EP0899755A1 - Dispositif de détection de la position d'une armature mobile électromagnétique - Google Patents

Dispositif de détection de la position d'une armature mobile électromagnétique Download PDF

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Publication number
EP0899755A1
EP0899755A1 EP98105164A EP98105164A EP0899755A1 EP 0899755 A1 EP0899755 A1 EP 0899755A1 EP 98105164 A EP98105164 A EP 98105164A EP 98105164 A EP98105164 A EP 98105164A EP 0899755 A1 EP0899755 A1 EP 0899755A1
Authority
EP
European Patent Office
Prior art keywords
armature
sensor arrangement
housing
sensor
arrangement according
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.)
Withdrawn
Application number
EP98105164A
Other languages
German (de)
English (en)
Inventor
Roland Schempp
Joachim Zumbraegel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0899755A1 publication Critical patent/EP0899755A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a sensor arrangement for detection the position of an electromagnetically moved armature after the Genus of the main claim.
  • a proximity switch attached to the outside of the housing of a directional valve can be the capacitive or inductive the movement of the Evaluates the magnet armature. If the magnet armature or the valve piston actuated by this approaches the switch, so this emits a corresponding switching signal. More precise information about the location of the moving parts in the known arrangements, however not to be recorded.
  • the sensor arrangement for detecting the position of an electromagnetic moving anchor, in the after the aforementioned Genus with an excitation coil for generating a Magnetic field an anchor is movable and at least a sensor element for the detection of magnetic quantities depending on the anchor position on the outside of one Housing is attached is with the characteristics of the mark of the main claim further developed according to the invention.
  • the at least one sensor element is advantageous a field probe in an area outside on A magnetic stray flux is attached to the housing occurs from the armature position and the excitation current is dependent.
  • electromagnetically moving anchors the excitation coil and the iron parts, especially the moving armature and the housing, usually constructed so that the greatest possible useful flow through the anchor flows.
  • the part of the magnetic flux through the Air that occurs alongside the intended path is the Litter flux, depending on the structure and material of the arrangement has a share of approx. 10 to 30% of the total flow.
  • the fact that the leakage flux is used depending on the excitation, the anchor position and the Position of further magnetically conductive parts in the arrangement is. For example, whether a valve spool electrical switching command is followed in the arrangement or not, can thus be determined by the size of the magnetic Leakage flux at a specific point on the housing the electromagnet easily.
  • the anchor position can prevent leakage for example by a factor of 6 between the activated Change switch position and zero position.
  • a particularly sensitive Sensor element is advantageously a Field probe constructed with a Hall element.
  • off state of the excitation coil the residual magnetism to a still detectable leakage flow receive.
  • a detection signal that can be easily evaluated Being able to win in any anchor position flows according to a preferred embodiment in the excitation coil even in the rest position, a residual current that corresponds to a predetermined easily measurable leakage flux without actuating the anchor generated.
  • This residual current must therefore remain so low that the anchor is in the switched off state moved to the zero position and remains there; he should approx Do not exceed 1/10 of the nominal value of the current.
  • the measuring points at which the sensor elements on the housing attached to obtain a sufficiently large signal swing can be used for different anchor positions be optimized.
  • To a big enough one Signal stroke for both the on position and for To win the switch-off position of the armature are advantageous Way two sensor elements on different Positions, each for the different switching positions optimized, arranged on the housing of the electromagnet.
  • the sensor arrangement according to the invention can be used both in the Automotive technology as well as in industrial mechanical engineering are used, the driven by the movable anchor Component, for example, a valve spool Valve for a hydraulic or pneumatic arrangement is.
  • FIG. 1 is a schematic diagram of an electromagnetically operated valve spool shows.
  • valve 1 for a hydraulic system, shown in a motor vehicle, for example, in which a valve spool 2 with an armature 3 of an electromagnet 4 operable, or in different valve positions is movable.
  • the armature 3 and the valve slide 2 are here about a mechanical arrangement with a spring 5 coupled.
  • the electromagnet 4 has an excitation coil, which cannot be seen here on the inside of the case, which has a Cable connection 6 is supplied with an excitation current.
  • the excitation coil actuates the armature 3 with its useful flow, the iron parts of the armature 3 and the housing flows through. Outside the housing occurs rotationally symmetrical between the ends of the excitation coil as well Stray flux 7, whose field lines at the ends of the excitation coil, especially at the junction between the solenoid housing and the valve housing exit or enter.
  • a field probe 8 At the junction between the electromagnet 4 and the valve 1 is a field probe 8, with a Hall element 9 present, the one by the size of the Stray flux conditional measurement signal generated, which evaluates can be and thus a detection of the position of the Armature 3 and thus also the valve slide 2 enables.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Magnetically Actuated Valves (AREA)
EP98105164A 1997-08-23 1998-03-21 Dispositif de détection de la position d'une armature mobile électromagnétique Withdrawn EP0899755A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997136773 DE19736773A1 (de) 1997-08-23 1997-08-23 Sensoranordnung zur Erfassung der Lage eines elektromagnetisch bewegten Ankers
DE19736773 1997-08-23

Publications (1)

Publication Number Publication Date
EP0899755A1 true EP0899755A1 (fr) 1999-03-03

Family

ID=7839978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105164A Withdrawn EP0899755A1 (fr) 1997-08-23 1998-03-21 Dispositif de détection de la position d'une armature mobile électromagnétique

Country Status (2)

Country Link
EP (1) EP0899755A1 (fr)
DE (1) DE19736773A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9428164B2 (en) 2013-02-28 2016-08-30 Bendix Commercial Vehicle Systems Llc Valve assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1651485B1 (fr) * 2003-07-31 2007-11-28 Continental Teves AG & Co. oHG Procede et dispositif pour produire et/ou ajuster un actionneur pouvant etre commande de maniere electromagnetique
CN101445100B (zh) * 2003-07-31 2013-11-13 大陆-特韦斯贸易合伙股份公司及两合公司 确定调节设备的致动电流的方法
DE102011076363B4 (de) * 2011-05-24 2015-08-20 Continental Automotive Gmbh Verfahren und Vorrichtung zur Bestimmung des Öffnungsverhaltens eines Kraftstoffinjektors für eine Brennkraftmaschine
DE102015213206A1 (de) 2015-07-15 2017-01-19 Robert Bosch Gmbh Verfahren und Schaltungsanordnung zum Ermitteln einer Position eines beweglichen Ankers eines elektromagnetischen Aktors

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605216A1 (de) * 1986-02-19 1987-08-20 Bosch Gmbh Robert Tauchanker-elektromagnet
JPH03150809A (ja) * 1989-11-07 1991-06-27 Ckd Corp 電磁ソレノイド動作状態検出装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1375070A (fr) * 1963-07-05 1964-10-16 Csf Appareils électriques tournants à effet hall
US4107604A (en) * 1976-12-01 1978-08-15 Compunetics, Incorporated Hall effect displacement transducer using a bar magnet parallel to the plane of the Hall device
DE3322928C2 (de) * 1982-07-02 1986-03-27 Deutsche Forschungs- Und Versuchsanstalt Fuer Luft- Und Raumfahrt E.V., 5000 Koeln Meßumformer
SE445585B (sv) * 1985-02-28 1986-06-30 Saab Scania Ab Arrangemang vid en magnetisk legesgivare
US4608620A (en) * 1985-11-14 1986-08-26 Westinghouse Electric Corp. Magnetic sensor for armature and stator
DE3730523A1 (de) * 1987-09-11 1989-03-30 Bosch Gmbh Robert Verfahren und einrichtung zur detektion der schaltzeiten von magnetventilen
DE3910810A1 (de) * 1989-04-04 1990-10-11 Luetze Gmbh Co F Schaltungsanordnung fuer ein elektromagnetisches ventil
DE4142996A1 (de) * 1991-12-24 1993-07-01 Bosch Gmbh Robert Verfahren zum messen der mechanischen bewegung eines magnetventilankers, insbesondere von elektrisch gesteuerten einspritzanlagen
DE4310819A1 (de) * 1993-04-02 1994-10-06 Bosch Gmbh Robert Verfahren zur Einstellung eines Ventils
DE4438059C2 (de) * 1993-11-05 2002-06-06 Volkswagen Ag Einrichtung zur meßtechnischen Erfassung von Ventil-Hubbewegungen
DE19516513A1 (de) * 1995-05-05 1996-11-07 Bosch Gmbh Robert Verfahren zur Einstellung eines Ventils und Ventil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605216A1 (de) * 1986-02-19 1987-08-20 Bosch Gmbh Robert Tauchanker-elektromagnet
JPH03150809A (ja) * 1989-11-07 1991-06-27 Ckd Corp 電磁ソレノイド動作状態検出装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 379 (E - 1115) 25 September 1991 (1991-09-25) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9428164B2 (en) 2013-02-28 2016-08-30 Bendix Commercial Vehicle Systems Llc Valve assembly

Also Published As

Publication number Publication date
DE19736773A1 (de) 1999-02-25

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