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
  • H01F7/1638—Armatures not entering the winding
  • H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
  • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F5/00—Coils
  • H01F5/06—Insulation of windings
• • 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
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/28—Coils; Windings; Conductive connections
  • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
  • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
• • 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
  • H01F27/32—Insulating of coils, windings, or parts thereof
  • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
• • 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
  • H01F27/32—Insulating of coils, windings, or parts thereof
  • H01F27/327—Encapsulating or impregnating
• • 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
  • H01F27/40—Structural association with built-in electric component, e.g. fuse
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F3/00—Cores, Yokes, or armatures
  • H01F3/02—Cores, Yokes, or armatures made from sheets
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
  • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
  • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
  • H01F41/12—Insulating of windings
  • H01F41/127—Encapsulating or impregnating
• • 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
  • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
  • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets

Definitions

• -Electromagnetic actuator comprising a solenoid coil integral with a permanent magnet, and method of assembling such an actuator
• the invention relates to an electromagnetic actuator having an electromagnet whose coil is so ⁇ lidaire a permanent magnet, and a method of assembling such an actuator
• Electromagnetic actuators comprising a movable actuating member under the action of at least one electromagnet comprising a coil associated with a core arranged to channel a magnetic flux generated by the coil so that it closes in the actuating member, the coil comprising a coil of conductive wire covered with a casing and one electromagnet comprising at least one permanent magnet arranged relative to the core so that it can channel a flux generated by the permanent magnet so that it closes in the actuating member.
• the actuator assembly therefore requires mani ⁇ puler many independent elements, which complicates 1 assembly.
• the invention relates to an electromagnetic actuator whose assembly is simplified.
• an electromagnetic actuator of the aforementioned type in which the envelope of the coil includes at least a portion of the magnet per ⁇ manent so as to secure the permanent magnet the winding of conductive wire, so that the coil of conductive wire and the permanent magnet form a unitary unitary assembly adapted to be attached to the core.
• the invention also relates to a method of assembling an actuator comprising an actuating member and an electromagnet comprising a core, a coil comprising a winding of conductive wire and an additional element, which comprises the step of solidari ⁇ add the additional element to the coil prior to assembling the coil and core.
• the actuator of the invention comprises two electromagnets 1 arranged facing each other and each comprising a core 2 made of a stack of sheets made of ferromagnetic material. than.
• the upper electromagnet core appears only in the form of a silhouette in phantom.
• the electromagnets 1 are integrated in a casing 50 obtained by overmolding the cores 2.
• Each of the cores 2 comprises branches which are separated by recesses which form a housing in which a coil 3 extends.
• the sheets forming the cores 2 are cut to allow insertion into the core of perma ⁇ nent magnets 4.
• the magnets permanent 4 separate the sheets of the core 2 into three independent portions forming as many packages of sheets.
• the actuator further comprises a pusher 7 the the
• the pusher 7 has a free end protruding from the housing 50 and intended to cooperate with an element to be actuated, for example a distribution valve of a heat engine, while the other end of the pusher 7 is secured to a pallet 8 which extends between the electromagnets 1.
• the plate 8 is movable between two extreme positions in which the pallet 8 is in contact with one of the cores 2 of the electromagnets 1, under the effect of the electromagnets 1 which selectively attract the pa ⁇ lette and secondly of unrepresented springs which act on the pusher 7 to recall it to a position of equilibrium substantially halfway between extreme positions.
• Each of the coils 3 comprises an envelope 20 covering a winding of conductive wire 21.
• the envelope 20 protects the conductor wire 21 and prevents any electrical contact between the latter and the corresponding core 2.
• the casing 20 also makes it possible to improve the thermal continuity between the coil 3 and the corresponding core 2, by increasing the exchange surface between these two elements.
• the envelope 20 comprises protuberances 22 which extend to receive the extremities of the permanent magnets 4.
• the protuberances 22 so ⁇ lidarise the permanent magnets 4 to the coils so that the coil and the magnets form a unitary unitary assembly.
• a non-conductive material for example a polymer
• a non-ferromagnetic material for example aluminum
• the invention is not limited to the particular embodiments described above, but on the contrary encompasses any variant within the scope of the invention as defined by the claims.
• the illustrated actuator comprises two electromagnets
• the invention also applies to an actuator comprising only one electromagnet.
• the protuberances cover only a part of the permanent magnet (in this case, in the example illustrated, the end of the magnets)
• the envelope may include the totality of the additional element.
• the permanent magnet may be secured by means other than a protrusion, for example by a boss of the envelope.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=34945919

Family Applications (1)

Country Status (5)

Families Citing this family (5)

Family Cites Families (9)

• 2004
  • 2004-05-24 FR FR0405569A patent/FR2870631B1/fr not_active Expired - Fee Related
• 2005
  • 2005-05-23 WO PCT/FR2005/001273 patent/WO2006000674A1/fr active Application Filing
  • 2005-05-23 US US11/596,946 patent/US20080079521A1/en not_active Abandoned
  • 2005-05-23 EP EP05773211A patent/EP1749304A1/de not_active Withdrawn
  • 2005-05-23 JP JP2007514003A patent/JP2008500713A/ja active Pending

Non-Patent Citations (1)

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