WO2001039228A1 - Electromagnetic switching device - Google Patents

Electromagnetic switching device Download PDF

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Publication number
WO2001039228A1
WO2001039228A1 PCT/DE2000/004058 DE0004058W WO0139228A1 WO 2001039228 A1 WO2001039228 A1 WO 2001039228A1 DE 0004058 W DE0004058 W DE 0004058W WO 0139228 A1 WO0139228 A1 WO 0139228A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
switching device
measuring
magnetic flux
magnet system
Prior art date
Application number
PCT/DE2000/004058
Other languages
German (de)
French (fr)
Inventor
Johann Bauer
Norbert Elsner
Gerd Griepentrog
Reinhard Herbst
Reinhard Maier
Fritz Pohl
Diethard Runggaldier
Gerhard SCHRÖTHER
Bernhard Streich
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2001039228A1 publication Critical patent/WO2001039228A1/en

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Classifications

    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2804—Printed windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
    • H01H2047/046—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current with measuring of the magnetic field, e.g. of the magnetic flux, for the control of coil current
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/08—Magnetic details
    • H05K2201/083—Magnetic materials
    • H05K2201/086—Magnetic materials for inductive purposes, e.g. printed inductor with ferrite core
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09009—Substrate related
    • H05K2201/09063—Holes or slots in insulating substrate not used for electrical connections
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10151—Sensor

Definitions

  • the invention relates to a switching device, in particular a relay or contactor with a magnet system, which comprises a yoke, an armature, a coil for exciting the magnet system and means for measuring the magnetic flux.
  • a generic switching device is known from DE 197 00 521 C2.
  • the magnet system is designed as a U-core with a yoke, an armature and a coil body with a coil.
  • a magnetic field sensor for detecting the magnetic flux is mounted on the coil former in a forced air gap.
  • WO 82/02 115 discloses an electronic circuit arrangement for controlling an electromagnetic component, in particular a choke or a coil of an electromagnetic switching device having a magnetic circuit with a coil, yoke and armature.
  • the current through the component is regulated so that the magnetic flux remains constant regardless of the supply voltage.
  • the same switching device can be used for a large voltage range, with the armature always being securely tightened.
  • a Hall probe is used to control the actual induction value.
  • the regulation of the coil voltage to a constant magnetic flux in the electronically controlled contactor enables a smooth closing process, which results in a longer service life of the contactor drive and the switching elements due to the lower contact separation.
  • An arrangement with a Hall probe for measuring the magnetic flux requires constructional modifications to the magnet system, as a result of which the use of a standard magnet system is ruled out.
  • the invention has for its object to improve a switching device of the type mentioned in that the Measurement of the magnetic flux is made possible using a conventional magnet system.
  • the object is achieved in that a measuring coil is arranged on one leg of the yoke as a means for measuring the magnetic flux.
  • the measuring coil is advantageously connected to an evaluation unit which integrates the voltage induced in the measuring coil. Since the control of constant magnetic flux is limited to the closing process in the contactor, minor errors in the integration can be neglected.
  • the integration can be implemented in an analog manner or in a microprocessor.
  • a particularly advantageous embodiment is provided when the measuring coil is integrated in the form of conductor tracks on a circuit board. This makes it possible to dispense with additional connections of the evaluation unit if this is also integrated on the circuit board.
  • FIG. 1 shows a magnet system with an additional measuring coil for measuring the magnetic flux
  • FIG. 2 shows a magnet system according to FIG. 1 with an electronic circuit connected to the measuring coil and
  • FIG. 3 shows a magnet system according to FIG. 1 with a measuring coil integrated on a printed circuit board.
  • FIG. 1 shows the magnet system of a switching device according to the invention, for example an electronically controlled contactor or a relay, shown.
  • the magnet system according to FIG. 1 is in
  • E-shape with two outer legs and a middle leg on yoke 1 and armature 2, wherein a coil 4 is arranged to excite the magnet system around the middle leg 3 of yoke 1, which is acted upon by the coil voltage U Spu i e .
  • the coil voltage Us pu i e is regulated to a constant magnetic flux in order to achieve a smooth closing process with little contact bounce. In this way, a longer service life of the contactor drive and in particular of the contact pieces can be achieved.
  • the measurement of the magnetic flux required in this method takes place with an additional measuring coil 5, which is arranged around one of the legs 6 of the yoke 1.
  • An evaluation unit 7 is connected to the measuring coil 5 and integrates the voltage U Me ß induced in the measuring coil 5.
  • the coil voltage U Spu i e is regulated in a manner known per se and not described in more detail to a practically constant magnetic flux.
  • the evaluation unit and control device can be implemented in terms of circuitry on a printed circuit board 8. It is particularly advantageous if, in addition to this circuit 9, a coil 5 in the form of spiral current paths 10 is integrated on the printed circuit board 8 according to FIG. 3, which serves as a measuring coil for measuring the magnetic flux and is in turn placed around a leg 6 of the yoke 1 , In this solution, the measuring coil 5 is already connected to the electrical circuit 9 without additional connections, which reduces the time and cost involved in the manufacture of the magnet system.

Abstract

The inventive switching device has a magnet system comprising a yoke (1), around whose limb (6) a measuring coil (5) is situated. The voltage induced in said measuring coil (5) is integrated in order to determine the magnetic flux. The measuring coil (5) advantageously consists of spiral-shaped conducting paths (10) on a printing circuit board (8).

Description

Beschreibungdescription
Elektromagnetisches SchaltgerätElectromagnetic switching device
Die Erfindung betrifft ein Schaltgerät, insbesondere Relais oder Schütz mit einem Magnetsystem, das ein Joch, einen Anker, eine Spule zur Erregung des Magnetsystems und Mittel zur Messung des magnetischen Flusses umfaßt.The invention relates to a switching device, in particular a relay or contactor with a magnet system, which comprises a yoke, an armature, a coil for exciting the magnet system and means for measuring the magnetic flux.
Ein gattungsgemäßes Schaltgerät ist aus der DE 197 00 521 C2 bekannt. Das Magnetsystem ist hier als U-Kern mit einem Joch, einem Anker und einem Spulenkörper mit Spule ausgeführt. Auf dem Spulenkörper ist in einem Zwangsluftspalt ein Magnetfeldsensor zur Erfassung des magnetischen Flusses gelagert. Die WO 82/02 115 offenbart eine elektronische Schaltungsanordnung zur Ansteuerung eines elektromagnetischen Bauelements, insbesondere einer Drossel oder einer Spule eines einen magnetischen Kreis mit Spule, Joch und Anker aufweisenden elektromagnetischen Schaltgeräts. Der Strom durch das Bauelement wird so geregelt, daß unabhängig von der Versorgungsspannung der magnetische Fluß konstant bleibt. Für einen großen Spannungsbereich kann beispielsweise das gleiche Schaltgerät eingesetzt werden, wobei stets ein sicheres Anziehen des Ankers gewährleistet ist. Zur Regelung des Induktions-Istwertes ist hier eine Hallsonde eingesetzt.A generic switching device is known from DE 197 00 521 C2. The magnet system is designed as a U-core with a yoke, an armature and a coil body with a coil. A magnetic field sensor for detecting the magnetic flux is mounted on the coil former in a forced air gap. WO 82/02 115 discloses an electronic circuit arrangement for controlling an electromagnetic component, in particular a choke or a coil of an electromagnetic switching device having a magnetic circuit with a coil, yoke and armature. The current through the component is regulated so that the magnetic flux remains constant regardless of the supply voltage. For example, the same switching device can be used for a large voltage range, with the armature always being securely tightened. A Hall probe is used to control the actual induction value.
Die Regelung der Spulenspannung auf konstanten magnetischen Fluß beim elektronisch gesteuerten Schütz ermöglicht einen sanften Schließvorgang, der aufgrund des geringeren Kontakt- trennens eine längere Lebensdauer des Schützantriebes und der Schaltstücke zur Folge hat. Eine Anordnung mit Hallsonde zur Messung des magnetischen Flusses erfordert konstruktionstechnische Modifikationen am Magnetsystem, wodurch der Einsatz eines Standard-Magnetsystems ausscheidet.The regulation of the coil voltage to a constant magnetic flux in the electronically controlled contactor enables a smooth closing process, which results in a longer service life of the contactor drive and the switching elements due to the lower contact separation. An arrangement with a Hall probe for measuring the magnetic flux requires constructional modifications to the magnet system, as a result of which the use of a standard magnet system is ruled out.
Daher liegt der Erfindung die Aufgabe zugrunde, ein Schaltgerät der oben genannten Art dahingehend zu verbessern, daß die Messung des magnetischen Flusses unter Anwendung eines konventionellen MagnetSystems ermöglicht wird.Therefore, the invention has for its object to improve a switching device of the type mentioned in that the Measurement of the magnetic flux is made possible using a conventional magnet system.
Die Aufgabe wird dadurch gelöst, daß als Mittel zur Messung des magnetischen Flusses eine Meßspule auf einem Schenkel des Jochs angeordnet ist.The object is achieved in that a measuring coil is arranged on one leg of the yoke as a means for measuring the magnetic flux.
Vorteilhafte Weiterbildung der Erfindung sind den Unteransprüchen 2 bis 4 zu entnehmen.Advantageous developments of the invention can be found in subclaims 2 to 4.
Gemäß Anspruch 2 ist die Meßspule vorteilhafterweise mit einer Auswerteeinheit verbunden, die die in der Meßspule induzierte Spannung integriert. Da die Regelung auf konstanten magnetischen Fluß sich auf den Schließvorgang im Schütz be- schränkt, können geringfügige Fehler bei der Integration vernachlässigt werden. Die Integration kann auf analoge Weise oder in einem Mikroprozessor realisiert werden.According to claim 2, the measuring coil is advantageously connected to an evaluation unit which integrates the voltage induced in the measuring coil. Since the control of constant magnetic flux is limited to the closing process in the contactor, minor errors in the integration can be neglected. The integration can be implemented in an analog manner or in a microprocessor.
Eine besonders vorteilhafte Ausführungsform ist gegeben, wenn die Meßspule in Form von Leiterbahnen auf einer Leiterplatte integriert ist. Dies ermöglicht auf zusätzliche Anschlüsse der Auswerteeinheit zu verzichten, wenn diese ebenfalls auf der Leiterplatte integriert ist.A particularly advantageous embodiment is provided when the measuring coil is integrated in the form of conductor tracks on a circuit board. This makes it possible to dispense with additional connections of the evaluation unit if this is also integrated on the circuit board.
Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand einer Zeichnung näher erläutert. Es zeigen:An embodiment of the invention is explained below with reference to a drawing. Show it:
FIG 1 ein Magnetsystem mit zusätzlicher Meßspule zur Messung des magnetischen Flusses, FIG 2 ein Magnetsystem gemäß FIG 1 mit einer an die Meßspule angeschlossenen elektronischen Schaltung und1 shows a magnet system with an additional measuring coil for measuring the magnetic flux, FIG. 2 shows a magnet system according to FIG. 1 with an electronic circuit connected to the measuring coil and
FIG 3 ein Magnetsystem gemäß FIG 1 mit auf einer Leiterplatte integrierter Meßspule.3 shows a magnet system according to FIG. 1 with a measuring coil integrated on a printed circuit board.
In FIG 1 ist das Magnetsystem eines erfindungsgemäßen Schaltgeräts, z.B. eines elektronisch gesteuerten Schützes oder ei- nes Relais, dargestellt. Das Magnetsystem gemäß FIG 1 ist in1 shows the magnet system of a switching device according to the invention, for example an electronically controlled contactor or a relay, shown. The magnet system according to FIG. 1 is in
E-Form mit zwei Außenschenkeln und einem Mittelschenkel an Joch 1 und Anker 2 ausgeführt, wobei zur Erregung des Magnetsystems um den Mittelschenkel 3 des Jochs 1 eine Spule 4 an- geordnet ist, die mit der Spulenspannung USpuie beaufschlagt wird.E-shape with two outer legs and a middle leg on yoke 1 and armature 2, wherein a coil 4 is arranged to excite the magnet system around the middle leg 3 of yoke 1, which is acted upon by the coil voltage U Spu i e .
Beim elektronisch gesteuerten Schütz wird die Spulenspannung Uspuie auf konstant magnetischen Fluß geregelt, um einen sanf- ten Schließvorgang mit geringem Kontaktprellen zu erreichen. Hierdurch ist eine längere Lebensdauer des Schützantriebs und insbesondere der Schaltstücke erreichbar. Die bei diesem Verfahren erforderliche Messung des magnetischen Flusses erfolgt mit einer zusätzlichen Meßspule 5, die um einen der Schenkel 6 des Jochs 1 angeordnet ist. Der Vorteil dieser Anordnung besteht darin, daß im Unterschied zur Flußmessung mit einer Hallsonde am üblichen Aufbau des Magnetsystems keine Veränderungen vorgenommen werden müssen. An die Meßspule 5 ist eine Auswerteeinheit 7 angeschlossen, die die in der Meßspule 5 induzierte Spannung UMeß integriert. Hiervon ausgehend wird in an sich bekannter und nicht näher beschriebener Weise die Spulenspannung USpuie auf praktisch konstanten magnetischen Fluß geregelt. Die Auswerteeinheit und Regeleinrichtung kann gemäß FIG 2 schaltungstechnisch auf einer Leiterplatte 8 realisiert sein. Besonders vorteilhaft ist es, wenn neben dieser Schaltung 9 auf der Leiterplatte 8 gemäß FIG 3 eine Spule 5 in Form von spiralförmigen Strombahnen 10 integriert ist, die als Meßspule zur Messung des magnetischen Flusses dient und hierzu wiederum um einen Schenkel 6 des Jochs 1 gelegt ist. Bei dieser Lösung ist die Meßspule 5 ohne zusätzliche Anschlüsse bereits mit der elektrischen Schaltung 9 verbunden, was den Zeit- und Kostenaufwand bei der Fertigung des Magnetsystems reduziert. In the case of the electronically controlled contactor, the coil voltage Us pu i e is regulated to a constant magnetic flux in order to achieve a smooth closing process with little contact bounce. In this way, a longer service life of the contactor drive and in particular of the contact pieces can be achieved. The measurement of the magnetic flux required in this method takes place with an additional measuring coil 5, which is arranged around one of the legs 6 of the yoke 1. The advantage of this arrangement is that, unlike flow measurement with a Hall probe, no changes need to be made to the usual structure of the magnet system. An evaluation unit 7 is connected to the measuring coil 5 and integrates the voltage U Me ß induced in the measuring coil 5. Proceeding from this, the coil voltage U Spu i e is regulated in a manner known per se and not described in more detail to a practically constant magnetic flux. According to FIG. 2, the evaluation unit and control device can be implemented in terms of circuitry on a printed circuit board 8. It is particularly advantageous if, in addition to this circuit 9, a coil 5 in the form of spiral current paths 10 is integrated on the printed circuit board 8 according to FIG. 3, which serves as a measuring coil for measuring the magnetic flux and is in turn placed around a leg 6 of the yoke 1 , In this solution, the measuring coil 5 is already connected to the electrical circuit 9 without additional connections, which reduces the time and cost involved in the manufacture of the magnet system.

Claims

Patentansprüche claims
1. Schaltgerät, insbesondere Relais oder Schütz, mit einem Magnetsystem, das ein Joch (1), einen Anker (2), eine Spule1. Switching device, in particular relay or contactor, with a magnet system, the yoke (1), an armature (2), a coil
(5) zur Erregung des Magnetsystems und Mittel zur Messung des magnetischen Flusses umfaßt, dadurch gekennzeichnet, daß als Mittel zur Messung des magnetischen Flusses eine Meßspule (5) auf einem Schenkel (6) des Jochs (1) angeordnet ist.(5) for excitation of the magnet system and means for measuring the magnetic flux, characterized in that a measuring coil (5) is arranged on one leg (6) of the yoke (1) as means for measuring the magnetic flux.
2. Schaltgerät nach Anspruch 1, dadurch gekennzeichnet, daß die Meßspule (5) mit einer Auswerteeinheit (7) verbunden ist, die die in der Meßspule (5) induzierte Spannung UMeß integriert.2. Switching device according to claim 1, characterized in that the measuring coil (5) is connected to an evaluation unit (7) which integrates the voltage induced in the measuring coil (5) measuring voltage U.
3. Schaltgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Meßspule (5) in Form von Leiterbahnen (10) auf einer Leiterplatte (5) integriert ist.3. Switching device according to claim 1 or 2, characterized in that the measuring coil (5) in the form of conductor tracks (10) is integrated on a circuit board (5).
4. Schaltgerät nach Anspruch 3, dadurch gekennzeichnet, daß die Auswerteeinheit (7) auf der Leiterplatte (8) integriert ist. 4. Switching device according to claim 3, characterized in that the evaluation unit (7) on the circuit board (8) is integrated.
PCT/DE2000/004058 1999-11-25 2000-11-16 Electromagnetic switching device WO2001039228A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19956853.7 1999-11-25
DE19956853 1999-11-25

Publications (1)

Publication Number Publication Date
WO2001039228A1 true WO2001039228A1 (en) 2001-05-31

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PCT/DE2000/004058 WO2001039228A1 (en) 1999-11-25 2000-11-16 Electromagnetic switching device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012038221A1 (en) * 2010-09-22 2012-03-29 Siemens Aktiengesellschaft Switching device and method for controlling a switching device
DE102012112692A1 (en) * 2012-12-20 2014-06-26 Eaton Electrical Ip Gmbh & Co. Kg Device and method for operating an electromagnetic switching device drive

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19535211A1 (en) * 1995-09-22 1997-03-27 Univ Dresden Tech Regulation circuit for electromagnetic switchgear drive
GB2322982A (en) * 1997-03-06 1998-09-09 Eaton Corp Isolated high frequency power supply for an indicator light

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19535211A1 (en) * 1995-09-22 1997-03-27 Univ Dresden Tech Regulation circuit for electromagnetic switchgear drive
GB2322982A (en) * 1997-03-06 1998-09-09 Eaton Corp Isolated high frequency power supply for an indicator light

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012038221A1 (en) * 2010-09-22 2012-03-29 Siemens Aktiengesellschaft Switching device and method for controlling a switching device
DE102012112692A1 (en) * 2012-12-20 2014-06-26 Eaton Electrical Ip Gmbh & Co. Kg Device and method for operating an electromagnetic switching device drive

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