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EP0384206B1 - Electro-aimant avec plongeur - Google Patents

Electro-aimant avec plongeur Download PDF

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Publication number
EP0384206B1
EP0384206B1 EP19900102279 EP90102279A EP0384206B1 EP 0384206 B1 EP0384206 B1 EP 0384206B1 EP 19900102279 EP19900102279 EP 19900102279 EP 90102279 A EP90102279 A EP 90102279A EP 0384206 B1 EP0384206 B1 EP 0384206B1
Authority
EP
European Patent Office
Prior art keywords
pole piece
annular gap
plunger
transmitter element
electromagnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19900102279
Other languages
German (de)
English (en)
Other versions
EP0384206A1 (fr
Inventor
Heinrich Dick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT90102279T priority Critical patent/ATE89098T1/de
Publication of EP0384206A1 publication Critical patent/EP0384206A1/fr
Application granted granted Critical
Publication of EP0384206B1 publication Critical patent/EP0384206B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86622—Motor-operated

Definitions

  • the invention relates to an electromagnet with a plunger, in particular with the features specified in the preamble of claim 1.
  • the control device of the known as well as of the electromagnet according to the invention is used to automatically adapt the magnetic force to a desired value. This should be independent of the route, i.e. from the position of the submersible anchor in the anchor stroke distance.
  • the control device is supplied with a measured value for the instantaneous magnetic induction, the measurement being carried out by the transmitter element mentioned in the preamble of claim 1.
  • the measured value and the target value are compared with one another in the control device; If there is a discrepancy between the measured value and the target value, the control device automatically triggers a change in the excitation current such that the measured value approaches the target value.
  • the transmitter element is arranged in the working air gap, ie between the movable plunger and the fixed pole piece.
  • the advantage of this arrangement is that the active surface of the transmitter element (which is preferably designed as a Hall generator) is penetrated perpendicularly by the magnetic flux.
  • the active surface of the transmitter element is the plane in which the charge carriers move, and this plane lies parallel to the working air gap.
  • this known arrangement of the transmitter element offers optimal conditions for the aforementioned control device to be able to fulfill the purpose described above.
  • a disadvantage of the known arrangement of the transmitter element is, however, that it is located at a location where it is mechanically relatively easily vulnerable and where, under certain circumstances, it is exposed to an aggressive liquid which penetrates from the pressure control valve.
  • the transmitter element is arranged laterally outside of the interior enveloped by the magnet coil, in the area of that end of the magnet coil from which the plunger armature extends into the interior of the magnet coil extends into it.
  • the sensor element is located in an area that is sealed against the ingress of liquid.
  • This arrangement of the transmitter element has the disadvantage, however, that not only the useful magnetic flux relevant for setting the magnetic force is measured, but also a so-called stray flux, the size of which depends on the current width of the working air gap.
  • the leakage flux mentioned decreases with a reduction in the working air gap. If the control device now comes into action, there is therefore an undesirable dependence of the magnetic flux (and thus the magnetic force) on the width of the working air gap between the plunger and the pole piece.
  • the invention is therefore based on the object to improve the electromagnet known from DE-PS 27 20 877 in such a way that the transmitter element can be accommodated in a safer place than before, without losing the previous advantage that the magnetic flux (and thereby the magnetic force) can be measured with high accuracy.
  • stray flux falsifies the measurement result.
  • claim 1 states that an annular gap divides the pole piece into two, essentially coaxially nested and magnetically insulated pole piece parts.
  • the transmitter element (compared with DE-OS 36 05 216) is no longer in the area of that end of the solenoid coil from which the plunger armature extends into the interior of the solenoid coil. Instead, the transmitter element is now more in the area of the opposite end of the magnet coil, that is, where the fixed pole piece extends into the interior of the magnet coil. All of these measures have the effect that the (preferably designed as a Hall generator) transmitter element is penetrated exclusively (or almost exclusively) by the useful magnetic flux, ie by the magnetic flux passing through the plunger. The transmitter element is at least largely free of disturbing stray flux. It is at the same time - deviating from DE-PS 27 20 877 - arranged in an extremely well protected place. The risk of injury to the transmitter element is now almost zero.
  • the arrangement according to the invention also has the advantage that the magnetic resistance of the annular gap (which receives the transmitter element) remains relatively small because of the rather large lateral surface of the annular gap.
  • the donor element can now be protected against liquids, in particular against aggressive liquids.
  • the annular gap on the end face of the pole piece facing the plunger anchor is closed with a non-magnetic material (claim 2). This is particularly important when the electromagnet according to the invention is used to control a hydraulic pressure regulating valve and is thus attached directly to it.
  • the annular gap can be shaped differently, e.g. conical and / or with a paragraph. However, the cylinder jacket shape is preferred (claim 3) in order to simplify production.
  • the clear width of the annular gap can vary over the length of the electromagnet, but is preferably made constant.
  • the effect described above namely that the flux passing through the plunger is measured on the transmitter element, can be further improved by making the magnetic resistance in the fixed pole piece at least approximately the same on both sides of the annular gap, provided that the working air gap (i.e. the distance between the immersion anchor and the pole piece) assumes the smallest possible value.
  • This adjustment of the magnetic resistance in the two areas of the pole piece can be achieved in a particularly simple manner by providing an annular recess in the plunger on the end face facing the fixed pole piece (claim 4). Their depth can be determined by experiment or calculation. It can be achieved that the magnetic force is completely independent of the path. Or, if desired, a certain path dependency of the magnetic force can be achieved.
  • Said control device and the associated electronic components are preferably - as is known from DE-PS 27 20 877 - arranged between the outer end face of the pole piece and the device to be controlled (e.g. pressure control valve) in a so-called electronics room. It is expedient here if the annular gap - at least where the transmitter element is arranged - is open to the electronics compartment (claim 5). This greatly facilitates the assembly of the transmitter element and the associated electrical lines.
  • the electrically controlled pressure control valve shown is used to convert an electrical variable, a command variable, into an analog hydraulic variable. So it is an electro-hydraulic signal converter.
  • the device comprises a valve housing (10) with a central bore (11) for a valve piston (12), furthermore with inlet (13), outlet (14), outlet (15) and leakage oil outlet (16).
  • the pressure line (8) of a pump (7) can be connected to the input (13) and a line (6) to the output (14) which supplies the regulated pressure, i.e. the hydraulic output quantity, to a consumer ( 5) feeds.
  • the outlet (14) is connected to the one end face (18) of the piston (12) via bores (17).
  • an actuating rod (20) which forms the actuator of an electromagnet, generally designated (9).
  • the latter consists of an outer pole piece part (23) and an inner pole piece part (43).
  • Both pole piece parts (23 and 43) are preferably rotationally symmetrical and are arranged coaxially with one another and with the plunger armature (26) and the solenoid coil (22).
  • a preferably cylindrical jacket-shaped annular gap (44) in which there is a sensor element (31) designed as a Hall generator.
  • the annular gap is largely filled with a magnetically non-conductive material (45).
  • One uses z. B. brass, silver solder or the like. Mechanically, the two pole piece parts (23, 43) thus form a unit. Only in the area of the Hall generator (31) is the annular gap (44) open at the right end (in the drawing).
  • Said adjusting rod (20) is screwed into the movable plunger anchor (26).
  • the plunger armature (26) slides in a bushing (28).
  • a circuit board (30) for a control device is attached to the pole piece (23, 43) in the intermediate space ("electronics space” 39) located between the pole piece (23, 43) and the valve housing (10).
  • the control device serves to keep the magnetic force constant at a value which can be predetermined by the reference variable (setpoint), the magnetic force (or “armature tightening force”) being independent of the position of the submersible armature (26) in the armature stroke.
  • the controlled variable serves the magnetic induction, which is measured by the Hall generator (31) mentioned.
  • the Hall generator (31) arranged in the annular gap (44) is connected to the printed circuit board (30) via four lines, two measuring lines and two control current lines. Of these four lines, only one is indicated at (32).
  • the armature tightening force is adjusted by changing the excitation current flowing through the line (33) through the magnet coil (22).
  • the electronic components of the control device arranged on the printed circuit board (30) are shown in the drawing at e.g. 34, 35 and 36 indicated.
  • the connecting lines leading from the plug connection (25) to the printed circuit board (30) are identified by (37).
  • the magnetic coil (22), the pole piece (23, 43) and the printed circuit board (30) are fixed in the axial direction by a locking ring (38).
  • the circuit board (30) is a circular disk.
  • the adjusting rod (20) and a sleeve (27), which projects sealingly into the inner pole piece (43), extends through the center thereof.
  • the sleeve (27) is connected to an intermediate disk (27a) which rests between the valve housing (10) and the magnet housing (21).
  • the annular gap (44) and the electronics chamber (39) are sealed off from the valve interior.
  • the electronics room (39) can be filled with a plastic compound.
  • the plunger anchor (26) has a shoulder (46) with the depth (t) on its end face facing the pole piece (23, 43).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electromagnets (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Cookers (AREA)

Claims (5)

  1. Electro-aimant (9) comprenant une armature mobile (26), du type plongeur, et une bobine fixe (22), essentiellement annulaire, et comportant les particularités suivantes :
    a) une pièce polaire fixe (23) s'étend de l'une des faces frontales de la bobine (22) jusque dans la cavité de cette dernière,
    b) l'armature-plongeur (26), mobile selon la direction axiale, s'étend de l'autre face frontale de la bobine (22) jusque dans la cavité de cette dernière,
    c) un dispositif servant à régler la force d'attraction de l'armature mobile comprend un élément émetteur (31) qui mesure le flux magnétique,
    caractérisé par les autres particularités suivantes :
    d) une fente annulaire (44), disposée essentiellement suivant le même axe que l'électro-aimant (9), s'étend à travers toute la pièce polaire (23, 43), de sorte que cette dernière est divisée en deux parties de pièce polaire isolées magnétiquement l'une de l'autre,
    e) l'élément émetteur (31) est disposé dans la fente annulaire (44) située entre les deux parties de pièce polaire (23, 43).
  2. Electro-aimant suivant la revendication 1, caractérisé en ce qu'à son extrémité tournée vers l'armature mobile (26) du type plongeur, la fente annulaire (44) est fermée par un matériau (45) non conducteur sur le plan magnétique.
  3. Electro-aimant suivant la revendication 1 ou 2, caractérisé en ce que la fente annulaire (44) a la forme d'une enveloppe cylindrique.
  4. Electro-aimant suivant l'une des revendications 1 à 3, caractérisé en ce que, sur sa face frontale tournée vers la pièce polaire fixe (23/43), l'armature mobile (26) du type plongeur comporte un évidement annulaire en forme d'épaulement (46), la profondeur (t) de l'évidement ayant une valeur telle que la résistance magnétique dans la pièce polaire fixe (23/43) est au moins approximativement identique de part et d'autre de la fente annulaire (44), dans la mesure où l'entrefer de travail prend la valeur la plus faible possible.
  5. Electro-aimant suivant l'une des revendications 1 à 4, dans lequel ledit dispositif de réglage est disposé entre la face frontale extérieure de la pièce polaire (23, 43) et le dispositif à commander (10 à 16), dans une chambre d'électronique (39), caractérisé en ce que la fente annulaire (44) est ouverte, au moins dans la zone de l'élément émetteur (31), vers cette chambre d'électronique (39).
EP19900102279 1989-02-18 1990-02-06 Electro-aimant avec plongeur Expired - Lifetime EP0384206B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90102279T ATE89098T1 (de) 1989-02-18 1990-02-06 Elektromagnet mit einem tauchanker.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905023 1989-02-18
DE19893905023 DE3905023A1 (de) 1989-02-18 1989-02-18 Elektromagnet mit einem tauchanker

Publications (2)

Publication Number Publication Date
EP0384206A1 EP0384206A1 (fr) 1990-08-29
EP0384206B1 true EP0384206B1 (fr) 1993-05-05

Family

ID=6374423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900102279 Expired - Lifetime EP0384206B1 (fr) 1989-02-18 1990-02-06 Electro-aimant avec plongeur

Country Status (5)

Country Link
US (1) US5006901A (fr)
EP (1) EP0384206B1 (fr)
JP (1) JPH02277202A (fr)
AT (1) ATE89098T1 (fr)
DE (2) DE3905023A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4235508A1 (de) * 1992-08-28 1994-03-03 Oerlikon Knorr Eisenbahntech Analog-Stellmagnet, insbesondere für Analog-Magnetventile
DE19643788A1 (de) * 1996-10-30 1998-05-07 Voith Turbo Kg Elektrohydraulische Druckstellvorrichtung und Verfahren zur Umwandlung elektrischer Stellsignale in hydraulischen Stelldruck
US5960776A (en) * 1996-11-21 1999-10-05 Siemens Canada Limited Exhaust gas recirculation valve having a centered solenoid assembly and floating valve mechanism
US5906268A (en) * 1997-02-24 1999-05-25 Siemens Electrocom L.P. Sensor roller
DE19716540A1 (de) * 1997-04-19 1998-10-22 Bosch Gmbh Robert Elektromagnet zur Betätigung des Stellglieds eines Ventils
DE19804225C1 (de) * 1998-02-04 1999-05-06 Telefunken Microelectron Elektromagnetischer Aktuator
US6119960A (en) * 1998-05-07 2000-09-19 Caterpillar Inc. Solenoid actuated valve and fuel injector using same
DE19826579B4 (de) * 1998-06-15 2013-02-21 Hydraulik-Ring Gmbh Magnetventil
FR2791487B1 (fr) * 1999-03-26 2004-09-03 Moving Magnet Tech Procede pour la determination de la position d'un organe mobile dans au moins un entrefer principal d'un actionneur electromagnetique
DE19937969A1 (de) * 1999-08-11 2001-02-15 Hydraulik Ring Gmbh Hydraulisches Ventil, insbesondere verstellbares Druckregelventil
CN1234135C (zh) * 2001-01-18 2005-12-28 株式会社日立制作所 电磁铁和使用该电磁铁的开关装置的操作机构
US6443422B1 (en) * 2001-06-08 2002-09-03 Eaton Corporation Apparatus and method for adjusting an actuator on a real-time basis
US20040246649A1 (en) * 2003-06-03 2004-12-09 Mks Instruments, Inc. Flow control valve with magnetic field sensor
US6720853B1 (en) * 2003-07-15 2004-04-13 Wabash Magnetics, Llc Electrically operated solenoid having an adjustable actuator pin length
ATE373788T1 (de) * 2003-10-28 2007-10-15 Zahnradfabrik Friedrichshafen Ventilgehäuse mit einer integrierten schaltungsanordnung
DE102005004080A1 (de) * 2005-01-28 2006-08-03 Robert Bosch Gmbh Elektromagnetische Druckregelventileinrichtung mit integriertem Drucksensor
DE102015104010B4 (de) 2014-03-20 2022-05-05 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Elektromagnetisches kraftstoffeinspritzventil mit integriertem flusssensor
DE102014226227A1 (de) 2014-12-17 2016-06-23 Robert Bosch Gmbh Verfahren zur Bestimmung einer Schaltstellung eines Schützes, Steuergerät und Batteriesystem
DE102015116464A1 (de) * 2015-09-29 2017-03-30 Voith Patent Gmbh Elektromagnetischer Stellantrieb zur Ausführung einer linearen Bewegung
AT522973B1 (de) * 2019-12-18 2021-04-15 Hoerbiger Wien Gmbh Elektromagnetischer Aktuator

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004258A (en) * 1974-11-20 1977-01-18 Valcor Engineering Corporation Position indicating pulse latching solenoid
US4056816A (en) * 1976-10-05 1977-11-01 Guim R Light emitting diode blown circuit breaker indicator
DE2720877C3 (de) * 1977-05-10 1979-11-08 Voith Getriebe Kg, 7920 Heidenheim Elektromagnet
DE2930995C3 (de) * 1979-07-31 1982-02-04 Binder Magnete GmbH, 7730 Villingen-Schwenningen Elektromagnetischer Hubmagnet mit Hublagenerkennung
DE3123525C2 (de) * 1981-06-13 1985-10-31 Binder Magnete GmbH, 7730 Villingen-Schwenningen Elektrisch betätigter Hubmagnet mit Hublageerkennung
DE3147559A1 (de) * 1981-12-01 1983-06-09 Mannesmann Rexroth GmbH, 8770 Lohr Magnetantrieb fuer ventile
US4659969A (en) * 1984-08-09 1987-04-21 Synektron Corporation Variable reluctance actuator having position sensing and control
DE3605216C2 (de) * 1986-02-19 1996-05-15 Bosch Gmbh Robert Tauchanker-Elektromagnet

Also Published As

Publication number Publication date
JPH02277202A (ja) 1990-11-13
ATE89098T1 (de) 1993-05-15
DE3905023C2 (fr) 1991-02-14
JPH0580124B2 (fr) 1993-11-08
EP0384206A1 (fr) 1990-08-29
DE3905023A1 (de) 1990-08-30
US5006901A (en) 1991-04-09
DE59001330D1 (de) 1993-06-09

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