende Schaltvorgange ausgelöst werden können, -beispielsweise kann eine Umschaltung des Verstärkungsgrades des Meßverstärkers zur Anpassung an unterschiedliche Meßbereiche zweckmäßig sein- ist ein zusätzliches Ringspulenpaar 19,20 zur Übertragung von Schaltbefehlen vorgesehen. Ein Drucktaster 39 gibt über ein Impulsgerät 40 einen Schaltimpuls in eine rotorseitige Schalteinrichtung 41, welche beispielsweise den Verstärkungsgrad des Meßverstärkers auf der Rotorplatine 21 stufenweise verändert.In order that corresponding switching processes can be triggered on the rotor board 21, for example, a switchover of the degree of amplification of the measuring amplifier can be expedient to adapt to different measuring ranges, an additional pair of ring coils 19, 20 is provided for the transmission of switching commands. A pushbutton 39 sends a switching pulse via a pulse device 40 to a switching device 41 on the rotor side, which, for example, gradually changes the degree of amplification of the measuring amplifier on the rotor board 21.

Von der Statorplatine 38 werden die von der Rotorplatine 21 übertragenen Signale zur direkten Computerverarbeitung an einen Computer 42 weitergeleitet.The signals transmitted by the rotor board 21 are forwarded from the stator board 38 to a computer 42 for direct computer processing.

Zur Überwachung der Drehzahl des Rotors ist ein beispielsweise durch einen rotorseitigen Permanentmagneten betätigtes Sensorelement 43 vorgesehen, welches der Drehzahl entsprechende Signale in eine Anzeigeeinheit 44 eingibt. Die Anzeigeeinheit 44 steht mit der Statorplatine 38 in Verbindung und ermöglicht über einen angeschlossenen Plotter 45 eine graphische Darstellung des Verlaufs der Meßspannung UM in Abhängigkeit von der Rotordrehzahl.To monitor the speed of the rotor, a sensor element 43, which is actuated, for example, by a rotor-side permanent magnet, is provided, which inputs signals corresponding to the speed into a display unit 44. The display unit 44 is connected to the stator board 38 and, via a connected plotter 45, enables a graphic representation of the course of the measuring voltage U M as a function of the rotor speed.

Die Vorrichtung aus dem oben angegebenen Ausführungsbeispiel wurde speziell für die Durchführung eines Analysenverfahrens nach DE-A-29 43 942 entwickelt.The device from the exemplary embodiment specified above was specially developed for carrying out an analysis method according to DE-A-29 43 942.

Claims (5)

  1. Apparatus for transmitting signals that can be broken down into at least one AC voltage component, between a high-speed rotor, above 5000 rpm, and a stator, from a sender unit to a receiver unit, with the help of annular coils, the coil windings of which form parts of the sender or receiver unit and which are arranged coaxially to the axis of rotation of the rotor and which are inductively coupled, at least one pair of annular coils being provided for supplying voltage to components on the rotor, and with at least one further pair of annular coils for transmitting the values to be measured on the rotor with a measuring apparatus from the rotor to the stator, characterised in that the annular coils of the pair of annular coils (17, 18) provided for transmitting the values to be measured on the rotor with a measuring apparatus include at least one pair of annular coils (13, 14; 15, 16) for supplying voltage to components on the rotor, that the annular coils (13-18) furthermore lie in recesses (5 - 10) of core elements (1, 3), in the form of annular disks, the distance between the two core elements forming a gap (4) between the rotor and the stator, that a sensor element (43) for sampling the rotor speed is provided, and that a switching unit (44) is provided, with the aid of which the measured values associated with the rotor speed are further processed and/or displayed.
  2. Apparatus according to claim 1, characterised in that at least one further pair of annular coils (19, 20) is provided for transmitting switching and/or control signals, which triggers switching operations in components (21) arranged on the rotor.
  3. Apparatus according to claim 1, characterised in that the core elements (1, 3), in the form of annular disks, are designed to be open on one side facing the gap (4).
  4. Apparatus according to claim 1, characterised in that a shielding ring (26) made of an electrically conductive material is arranged between two adjacent annular coils (e.g. 13, 15).
  5. Apparatus according to claim 4, characterised in that a balancing potentiometer for fine-tuning the frequency of the sender or receiver unit is interposed in the shielding ring (26).
EP90104899A 1989-03-18 1990-03-15 Transmission device Expired - Lifetime EP0388792B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3908982A DE3908982A1 (en) 1989-03-18 1989-03-18 TRANSMISSION DEVICE
DE3908982 1989-03-18

Publications (2)

Publication Number Publication Date
EP0388792A1 EP0388792A1 (en) 1990-09-26
EP0388792B1 true EP0388792B1 (en) 1993-12-08

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ID=6376692

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Application Number Title Priority Date Filing Date
EP90104899A Expired - Lifetime EP0388792B1 (en) 1989-03-18 1990-03-15 Transmission device

Country Status (8)

Country Link
US (1) US5055775A (en)
EP (1) EP0388792B1 (en)
JP (1) JP2798472B2 (en)
AT (1) ATE98391T1 (en)
CA (1) CA2012408A1 (en)
DE (2) DE3908982A1 (en)
DK (1) DK0388792T3 (en)
ES (1) ES2048879T3 (en)

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Also Published As

Publication number Publication date
JPH0327500A (en) 1991-02-05
JP2798472B2 (en) 1998-09-17
CA2012408A1 (en) 1990-09-18
DK0388792T3 (en) 1994-02-14
DE59003740D1 (en) 1994-01-20
DE3908982A1 (en) 1990-09-27
ES2048879T3 (en) 1994-04-01
ATE98391T1 (en) 1993-12-15
EP0388792A1 (en) 1990-09-26
US5055775A (en) 1991-10-08

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