EP2281293B1 - Inductance and arrangement - Google Patents

Inductance and arrangement Download PDF

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Publication number
EP2281293B1
EP2281293B1 EP09749527.9A EP09749527A EP2281293B1 EP 2281293 B1 EP2281293 B1 EP 2281293B1 EP 09749527 A EP09749527 A EP 09749527A EP 2281293 B1 EP2281293 B1 EP 2281293B1
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EP
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Prior art keywords
winding
inductance
control
main
region
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EP09749527.9A
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German (de)
French (fr)
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EP2281293A1 (en
Inventor
Bernhard Schneider
Thomas Uhl
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SEW Eurodrive GmbH and Co KG
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SEW Eurodrive GmbH and Co KG
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Priority claimed from DE200810024602 external-priority patent/DE102008024602B4/en
Application filed by SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Priority to EP11001711.8A priority Critical patent/EP2357657B1/en
Publication of EP2281293A1 publication Critical patent/EP2281293A1/en
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Publication of EP2281293B1 publication Critical patent/EP2281293B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias
    • 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
    • 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
    • H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F29/146—Constructional details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps

Definitions

  • the invention relates to an inductance arrangement.
  • variable inductance which has two coil windings which are not magnetically coupled together.
  • the inductance of one of the two coil windings is controlled by a direct current.
  • an inductance device comprising a diode and a main winding formed around a leg of a core, the main winding being supplied with alternating current, wherein a control winding is provided on the core, which is supplied with direct current, wherein a supply winding on the core is provided, with which the means for DC power supply is connected.
  • the core in this case has an air gap which is penetrated in the main flow generated by the main winding.
  • the invention is therefore based on the object to develop a system with inductors.
  • the object is achieved in the inductance device according to the features indicated in claim 1.
  • the inductor means it is provided with a control circuit and a means for generating a unipolar current, and with an inductance and that it comprises a main winding, which is executed by at least one leg of a core around, wherein the main winding is supplied with alternating current, wherein a control winding is provided on at least one leg of the core, which is supplied with the unipolar current, and has partial windings, wherein a supply winding is provided on at least one leg of the core, to which the means for generating the unipolar current is connected, wherein the means of the induced voltage, in particular secondary voltage, the supply winding is supplied, the core having an air gap S penetrated in the main flow generated by the main winding, wherein the fluxes generated by the respective partial windings are conducted essentially through regions of the core without an air gap wherein the means for generating the unipolar current comprises a controllable arrangement, such as DC / DC converter, power switch and / or controllable resistor
  • the advantage here is that the value of the inductance is variable to a desired setpoint and tuned.
  • a supply winding is provided on at least one leg of the core, to which means for generating the unipolar current are connected, in particular wherein the means of the induced voltage, in particular secondary voltage, are supplied to the supply winding.
  • the means for generating the unipolar current comprise a controllable arrangement, such as DC / DC converters, power switches and / or controllable resistance.
  • a controllable arrangement such as DC / DC converters, power switches and / or controllable resistance.
  • the core has an air gap S which is penetrated in the main flow produced by the main winding, wherein the flows generated by the respective part windings are conducted essentially through regions of the core without an air gap.
  • the advantage here is that only a small control current is necessary, with which the saturation of the area is allowed, which is penetrated by the main flow of the partial windings.
  • the air gap is arranged only in that region of the core which is essentially exclusively penetrated by the main flow of the main winding, whereby the steepness of the magnetization characteristic curve for the main winding can be reduced.
  • control signals for the control are transmitted without contact and / or galvanically isolated.
  • the advantage here is that no additional effort for galvanic isolation must be operated. Also, it simply allows the control electronics connected to the control coil to operate at a different potential.
  • the means are provided as a control member of a control circuit and connected thereto.
  • the advantage here is that the value of the control current is adjustable, in particular so to a target value.
  • the advantage here is that the induced voltage remains low and yet a field can be generated, which magnetizes the core of the main coil, in particular as a constant field, ie constant field.
  • control winding is designed such that in each case a corresponding number of turns of the other portion is executed alternately after execution of a first number of turns of a portion, in particular wherein the number assumes a value between 1 and 10.
  • the advantage here is that the voltage induced in the first turns voltage remains low and thus the insulation must be performed only against low voltages.
  • a resonant circuit part such as a resonant circuit, a gyrator, or even a transformer can be regulated to a desired value.
  • the inductance is the secondary coil.
  • the advantage here is that even with a quadrupole such as transformer or the like, the inductance is controllable.
  • the inductance is provided in a gyrator arrangement.
  • the advantage here is that the gyrator is adjustable to the desired desired frequency response
  • the inductance is so connected to the inductance of the primary conductor system and such a capacity with the primary conductor system in operative connection is that the associated resulting resonant frequency is tuned to the center frequency.
  • the advantage here is that the efficiency is optimized and aging, weather or temperature-related changes are compensated.
  • the capacitance is arranged in a gyrator arrangement feeding the primary conductor system directly or via a transformer and / or the capacitance is connected in series or in parallel to the inductor connected to the inductance of the primary conductor system.
  • the advantage here is that the vote of the primary conductor system is also executable by means of the controllable inductance.
  • the controllable inductance is connected in series with the primary conductor, So the inductance of the primary conductor.
  • the capacitance provided for achieving the resonance is provided within the gyrator arrangement, from which the primary conductor system is supplied via a transformer.
  • a regulator circuit is provided whose input is connected to a means for detecting the relative phase provided between a voltage and a current, in particular wherein the current of the primary current, and whose output is connected to the controllable inductance as an actuator.
  • the advantage here is that an automatic control is providable, which tracks the value of the resonant frequency even when changing physical parameters by controlling the controllable inductance to the desired value.
  • FIG. 1 is the main winding with the inductance L shown with the terminals E1 and A1.
  • the control winding L2 with the terminals E2 and A2 and the supply winding L3 with the terminals E3 and A3 are provided.
  • the winding of the main winding L is supplied with an alternating current, whereby a voltage is provided to the inductively coupled supply winding ready, which is supplied to a rectifier.
  • the rectified voltage is optionally smoothed with a capacitor and is then fed to a switching element 1, wherein this is operated clocked, for example, pulse width modulated.
  • a switch encompassed by the switching element for example, a controllable power semiconductor switch is closed in each clock period for a first period and opened in a subsequent period.
  • the current flowing through the control winding L2 current is controllable.
  • the time average thus flows a direct current through the control coil L2, whereby thus the core of the main winding undergoes a corresponding magnetization. It is important that the magnetization of the core is not a linear function of the magnetic field generated by the current, but even changes to a saturation behavior for larger current values.
  • the effective inductance L of the main winding is variable depending on the impressed in the control winding current.
  • the control signals for the switching element 1 are contactless and even galvanically separated transferable.
  • an optocoupler on the switching element 1 is provided for this purpose, which is in operative connection with a central control, not shown in the figure.
  • the associated frequency is greater than the center frequency of the current fed into the primary conductor, that is, the current component which is important for the power supply.
  • the high-frequency current component can also be detected by means of the supply coil and can therefore be decoupled from the supply current component in the switching element.
  • control signals only information can be transmitted in further exemplary embodiments according to the invention, wherein an electronic circuit for generating the control signals is then included in the switching element.
  • ferrite materials As a material for the production of the core are suitable ferrite materials or other ferromagnetic or ferrimagnetic materials.
  • the arrangement according to the invention can be used in a system for contactless energy transmission, in which an elongated laid primary conductor is provided, into which a medium-frequency current is impressed, in particular with a frequency between 10 and 500 kHz.
  • the load which can be moved along the primary conductor has a secondary coil, which is inductively coupled to the primary conductor and to which such a capacitance is connected in series or in parallel, so that the associated resonant frequency substantially corresponds to the center frequency.
  • the main winding of the arrangement according to the invention can be used as a secondary winding and the inductance can be changed by means of the current in the control winding, that is to say the resonance frequency can be regulated or tuned to the center frequency.
  • a converter is used whose output stage is supplied from a unipolar voltage, the so-called intermediate circuit voltage, which is generated by a mains-fed rectifier.
  • the output stage comprises half bridges, which each comprise two series-connected pulse-width-modulatedly controlled power semiconductor switches.
  • a medium-frequency voltage can be generated, which is used to power a Gyratoran Aunt is used.
  • a medium-frequency current source which is provided for feeding a primary conductor loop, is produced from the voltage source realized by means of the output stage, wherein the primary conductor loop comprises the primary conductor.
  • a quadrupole which comprises at least one inductance and at least one capacitance, wherein the values of these variables are selected such that the associated resonant frequency essentially corresponds to the center frequency.
  • an arrangement according to the invention can again be used as the inductance, so that the inductance can be tuned to the optimum value or subsequently regulated.
  • aging, moisture, weather, temperature or otherwise caused deviations or drifts in the values can thus be compensated for and / or readjusted.
  • a transformer can be arranged, which is suitable for adapting the inductance. Also for its inductances, the arrangement according to the invention can be used to perform this tunable.
  • the elongated laid primary conductor is connected in total a capacity in series, so that the associated resonant frequency is tuned to the center frequency.
  • an inductance can also be assigned to the tuning, for example in series, whereby this can be implemented as an arrangement according to the invention and thus a tuning to the resonant frequency is made possible.
  • the components mentioned can therefore be equipped with inductors controllable according to the invention and thus tunable to the desired setpoint values.
  • a controllable resistor R is provided which thus determines the value of the main inductance. The way it works is the FIG. 1 executed accordingly.
  • FIG. 3 is instead of the controllable switching element 1 of FIG. 1 a controllable DC / DC converter provided.
  • the way it works is the FIG. 1 executed accordingly.
  • the duty cycle or the duty cycle ⁇ thus determine the inductance.
  • the main winding L is wound around the first E-shaped core 2 and has the terminals E1 and A1.
  • the second E-shaped core provided for closing the magnetic flux issuing from the first E-shaped core has the supply winding L3 about its center leg, the terminals being denoted by E3 and A3.
  • the control winding L2 is embodied in two partial windings, wherein the first part winding is provided in the right main leg and the second part winding in the left main leg.
  • the winding sense of the two partial windings are designed in opposite directions.
  • the flux generated by the main winding L transits from the main leg of the first E-shaped core 2 into the main leg of the second E-shaped core 3 and then divides into two halves, the first in the first main leg and the second half in the second main leg flows.
  • the field generated by the first partial winding of the control winding L2 in the first main leg is added to the flux component generated by the main winding and the field generated by the second partial winding of the control winding L2 is subtracted in the second main leg to the flux component generated by the main winding.
  • a control of the inductance for the positive half-wave of the provided in the main winding L alternating current in the same manner as for the negative half-wave executable.
  • the winding of the control winding is designed such that after a first turn of the first partial winding, the first turn of the second partial winding is performed with the winding sense described above. Thereafter, a turn of the first partial winding is again carried out and continued by further alternating the execution of a turn of the respective partial winding.
  • the E-shaped cores are rotationally symmetrical about their center leg around and thus have the in the FIG. 4 shown E-shaped cross section.
  • the center leg includes a gap, so an air gap.
  • the main legs are designed without an air gap and thus the smallest possible control power necessary. In the main field lines generated by the control winding so no air gap is present and thus only a small control current necessary, so only a small control performance. Even the small stream has a big impact.

Description

Die Erfindung betrifft eine Induktivitätsanordnung. The invention relates to an inductance arrangement.

Es ist bekannt, Induktivitäten mit Kapazitäten zu einer Resonanzschaltung zu verbinden.It is known to connect inductances with capacitances to a resonant circuit.

Aus derFrom the US 5 319 343 AUS 5,319,343 A ist ein integrierter magnetischer Induktor mit Windungen bekannt.is an integrated magnetic inductor with turns known.

Aus derFrom the US 3 631 534 AUS Pat. No. 3,631,534 ist eine variable Induktivität bekannt, welche zwei Spulenwicklungen aufweist, die nicht magnetisch miteinander gekoppelt sind. Die Induktivität einer der beiden Spulenwicklungen ist durch einen Gleichstrom gesteuert.For example, a variable inductance is known which has two coil windings which are not magnetically coupled together. The inductance of one of the two coil windings is controlled by a direct current.

Aus derFrom the US 4 620 144 AUS Pat. No. 4,620,144 ist eine selbstgesteuerte veränderliche Induktivität mit Luftspalten bekannt.is a self-controlled variable inductance with air gaps known.

Aus derFrom the EP 0 443 342 A1EP 0 443 342 A1 ist ein Verfahren zum Steuern eines Energietransfers in einem statischen Umrichter bekannt.For example, a method for controlling energy transfer in a static converter is known.

Aus derFrom the US 2006/220777 A1US 2006/220777 A1 ist eine Induktivitätsanordnung bekannt, mit einer Diode und einer Hauptwicklung, die um einen Schenkel eines Kerns ausgeführt ist, wobei die Hauptwicklung mit Wechselstrom beaufschlagt ist, wobei eine Steuerwicklung auf dem Kern vorgesehen ist, die mit Gleichstrom beaufschlagt ist, wobei eine Versorgungswicklung auf dem Kern vorgesehen ist, mit welcher das Mittel zur Gleichstromversorgung verbunden ist. Der Kern weist hierbei einen Luftspalt auf, welcher im von der Hauptwicklung erzeugten Hauptfluss durchdrungen wird.For example, an inductance device is known, comprising a diode and a main winding formed around a leg of a core, the main winding being supplied with alternating current, wherein a control winding is provided on the core, which is supplied with direct current, wherein a supply winding on the core is provided, with which the means for DC power supply is connected. The core in this case has an air gap which is penetrated in the main flow generated by the main winding.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Anlage mit Induktivitäten weiterzubilden.The invention is therefore based on the object to develop a system with inductors.

Erfindungsgemäß wird die Aufgabe bei der Induktivitätsanordnung nach den in Anspruch 1 angegebenen Merkmalen gelöst.According to the invention the object is achieved in the inductance device according to the features indicated in claim 1.

Wichtige Merkmale der Erfindung bei der Induktivitätsanordnung sind, dass sie mit einer Regelschaltung und mit einem Mittel zur Erzeugung eines unipolaren Stroms und mit einer Induktivität vorgesehen ist und dass sie eine Hauptwicklung umfasst, die um zumindest einen Schenkel eines Kerns herum ausgeführt ist,
wobei die Hauptwicklung mit Wechselstrom beaufschlagt ist,
wobei eine Steuerwicklung auf zumindest einem Schenkel des Kerns vorgesehen ist, die mit dem unipolarem Strom beaufschlagt ist, und Teilwicklungen aufweist,
wobei eine Versorgungswicklung auf zumindest einem Schenkel des Kerns vorgesehen ist, mit der das Mittel zur Erzeugung des unipolaren Stroms verbunden ist, wobei das Mittel aus der induzierter Spannung, insbesondere also Sekundärspannung, der Versorgungswicklung versorgt ist,
wobei der Kern einen Luftspalt S aufweist, welcher im von der Hauptwicklung erzeugten Hauptfluss durchdrungen wird,
wobei die von den jeweiligen Teilwicklungen erzeugte Flüsse im Wesentlichen durch Bereiche des Kerns ohne Luftspalt geleitet sind
wobei das Mittel zur Erzeugung des unipolaren Stroms eine steuerbare Anordnung umfasst, wie DC/DC-Wandler, Leistungsschalter und/oder steuerbarer Widerstand
wobei die Steuersignale zur Ansteuerung berührungslos und/oder galvanisch getrennt übertragen werden,
wobei das Mittel als Steuerglied der Regelschaltung vorgesehen und mit dieser verbunden ist. Are important features of the invention in the inductor means, that it is provided with a control circuit and a means for generating a unipolar current, and with an inductance and that it comprises a main winding, which is executed by at least one leg of a core around,
wherein the main winding is supplied with alternating current,
wherein a control winding is provided on at least one leg of the core, which is supplied with the unipolar current, and has partial windings,
wherein a supply winding is provided on at least one leg of the core, to which the means for generating the unipolar current is connected, wherein the means of the induced voltage, in particular secondary voltage, the supply winding is supplied,
the core having an air gap S penetrated in the main flow generated by the main winding,
wherein the fluxes generated by the respective partial windings are conducted essentially through regions of the core without an air gap
wherein the means for generating the unipolar current comprises a controllable arrangement, such as DC / DC converter, power switch and / or controllable resistor
wherein the control signals for the control are transmitted without contact and / or galvanically isolated,
wherein the means is provided as a control member of the control circuit and connected thereto.

Von Vorteil ist dabei, dass der Wert der Induktivität auf einen gewünschten Sollwert hin veränderbar und abstimmbar ist.The advantage here is that the value of the inductance is variable to a desired setpoint and tuned.

Erfindungsgemäß ist eine Versorgungswicklung auf zumindest einem Schenkel des Kerns vorgesehen, mit der Mittel zur Erzeugung des unipolaren Stroms verbunden sind, insbesondere wobei die Mittel aus der induzierter Spannung, insbesondere also Sekundärspannung, der Versorgungswicklung versorgt sind. Von Vorteil ist dabei, dass die Versorgung der Steuerspule dezentral ermöglicht ist. Es muss also keine Versorgungsleitung zusätzlich zum Primärleiter verlegt werden sondern es genügt die Verlegung des Primärleiters, aus dem die Steuerspule induktiv über die Versorgungsspule versorgbar ist. According to the invention , a supply winding is provided on at least one leg of the core, to which means for generating the unipolar current are connected, in particular wherein the means of the induced voltage, in particular secondary voltage, are supplied to the supply winding. The advantage here is that the supply of the control coil is made possible decentralized. Thus, no supply line must be laid in addition to the primary conductor but it is sufficient to relocate the primary conductor, from which the control coil is inductively supplied via the supply coil.

Erfindungsgemäß umfassen die Mittel zur Erzeugung des unipolaren Stroms eine steuerbare Anordnung, wie DC/DC-Wandler, Leistungsschalter und/oder steuerbarer Widerstand. Von Vorteil ist dabei, dass der Wert des Stromes in der Steuerspule stellbar ist, also steuerbar ist. According to the invention , the means for generating the unipolar current comprise a controllable arrangement, such as DC / DC converters, power switches and / or controllable resistance. The advantage here is that the value of the current in the control coil is adjustable, so it is controllable.

Erfindungsgemäß weist der Kern einen Luftspalt S auf, welcher im von der Hauptwicklung erzeugten Hauptfluss durchdrungen wird, wobei die von den jeweiligen Teilwicklungen erzeugte Flüsse im Wesentlichen durch Bereiche des Kerns ohne Luftspalt geleitet sind. Von Vorteil ist dabei, dass ein nur geringer Steuerstrom notwendig ist, mit dem die Sättigung desjenigen Bereiches ermöglicht ist, der vom Hauptfluss der Teilwicklungen durchdrungen wird. Der Luftspalt ist nur in demjenigen Bereich des Kerns angeordnet, der vom Hauptfluss der Hauptwicklung im Wesentlichen ausschließlich durchdrungen wird, wodurch die Steilheit der Magnetisierungskennlinie für die Hauptwicklung verminderbar ist. According to the invention , the core has an air gap S which is penetrated in the main flow produced by the main winding, wherein the flows generated by the respective part windings are conducted essentially through regions of the core without an air gap. The advantage here is that only a small control current is necessary, with which the saturation of the area is allowed, which is penetrated by the main flow of the partial windings. The air gap is arranged only in that region of the core which is essentially exclusively penetrated by the main flow of the main winding, whereby the steepness of the magnetization characteristic curve for the main winding can be reduced.

Erfindungsgemäß werden die Steuersignale zur Ansteuerung berührungslos und/oder galvanisch getrennt übertragen. Von Vorteil ist dabei, dass kein zusätzlicher Aufwand für galvanische Trennung betrieben werden muss. Außerdem ist es einfach ermöglicht, dass die mit der Steuerspule verbundene Steuerelektronik auf verschiedenem Potential arbeitet. According to the invention , the control signals for the control are transmitted without contact and / or galvanically isolated. The advantage here is that no additional effort for galvanic isolation must be operated. Also, it simply allows the control electronics connected to the control coil to operate at a different potential.

Erfindungsgemäß sind die Mittel als Steuerglied einer Regelschaltung vorgesehen und mit dieser verbunden. Von Vorteil ist dabei, dass der Wert des Steuerstromes regelbar ist, insbesondere also auf einen Sollwert hin.According to the invention , the means are provided as a control member of a control circuit and connected thereto. The advantage here is that the value of the control current is adjustable, in particular so to a target value.

Bei einer vorteilhaften Ausgestaltung weist die Steuerwicklung zumindest zwei Teilwicklungen auf, deren Wicklungssinn derart ausgeführt ist,

  • dass die Richtung des im vom ersten Teilbereich der Steuerwicklung umfassten Bereich erzeugten Hauptflusses der Richtung des von der Hauptwicklung bei Beaufschlagung positivem Strom erzeugten Flusses in diesem Bereich entspricht,
  • und dass die Richtung des im vom zweiten Teilbereich der Steuerwicklung umfassten Bereich erzeugten Hauptflusses der Richtung des von der Hauptwicklung bei Beaufschlagung mit negativem Strom erzeugten Flusses in diesem zweiten Bereich, insbesondere also im vom zweiten Teilbereich der Steuerwicklung umfassten Bereich, entspricht.
In an advantageous embodiment, the control winding has at least two partial windings whose winding sense is designed such
  • in that the direction of the main flow generated in the region encompassed by the first subregion of the control winding corresponds to the direction of the flow generated by the main winding when subjected to a positive current in this region,
  • and that the direction of the main flow generated in the region encompassed by the second subregion of the control winding corresponds to the direction of the flow generated by the main winding upon application of negative current in this second region, in particular in the region encompassed by the second subregion of the control winding.

Von Vorteil ist dabei, dass die induzierte Spannung gering bleibt und trotzdem ein Feld erzeugbar ist, das den Kern der Hauptspule magnetisiert, insbesondere als Gleichfeld, also konstantes Feld.The advantage here is that the induced voltage remains low and yet a field can be generated, which magnetizes the core of the main coil, in particular as a constant field, ie constant field.

Bei einer vorteilhaften Ausgestaltung ist die Steuerwicklung derart ausgeführt, dass jeweils abwechselnd nach Ausführung einer ersten Anzahl von Windungen eines Teilbereiches eine entsprechende Anzahl von Windungen des anderen Teilbereichs ausgeführt ist, insbesondere wobei die Anzahl einen Wert zwischen 1 und 10 annimmt. Von Vorteil ist dabei, dass die in den ersten Windungen induzierte Spannung gering bleibt und somit auch die Isolierung nur gegen geringe Spannungen ausgeführt werden muss.In an advantageous embodiment, the control winding is designed such that in each case a corresponding number of turns of the other portion is executed alternately after execution of a first number of turns of a portion, in particular wherein the number assumes a value between 1 and 10. The advantage here is that the voltage induced in the first turns voltage remains low and thus the insulation must be performed only against low voltages.

Bei einer Anordnung zur berührungslosen Energieübertragung ist vorteiligerweise vorsehbar, dass ein mittelfrequenter Strom in ein langgestreckt ausgeführtes Primärleitersystem eingespeist wird,
wobei Verbraucher aus einer mit dem Primärleitersystem induktiv gekoppelt vorgesehenen Sekundärspule versorgt sind,
wobei der Sekundärspule eine derartige Kapazität in Reihe oder parallel zugeschaltet ist, dass die zugehörige Resonanzfrequenz im Wesentlichen der Mittelfrequenz, insbesondere zwischen 10 und 500 kHz, des Stromes entspricht,
wobei eine steuerbare Induktivität vorgesehen ist In an arrangement for the contactless transmission of energy is vorteiligerweise possible to provide for a medium-frequency current is fed into an elongate engineered primary conductor system,
wherein consumers are supplied from a secondary coil inductively coupled to the primary conductor system,
wherein the secondary coil is connected in series or in parallel with such a capacitance that the associated resonant frequency substantially corresponds to the center frequency, in particular between 10 and 500 kHz, of the current,
wherein a controllable inductance is provided

Von Vorteil ist dabei, dass ein auf Resonanz angelegter Schaltungsteil, wie beispielsweise ein Resonanzschwingkreis, eine Gyratoranordnung, oder auch ein Transformator auf einen gewünschten Wert hin regelbar sind.The advantage here is that a resonant circuit part, such as a resonant circuit, a gyrator, or even a transformer can be regulated to a desired value.

Insbesondere ist die Induktivität die Sekundärspule. Von Vorteil ist dabei, dass auch bei einem Vierpol wie Trafo oder dergleichen die Induktivität steuerbar ist. In particular , the inductance is the secondary coil. The advantage here is that even with a quadrupole such as transformer or the like, the inductance is controllable.

Vorzugsweise ist die Induktivität in einer Gyratoranordnung vorgesehen ist. Von Vorteil ist dabei, dass die Gyratoranordnung auf den gewünschten Soll-Frequenzverlauf hin einstellbar ist Preferably , the inductance is provided in a gyrator arrangement. The advantage here is that the gyrator is adjustable to the desired desired frequency response

Vorzugsweise ist die Induktivität derart mit der Induktivität des Primärleitersystem verbunden ist und eine derartige Kapazität mit dem Primärleitersystem in Wirkverbindung ist, dass die zugehörige resultierende Resonanzfrequenz auf die Mittelfrequenz abstimmbar ist. Von Vorteil ist dabei, dass der Wirkungsgrad optimierbar ist und alterungs-, witterungs- oder temperaturbedingte Veränderungen ausgleichbar sind. Preferably, the inductance is so connected to the inductance of the primary conductor system and such a capacity with the primary conductor system in operative connection is that the associated resulting resonant frequency is tuned to the center frequency. The advantage here is that the efficiency is optimized and aging, weather or temperature-related changes are compensated.

Vorzugsweise ist die Kapazität in einer das Primärleitersystem direkt oder über einen Transformator speisenden Gyratoranordnung angeordnet
und/oder die Kapazität ist in Reihe oder parallel beschaltet zur mit der Induktivität des Primärleitersystem verbundenen Induktivität vorgesehen. Von Vorteil ist dabei, dass die Abstimmung des Primärleitersystems ebenfalls mittels der steuerbaren Induktivität ausführbar ist. Hierbei wird die steuerbare Induktivität in Reihe geschaltet zum Primärleiter,
also zur Induktivität des Primärleiters. Die zur Erreichung der Resonanz vorgesehene Kapazität ist innerhalb der Gyratoranordnung vorgesehen, aus der das Primärleitersystem über einen Transformator hinweg versorgt wird. Preferably , the capacitance is arranged in a gyrator arrangement feeding the primary conductor system directly or via a transformer
and / or the capacitance is connected in series or in parallel to the inductor connected to the inductance of the primary conductor system. The advantage here is that the vote of the primary conductor system is also executable by means of the controllable inductance. In this case, the controllable inductance is connected in series with the primary conductor,
So the inductance of the primary conductor. The capacitance provided for achieving the resonance is provided within the gyrator arrangement, from which the primary conductor system is supplied via a transformer.

Vorzugsweise ist eine Reglerschaltung vorgesehen, deren Eingang mit einem Mittel zur Erfassung der relativen Phasenlage zwischen einer Spannung und einem Strom vorgesehen ist, insbesondere wobei der Strom der Primärstrom ist, und deren Ausgang mit der steuerbaren Induktivität als Stellglied verbunden ist. Von Vorteil ist dabei, dass eine automatische Regelung vorsehbar ist, die auch bei Veränderung von physikalischen Parametern den Wert der Resonanzfrequenz nachführt, indem sie die steuerbare Induktivität auf den gewünschten Wert hin regelt. Preferably, a regulator circuit is provided whose input is connected to a means for detecting the relative phase provided between a voltage and a current, in particular wherein the current of the primary current, and whose output is connected to the controllable inductance as an actuator. The advantage here is that an automatic control is providable, which tracks the value of the resonant frequency even when changing physical parameters by controlling the controllable inductance to the desired value.

Weitere Vorteile ergeben sich aus den Unteransprüchen.Further advantages emerge from the subclaims.

Die Erfindung wird nun anhand von Abbildungen näher erläutert:

  • In der Figur 1 ist der schematische Schaltplan eines ersten erfindungsgemäßen Ausführungsbeispiels gezeigt. In der Figur 2 ist ein weiteres Ausführungsbeispiel gezeigt, wobei statt des Schaltgliedes 1 ein steuerbarer Widerstand verwendet ist. In der Figur 3 ist ein anderes Ausführungsbeispiel gezeigt, wobei statt des Schaltgliedes 1 der Figur 1 ein DC/DC-Wandler gezeigt ist. In der Figur 4 ist eine Induktivität mit zwei zueinander zugewandten E-förmigem Kernen gezeigt, wobei Wicklungen symbolisch angedeutet sind.
The invention will now be explained in more detail with reference to figures:
  • In the FIG. 1 the schematic diagram of a first embodiment of the invention is shown. In the FIG. 2 a further embodiment is shown, wherein instead of the switching element 1, a controllable resistor is used. In the FIG. 3 another embodiment is shown, wherein instead of the switching element 1 of the FIG. 1 a DC / DC converter is shown. In the FIG. 4 an inductance is shown with two mutually facing E-shaped cores, with windings are symbolically indicated.

In der Figur 1 ist die Hauptwicklung mit der Induktivität L dargestellt mit den Anschlüssen E1 und A1. Induktiv gekoppelt, also beispielsweise auf den Kern der Hauptwicklung gewickelt, sind die Steuerwicklung L2 mit den Anschlüssen E2 und A2 und die Versorgungswicklung L3 mit den Anschlüssen E3 und A3 vorgesehen. Dabei wird die Wicklung der Hauptwicklung L mit einem Wechselstrom gespeist, wodurch an der induktiv gekoppelten Versorgungswicklung eine Spannung bereit stellbar ist, die einem Gleichrichter zugeführt wird. Die gleichgerichtete Spannung ist optional mit einem Kondensator glättbar und wird dann einem Schaltglied 1 zugeführt, wobei dieses getaktet betrieben wird, beispielsweise pulsweitenmoduliert. Hierbei wird in jeder Taktperiode für einen ersten Zeitabschnitt ein vom Schaltglied umfasster Schalter, beispielsweise ein steuerbarer Leistungshalbleiterschalter, geschlossen und in einem nachfolgenden Zeitabschnitt geöffnet. Auf diese Weise ist der durch die Steuerwicklung L2 fließende Strom steuerbar. Im zeitlichen Mittel fließt also ein Gleichstrom durch die Steuerwicklung L2, wodurch somit der Kern der Hauptwicklung eine entsprechende Magnetisierung erfährt. Hierbei ist wichtig, dass die Magnetisierung des Kerns keine lineare Funktion des durch den Strom erzeugten Magnetfeldes ist sondern bei größeren Stromwerten sogar in ein Sättigungsverhalten übergeht.In the FIG. 1 is the main winding with the inductance L shown with the terminals E1 and A1. Inductively coupled, for example wound on the core of the main winding, the control winding L2 with the terminals E2 and A2 and the supply winding L3 with the terminals E3 and A3 are provided. In this case, the winding of the main winding L is supplied with an alternating current, whereby a voltage is provided to the inductively coupled supply winding ready, which is supplied to a rectifier. The rectified voltage is optionally smoothed with a capacitor and is then fed to a switching element 1, wherein this is operated clocked, for example, pulse width modulated. In this case, a switch encompassed by the switching element, for example, a controllable power semiconductor switch is closed in each clock period for a first period and opened in a subsequent period. In this way, the current flowing through the control winding L2 current is controllable. In the time average thus flows a direct current through the control coil L2, whereby thus the core of the main winding undergoes a corresponding magnetization. It is important that the magnetization of the core is not a linear function of the magnetic field generated by the current, but even changes to a saturation behavior for larger current values.

Auf diese Weise ist also die effektive Induktivität L der Hauptwicklung veränderbar abhängig vom in die Steuerwicklung eingeprägten Strom. Mittels der Versorgungswicklung ist somit eine von weiteren elektronischen Schaltungen galvanisch getrennte Versorgung ermöglicht, die auch räumlich weit entfernt einsetzbar ist ohne hierzu notwendige Versorgungskabel.In this way, therefore, the effective inductance L of the main winding is variable depending on the impressed in the control winding current. By means of the supply winding thus one of other electronic circuits galvanically isolated supply is possible, which is also widely used far away without this necessary supply cable.

Die Steuersignale für das Schaltglied 1 sind berührungslos und sogar galvanisch getrennt übertragbar. Beispielsweise ist hierzu ein Optokoppler am Schaltglied 1 vorgesehen, das mit einer in der Figur nicht gezeigten zentralen Steuerung in Wirkverbindung ist. Alternativ ist auch ein auf den Primärleiter aufmodulierter hochfrequenter Stromanteil zur Übertragung der Steuersignale für das Schaltglied verwendbar. Die zugehörige Frequenz ist größer als die Mittelfrequenz des in den Primärleiter eingespeisten Stromes, also des für die Leistungsversorgung wesentlichen Stromanteils. Mittels der Versorgungsspule ist auch der hochfrequente Stromanteil detektierbar und somit im Schaltglied abkoppelbar vom Versorgungsstromanteil.The control signals for the switching element 1 are contactless and even galvanically separated transferable. For example, an optocoupler on the switching element 1 is provided for this purpose, which is in operative connection with a central control, not shown in the figure. Alternatively it is Also, a modulated on the primary conductor high-frequency current component for transmitting the control signals for the switching element used. The associated frequency is greater than the center frequency of the current fed into the primary conductor, that is, the current component which is important for the power supply. The high-frequency current component can also be detected by means of the supply coil and can therefore be decoupled from the supply current component in the switching element.

Anstatt der genannten Steuersignale sind in weiteren erfindungsgemäßen Ausführungsbeispielen auch nur Informationen übertragbar, wobei dann im Schaltglied eine elektronische Schaltung zur Erzeugung der Steuersignale umfasst ist.Instead of the above-mentioned control signals, only information can be transmitted in further exemplary embodiments according to the invention, wherein an electronic circuit for generating the control signals is then included in the switching element.

Als Material zur Herstellung des Kerns eigenen sich Ferrit-Materialien oder auch andere ferromagnetischen oder ferrimagnetischen Materialien.As a material for the production of the core are suitable ferrite materials or other ferromagnetic or ferrimagnetic materials.

Die erfindungsgemäße Anordnung ist bei einem System zur berührungslosen Energieübertragung verwendbar, bei dem ein langgestreckt verlegter Primärleiter vorgesehen ist, in den ein mittelfrequenter Stromeingeprägt wird, insbesondere mit einer Frequenz zwischen 10 und 500 kHz. Der entlang dem Primärleiter bewegbare Verbraucher weist eine Sekundärspule auf, die induktiv mit dem Primärleiter gekoppelt ist und der eine derartige Kapazität in Reihe oder parallel zugeschaltet ist, so dass die zugehörige Resonanzfrequenz im Wesentlichen der Mittelfrequenz entspricht. Hierbei ist die Hauptwicklung der erfindungsgemäßen Anordnung als Sekundärwicklung verwendbar und mittels des Stromes in der Steuerwicklung die Induktivität veränderbar, also die Resonanzfrequenz auf die Mittelfrequenz hin regelbar oder abstimmbar. Mittels der resonanten Übertragung sind aus der Sekundärwicklung versorgte Verbraucher mit einem nur geringfügig schwankenden Wirkungsgrad versorgbar bei schwankendem Abstand zwischen Primärleiter und Sekundärspule.The arrangement according to the invention can be used in a system for contactless energy transmission, in which an elongated laid primary conductor is provided, into which a medium-frequency current is impressed, in particular with a frequency between 10 and 500 kHz. The load which can be moved along the primary conductor has a secondary coil, which is inductively coupled to the primary conductor and to which such a capacitance is connected in series or in parallel, so that the associated resonant frequency substantially corresponds to the center frequency. In this case, the main winding of the arrangement according to the invention can be used as a secondary winding and the inductance can be changed by means of the current in the control winding, that is to say the resonance frequency can be regulated or tuned to the center frequency. By means of the resonant transmission supplied from the secondary winding consumers can be supplied with a slightly fluctuating efficiency with varying distance between the primary conductor and the secondary coil.

Des Weiteren wird zur Erzeugung des mittelfrequenten Stromes für den Primärleiter ein Umrichter verwendet, dessen Endstufe aus einer unipolaren Spannung, der sogenannten Zwischenkreisspannung, versorgt wird, die von einem netzgespeisten Gleichrichter erzeugt wird. Die Endstufe umfasst hierbei Halbbrücken, welche jeweils zwei in Reihe geschaltete pulsweitenmoduliert angesteuerte Leistungshalbleiterschalter umfassen. Auf diese Weise ist eine mittelfrequente Spannung erzeugbar, die zur Speisung einer Gyratoranordnung verwendet ist. Mittels der Gyratoranordnung wird aus der mittels der Endstufe realisierten Spannungsquelle eine mittelfrequente Stromquelle hergestellt, die zur Speisung einer Primärleiterschleife vorgesehen ist, wobei die Primärleiterschleife den Primärleiter umfasst.Furthermore, to generate the medium-frequency current for the primary conductor, a converter is used whose output stage is supplied from a unipolar voltage, the so-called intermediate circuit voltage, which is generated by a mains-fed rectifier. In this case, the output stage comprises half bridges, which each comprise two series-connected pulse-width-modulatedly controlled power semiconductor switches. In this way, a medium-frequency voltage can be generated, which is used to power a Gyratoranordnung is used. By means of the gyrator arrangement, a medium-frequency current source, which is provided for feeding a primary conductor loop, is produced from the voltage source realized by means of the output stage, wherein the primary conductor loop comprises the primary conductor.

Als Gyratoranordnung wird ein Vierpol verwendet, der mindestens eine Induktivität und mindestens eine Kapazität umfasst, wobei die Werte dieser Größen derart gewählt sind, dass die zugehörige Resonanzfrequenz der Mittelfrequenz im Wesentlichen entspricht. Hierzu ist als Induktivität wiederum eine erfindungsgemäße Anordnung verwendbar, so dass die Induktivität auf den optimalen Wert abstimmbar oder darauf hin regelbar ist.As a gyrator arrangement, a quadrupole is used which comprises at least one inductance and at least one capacitance, wherein the values of these variables are selected such that the associated resonant frequency essentially corresponds to the center frequency. For this purpose, an arrangement according to the invention can again be used as the inductance, so that the inductance can be tuned to the optimum value or subsequently regulated.

Vorteiligerweise sind somit alterungs-, feuchtigkeits-, witterungs-, temperaturbedingte oder anderweitig bedingte Abweichungen oder Drifte der Werte ausgleichbar und/oder nachregelbar.Advantageously, aging, moisture, weather, temperature or otherwise caused deviations or drifts in the values can thus be compensated for and / or readjusted.

Zwischen dem Ausgang des Gyrators und der Primärleiterschleife ist ein Transformator anordenbar, der zur Anpassung der Induktivität verwendbar ist. Auch für dessen Induktivitäten ist die erfindungsgemäße Anordnung einsetzbar, um diese abstimmbar auszuführen.Between the output of the gyrator and the primary conductor loop, a transformer can be arranged, which is suitable for adapting the inductance. Also for its inductances, the arrangement according to the invention can be used to perform this tunable.

Dem langgestreckt verlegten Primärleiter ist insgesamt eine Kapazität in Reihe beschaltet, so dass die zugehörige Resonanzfrequenz auf die Mittelfrequenz abzustimmen ist. Bei räumlich weit ausgedehnten Anlagen ist es hierbei vorteilhaft, den Primärleiter in Abschnitte aufzuteilen und jedem Abschnitt eine Teilkapazität zuzuordnen. Zusätzlich ist zur Abstimmung auch eine Induktivität zuordenbar, beispielsweise in Reihe, wobei diese als erfindungsgemäße Anordnung ausführbar ist und somit eine Abstimmung auf die Resonanzfrequenz ermöglicht ist.The elongated laid primary conductor is connected in total a capacity in series, so that the associated resonant frequency is tuned to the center frequency. In spatially widely extended systems, it is advantageous here to divide the primary conductor into sections and assign each section a partial capacity. In addition, an inductance can also be assigned to the tuning, for example in series, whereby this can be implemented as an arrangement according to the invention and thus a tuning to the resonant frequency is made possible.

Die genannten Komponenten sind also mit erfindungsgemäß steuerbaren Induktivitäten ausstattbar und somit abstimmbar auf die gewünschten Sollwerte.The components mentioned can therefore be equipped with inductors controllable according to the invention and thus tunable to the desired setpoint values.

In der Figur 2 ist statt des steuerbaren Schaltgliedes 1 ein steuerbarer Widerstand R vorgesehen, der somit den Wert der Hauptinduktivität bestimmt. Die Funktionsweise ist der Figur 1 entsprechend ausgeführt.In the FIG. 2 Instead of the controllable switching element 1, a controllable resistor R is provided which thus determines the value of the main inductance. The way it works is the FIG. 1 executed accordingly.

In der Figur 3 ist statt des steuerbaren Schaltgliedes 1 der Figur 1 ein steuerbarer DC/DC-Wandler vorgesehen. Die Funktionsweise ist der Figur 1 entsprechend ausgeführt. Der Tastgrad oder das Tastverhältnis δ bestimmen somit die Induktivität.In the FIG. 3 is instead of the controllable switching element 1 of FIG. 1 a controllable DC / DC converter provided. The way it works is the FIG. 1 executed accordingly. The duty cycle or the duty cycle δ thus determine the inductance.

In der Figur 4 ist eine beispielhafte Ausführung der steuerbaren Hauptinduktivität erfindungsgemäßen Anordnung gezeigt. Hierbei ist die Hauptwicklung L um den ersten E-förmigen Kern 2 gewickelt und weist die Anschlüsse E1 und A1 auf. Der zum Schließen des aus dem ersten E-förmigen Kern austretenden Magnetflusses vorgesehene zweite E-förmige Kern weist um seinen Mittelschenkel die Versorgungswicklung L3 auf, wobei die Anschlüsse mit E3 und A3 bezeichnet sind. Die Steuerwicklung L2 ist in zwei Teilwicklungen ausgeführt, wobei die erste Teilwicklung im rechten Hauptschenkel und die zweite Teilwicklung im linken Hauptschenkel vorgesehen ist. Die Wicklungssinne der beiden Teilwicklungen sind gegenläufig ausgeführt. Der von der Hauptwicklung L erzeugte Fluss geht vom Hauptschenkel des ersten E-förmigen Kerns 2 in den Hauptschenkel des zweiten E-förmigen Kerns 3 über und teilt sich dann in zwei Hälften auf, wobei die erste im ersten Hauptschenkel und die zweite Hälfte im zweiten Hauptschenkel fließt. Somit wird das von der ersten Teilwicklung der Steuerwicklung L2 erzeugte Feld im ersten Hauptschenkel auf den von der Hauptwicklung erzeugten Flussanteil aufaddiert und das von der zweiten Teilwicklung der Steuerwicklung L2 erzeugte Feld im zweiten Hauptschenkel auf den von der Hauptwicklung erzeugten Flussanteil subtrahiert. Auf diese Weise ist eine Steuerung der Induktivität für die positive Halbwelle des in der Hauptwicklung L vorgesehenen Wechselstromes in gleicher Weise wie für die negative Halbwelle ausführbar.In the FIG. 4 an exemplary embodiment of the controllable main inductor arrangement according to the invention is shown. Here, the main winding L is wound around the first E-shaped core 2 and has the terminals E1 and A1. The second E-shaped core provided for closing the magnetic flux issuing from the first E-shaped core has the supply winding L3 about its center leg, the terminals being denoted by E3 and A3. The control winding L2 is embodied in two partial windings, wherein the first part winding is provided in the right main leg and the second part winding in the left main leg. The winding sense of the two partial windings are designed in opposite directions. The flux generated by the main winding L transits from the main leg of the first E-shaped core 2 into the main leg of the second E-shaped core 3 and then divides into two halves, the first in the first main leg and the second half in the second main leg flows. Thus, the field generated by the first partial winding of the control winding L2 in the first main leg is added to the flux component generated by the main winding and the field generated by the second partial winding of the control winding L2 is subtracted in the second main leg to the flux component generated by the main winding. In this way, a control of the inductance for the positive half-wave of the provided in the main winding L alternating current in the same manner as for the negative half-wave executable.

Weiterer Vorteil ist bei der geschilderten Ausführung der Teilwicklung, dass die vom in die Hauptwicklung eingespeisten Wechselstrom in die Steuerwicklung induzierte Spannung im Wesentlichen verschwindet. Vorzugsweise wird die Wicklung der Steuerwicklung derart ausgeführt, dass nach einer ersten Windung der ersten Teilwicklung die erste Windung der zweiten Teilwicklung mit dem oben beschriebenen Wicklungssinn ausgeführt wird. Danach wird wiederum eine Windung der ersten Teilwicklung ausgeführt und durch weiteres Abwechseln des Ausführens einer Windung der jeweiligen Teilwicklung fortgefahren.Another advantage is in the described embodiment of the partial winding, that the voltage fed into the main winding from the induced current in the control winding voltage substantially disappears. Preferably, the winding of the control winding is designed such that after a first turn of the first partial winding, the first turn of the second partial winding is performed with the winding sense described above. Thereafter, a turn of the first partial winding is again carried out and continued by further alternating the execution of a turn of the respective partial winding.

Um den Fertigungsaufwand und die Wicklungslänge zu verringern, ist es auch vorteilig, statt in der geschilderten Weise in abwechselnder Reihenfolge nur eine Windung jeder Teilwicklung auszuführen, mehrere Windungen der jeweiligen Teilwicklung auszuführen. Auch auf diese Weise ist die an der Steuerwicklung insgesamt auftretende induzierte Spannung reduzierbar.In order to reduce the manufacturing costs and the winding length, it is also advantageous, instead of the described manner in alternating order, only one turn each Execute partial winding to perform several turns of each sub-winding. In this way too, the induced voltage which occurs overall on the control winding can be reduced.

Vorzugsweise sind die E-förmigen Kerne rotationssymmetrisch um ihren Mittelschenkel herum ausgeführt und weisen somit den in der Figur 4 gezeigten E-förmigen Querschnitt auf.Preferably, the E-shaped cores are rotationally symmetrical about their center leg around and thus have the in the FIG. 4 shown E-shaped cross section.

Wichtig ist bei der Figur 4 auch, dass der Mittelschenkel einen Spalt, also einen Luftabstand umfasst. Vorteiligerweise sind die Hauptschenkel ohne Luftspalt ausgeführt und somit eine möglichst kleine Steuerleistung notwendig. In den von der Steuerwicklung erzeugten hauptsächlichen Feldlinien ist also kein Luftspalt vorhanden und somit nur ein kleiner Steuerstrom notwendig, also auch nur eine kleine Steuerleistung. Schon der kleine Strom hat also eine große Wirkung.Important is in the FIG. 4 also that the center leg includes a gap, so an air gap. Advantageously, the main legs are designed without an air gap and thus the smallest possible control power necessary. In the main field lines generated by the control winding so no air gap is present and thus only a small control current necessary, so only a small control performance. Even the small stream has a big impact.

Anstatt einer Versorgungsspule ist auch eine Gleichstromversorgung von einer nicht gezeigten zusätzlichen Versorgungsschaltung ausführbar.Instead of a supply coil and a DC power supply from an additional supply circuit, not shown, executable.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
ansteuerbarer Schaltgliedcontrollable switching element
22
erster E-förmiger Kernfirst E-shaped core
33
zweiter E-förmiger Kernsecond E-shaped core
LL
Induktivität der HauptwicklungInductance of the main winding
L2L2
Induktivität der SteuerwicklungInductance of the control winding
L3L3
Induktivität der VersorgungswicklungInductance of the supply winding
E1, A1E1, A1
Anschlüsse der HauptwicklungConnections of the main winding
E2, A2E2, A2
Anschlüsse der SteuerwicklungConnections of the control winding
E3, A3E3, A3
Anschlüsse der VersorgungswicklungConnections of the supply winding
SS
Luftspaltair gap
SWSW
Schalterstellungswitch position
RR
Widerstandswertresistance
δδ
Tastgrad, TastverhältnisDuty cycle, duty cycle

Claims (4)

  1. Inductance arrangement with a regulating circuit and with a means for generating a unipolar current and with an inductance (L), comprising a main winding which is formed around at least one limb of a core (2, 3),
    wherein the main winding is supplied with alternating current, wherein a control winding is provided on at least one limb of the core (2, 3), which control winding is supplied with the unipolar current, and has part-windings,
    wherein a supply winding is provided on at least one limb of the core (2, 3), to which supply winding the means for generating the unipolar current is connected,
    wherein the means is supplied from the induced voltage, in particular therefore secondary voltage, of the supply winding, wherein the core (2, 3) has an air gap S which is penetrated in the main flux generated by the main winding,
    wherein the fluxes generated by the respective part-windings are substantially conducted through regions of the core (2, 3) without an air gap S,
    characterised in that
    the means for generating the unipolar current comprises a controllable arrangement, such as DC/DC converter, power switch and/or controllable resistance,
    in that the control signals for control are transmitted in a contactless and/or galvanically isolated manner,
    and in that the means is provided as control element of the regulating circuit and connected to the latter.
  2. Inductance arrangement according to Claim 1,
    characterised in that
    the control winding has at least two part-windings, the winding sense of which is designed in such a manner
    - that the direction of the main flux generated in the region comprised by the first part-region of the control winding corresponds to the direction of the flux generated by the main winding when being supplied with positive current in this region,
    - and in that the direction of the main flux generated in the region comprised by the second part-region of the control winding corresponds to the direction of the flux generated by the main winding when being supplied with negative current in this second region,
    in particular therefore in the region comprised by the second part-region of the control winding.
  3. Inductance arrangement according to Claim 1 or 2,
    characterised in that
    the control winding is implemented in such a manner that in each case alternately after implementation of a first number of turns of a part-region a corresponding number of turns of the other part-region is implemented, in particular wherein the number assumes a value between 1 and 10.
  4. Inductance arrangement according to at least one of the preceding claims,
    characterised in that
    the inductance (L) is provided in a gyrator arrangement.
EP09749527.9A 2008-05-21 2009-04-22 Inductance and arrangement Active EP2281293B1 (en)

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CN102037525B (en) 2014-01-15
DE102008064640A1 (en) 2009-12-03
WO2009141037A1 (en) 2009-11-26
EP2357657A2 (en) 2011-08-17
CN102037525A (en) 2011-04-27
EP2281293A1 (en) 2011-02-09
EP2357657A3 (en) 2014-09-24
EP2357657B1 (en) 2015-11-11

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