Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
  • F16K31/0679—Electromagnet aspects, e.g. electric supply therefor with more than one energising coil
• • 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
  • H01F7/081—Magnetic constructions
• • 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
  • H01F7/1638—Armatures not entering the winding

Definitions

• the invention relates to an electromagnetic drive device, in particular for a valve, with an electromagnet which has a magnetizable core which has a plurality of legs and an energizable coil arrangement surrounding at least one leg of the core, and with a coil which can be moved relative to the core by changing the coil current , magnetizable anchor.
• Such an electromagnetic drive device can be seen, for example, from GB 22 89 572 A, the core and the armature forming a so-called EI arrangement and the coil arrangement formed by a coil surrounding the middle leg of the E-shaped core.
• the object of the invention is to provide an electromagnetic drive device which enables faster switching times with a simple structure.
• Core has at least one U-arrangement and is preferably formed as a U-core or also as an E-core and essentially of a plurality of sheet metal elements abutting one another transversely to the direction of the parallel legs, the parallel legs being surrounded by a coil of the coil arrangement.
• the total resistance of the coil arrangement can be varied.
• the sheet metal elements forming the core have a U-shaped or E-shaped shape. This enables the core to be easily manufactured by superimposing the individual sheet metal elements.
• the cross section of the core and / or the armature is contoured polygonally, in particular rectangularly.
• the sheet metal elements used are identical, so that the core can be manufactured inexpensively.
• the cross section of the core and / or the armature can be oval or circular in contour.
• the circular cross-sectional shape of the core allows the shape to be adapted to the coils, which are often wound in the shape of a circular cylinder.
• the core and / or the armature consist of soft magnetic material. This measure ensures a low coercive field strength.
• This soft magnetic material can be ferromagnetic or ferromagnetic material.
• Ferromagnetic material has a high specific resistance.
• iron can be used as the ferromagnetic material.
• the coils each have one have non-magnetizable winding supports on which the winding is applied. In this way, a gap filled by the winding carrier is created between the coil windings and the respectively assigned leg of the core.
• the winding support can be made of plastic material, which makes it extremely cost-effective to manufacture.
• Fig. 1 shows a valve in a partially sectioned side view, which has an embodiment of an electromagnetic drive device
• Fig. 2 shows an embodiment of a laminated U-shaped core in a front view of the end faces of the two U-legs.
• a 3/2-way valve 5 which has an embodiment of an electromagnetic drive device 6.
• the valve has a valve slide 9 which can be moved back and forth in the slide direction 7 in the longitudinal direction 8 between two switching positions.
• a valve slide 9 which can be moved back and forth in the slide direction 7 in the longitudinal direction 8 between two switching positions.
• the slide holder 7 open three externally accessible fluid channels 10, 11 and 12, depending on the switching position of the valve slide 9 either the two fluid channels 10 and 11 or the Fluidkan le 10 and 12 are fluidly connected to each other.
• the valve has the electromagnetic drive device 6. With the help of the drive device 6, the valve slide can be moved back and forth between the two switching positions.
• the drive device 6 has an armature 15 made of magnetizable material, which is motionally coupled to the valve slide 9 and, according to the example, is firmly connected to it. 1, the armature 15 is fastened to the end region of the valve slide 9 assigned to the interior of the valve 5.
• the armature 15 has a cuboid shape and extends transversely to the valve spool 9 in such a way that its two end sections 17, 18 project away from the valve spool 9 on diametrically opposite sides thereof.
• the two end sections 17, 18 are of substantially the same length.
• the cross section of the armature could also be varied as desired, for example it could be oval or circular or have a different polygon shape.
• the electromagnetic drive device 6 further contains an electromagnet 21, with the aid of which a movement of the armature 15 is brought about and thus the switching of the valve slide from one to the other switching position can be brought about.
• the electromagnet 21 has a U-shaped core 22 made of magnetizable material. In the preferred embodiment, it has a rectangular cross section.
• the cross section of the core 22 could also be selected to be oval or circular or to have a different polygon shape.
• both the core 22 and the armature 25 consist of soft magnetic material. In principle, this would come into consideration ferrimagnetic or ferromagnetic material, in the present case ferromagnetic material, eg. B. iron, is used.
• the U-shaped core 22 is laminated. It therefore does not consist of solid material, but is made up of several, which lie against one another transversely to the direction of the two U-legs 23, 24, that is to say transversely to the longitudinal direction 8
• Sheet metal elements 30 constructed.
• the individual sheet metal elements 30 likewise have a U-shaped shape, so that their contour corresponds to that of the core 22 in a side view. Because of the rectangular cross section of the core 22 selected here, it can therefore be formed, so to speak, by layering a plurality of U-shaped sheet metal elements 30. One could therefore also say that the core 22 has a layer or lamella structure.
• the sheet metal elements 30 are insulated from one another, so that the eddy current losses can be kept very low, in particular when the electromagnet 21 is switched on and off at a high frequency.
• the insulation of the sheet metal elements 30 can, for example, by applying a thin, non-conductive lacquer layer or the like. done on the sheet metal elements 30.
• the electromagnet 21 has a current-carrying coil arrangement 35 formed by two electrical coils 33, 34.
• the coil arrangement 35 is arranged such that the two U-legs 23, 24 are each surrounded by a coil 33 and 34, respectively.
• the two coils 33, 34 are cylindrical coils with, for example, a rectangular through opening for receiving the U-legs 23 and 24, the cylinder axis of which coincides with the direction of travel of the respectively associated U-legs 23 and 24.
• the two coils 33, 34 each have a winding 36 or 37, which is applied to a respectively associated hollow-cylindrical winding carrier 38 or 39.
• the inner contour of the winding carriers 38, 39 is adapted to the cross section of the U-legs 23, 24, so that the winding carriers 38, 39 can be plugged onto the respectively assigned U-legs 23, 24 from the free end 25 or 26 thereof.
• the winding carriers 38, 39 consist of non-magnetizable material, for example plastic, and therefore form a circumferential space between the windings 36, 37 and the respectively associated U-leg 23 or 24.
• the winding carriers 38, 39 each have an annular flange 41, 42, so that the winding carriers 38, 39 also limit the respectively associated winding 36 and 37 from the two axial sides.
• the two electrical coils 33, 34 of the coil arrangement 35 of the electromagnet 21 can either be connected in parallel or in series.
• the coils 33, 34 are in the installed state of the drive device 6 in the valve 5 electrically connected to two externally accessible electrical contacts 43, 44, via which the coils 33, 34 can be energized.
• the armature 15 is pretensioned by means of a pretensioning device, not shown, which can be formed, for example, by a spring arrangement, into the switching position in which it is at a greater distance from the electromagnet 21 or from the two free ends 25, 26 of the U-legs 23 or 24. This switching position is shown in Fig. 1.
• the magnetic field generated by the two coils 33, 34 collapses, and the armature 15 is moved away from the core 22 by the biasing device into the other switching position.
• the electromagnetic drive device 6 is able to perform the switching operations just described very quickly, so that high switching frequencies can be achieved.
• the armature 15 as a permanent magnet, so that the switching movement of the armature 15 can be carried out by the electromagnet 21 in both directions.
• the current direction of the coil current is selected accordingly, so that in one case there is an attraction between the electromagnet 21 and the armature 15 and, when the current direction is reversed, repulsion between the electromagnet 21 and the armature 15 is effected.
• the armature 15 and the valve slide 9 connected to it can be moved into the two switching positions.
• the armature 15 When de-energized, the armature 15 always remains in the state of detention.
• a bistable version is also possible.
• the electromagnetic drive device 6 can also be used in other applications than in the case of a valve 5 in which a driven part is to be moved back and forth linearly between two positions by means of the armature 15.
• the core 22 can also have a plurality of U arrangements arranged next to one another instead of a single U arrangement (U core).
• U core U arrangement

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Magnetically Actuated Valves (AREA)
• Electromagnets (AREA)

Applications Claiming Priority (3)

Publications (1)

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Family Applications (1)

Country Status (5)

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Family Cites Families (18)

• 1999
  • 1999-03-31 DE DE29905883U patent/DE29905883U1/de not_active Expired - Lifetime
• 2000
  • 2000-03-18 JP JP2000609724A patent/JP2002541402A/ja active Pending
  • 2000-03-18 EP EP00918813A patent/EP1082568A1/de not_active Ceased
  • 2000-03-18 US US09/674,976 patent/US6496092B1/en not_active Expired - Fee Related
  • 2000-03-18 WO PCT/EP2000/002430 patent/WO2000060261A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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