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 PDFInfo
- 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- Withdrawn
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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.
Landscapes
- 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)
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)
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)
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)
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)
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 |
-
1997
- 1997-08-23 DE DE1997136773 patent/DE19736773A1/de not_active Withdrawn
-
1998
- 1998-03-21 EP EP98105164A patent/EP0899755A1/fr not_active Withdrawn
Patent Citations (2)
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)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 015, no. 379 (E - 1115) 25 September 1991 (1991-09-25) * |
Cited By (1)
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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Effective date: 19990904 |
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