EP3198624B1 - Actionneur électromagnétique et contacteur électrique comprenant un tel actionneur - Google Patents

Actionneur électromagnétique et contacteur électrique comprenant un tel actionneur Download PDF

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Publication number
EP3198624B1
EP3198624B1 EP15766858.3A EP15766858A EP3198624B1 EP 3198624 B1 EP3198624 B1 EP 3198624B1 EP 15766858 A EP15766858 A EP 15766858A EP 3198624 B1 EP3198624 B1 EP 3198624B1
Authority
EP
European Patent Office
Prior art keywords
rib
actuator
blade
active surface
core
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.)
Active
Application number
EP15766858.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3198624A1 (fr
Inventor
Patrick Larcher
Vincent GEFFROY
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP3198624A1 publication Critical patent/EP3198624A1/fr
Application granted granted Critical
Publication of EP3198624B1 publication Critical patent/EP3198624B1/fr
Active 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
    • H01F7/1638—Armatures not entering the winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H50/40—Branched or multiple-limb main magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2209—Polarised relays with rectilinearly movable armature
    • 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
    • H01F2007/1692—Electromagnets or actuators with two coils
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/14—Terminal arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/163—Details concerning air-gaps, e.g. anti-remanence, damping, anti-corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity

Definitions

  • the present invention relates to an electromagnetic actuator for operating an electric contactor, as well as an electric contactor comprising such an actuator.
  • the invention intends to remedy more particularly by proposing a new electromagnetic actuator in which the maneuver of the mobile pallet is improved, without substantial modification of the size of the actuator.
  • the invention relates to an electromagnetic actuator according to claim 1.
  • the ribs reduce the average gap distance between the expansion plate and the movable pallet, which allows effective control of the position of the pallet, with an increase in the magnetic field generated by the coil. constant power.
  • the geometry of the ribs makes it possible to reduce the moving mass and, consequently, to increase the magnetic force at equivalent power and to reduce the intensity of the magnetic force required to maneuver the pallet.
  • the invention also makes it possible to increase the stored electromagnetic energy before the impact of these pads. Because of the reduced air gap, the magnetic circuit is generally closed between the expansion plate and the movable pallet, which induces an increase in the electromagnetic force.
  • the invention also relates to an electric contactor comprising fixed pellets and movable pellets driven by a pallet belonging to an actuator, characterized in that the actuator is as mentioned above.
  • the actuator 2 comprises a fixed part 4 and a pallet 6, movable relative to the part 4 in translation along the longitudinal axis X 2 of the actuator 2.
  • the fixed part 4 comprises a base plate 42, two identical coils 44A and 44B, two identical cores 46A and 46B and an air gap 48.
  • the base plate 42 comprises two identical orifices 422A and 422B each centered on an axis X2A or X2B parallel to the longitudinal axis X2.
  • the coils and cores being identical, only the coil 44A and the core 46A are described in detail.
  • the coil 44A defines a housing 442 around which is wound a coil 444 disposed between two terminal plates 446.
  • the housing 442 of the coil 44A is centered on the axis X2A, while the housing 442 of the coil 44B is centered on the X2B axis.
  • the core 46A comprises a foot 462 sized to pass through the housing 442 of the coil 44A and engage in the hole 422A of the base plate 42.
  • the foot 462 of each core 46A or 46B is extended by a blooming plate 464 which defines a surface S464 perpendicular to the longitudinal axis X2A.
  • the blooming plate 464 is rectangular. 466 is an edge of the plate 464.
  • the edge 466 of the expansion plate 464 the core 46A is opposed to the expansion plate 464 of the core 46B.
  • the edge 466 of the expansion plate 464 of the core 46B is opposed to the expansion plate 464 of the core 46A.
  • the edge 466 of the core 46A is the upper edge of its expansion plate 464, while the edge 466 of the core 46B is the lower edge.
  • a rib 468 projecting from the surface S464 towards the pallet 6.
  • the rib 468 is provided with two reinforcements 4682 whose function is to position the cores 46A and 46B within the actuator 2.
  • a spring 8A is disposed between the surface S464 of the core 46A and the pallet 6.
  • a spring 8B is disposed between the surface S464 of the core 46B and the pallet 6.
  • the air gap plate 48 is pierced with two orifices 482A and 482B passages of the springs 8A and 8B.
  • the movable pallet 6 moves in translation parallel to the longitudinal axis X2, between a first position P0, remote from the air gap plate 48 and the expansion plates 464, this position being represented in FIGS. Figures 5 to 7 , and a second position P1, close to the active surface S464 and resting between the air gap plate 48. In this other position, the movable pallet 6 is positioned between the ribs 468. Note C the stroke of the movable pallet 6 between these two positions P0 and P1.
  • L6 is the length of the pallet 6, measured perpendicularly to the longitudinal axis X2 and parallel to a plane containing the axes X2A and X2B.
  • e6 the thickness of the pallet 6, measured parallel to the axis X2.
  • D468 is the distance between the ribs 468 of the cores 46A and 46B, measured perpendicularly to the longitudinal axis X2 and parallel to a plane comprising the axis X2A and the axis X2B.
  • the length L6 is less than the distance d468, which allows the pallet 6 to engage between the ribs 468 of the cores 46A and 46B in approaching the surfaces S464. Thus, the pallet 6 can slide along each rib 468 along the axis X2.
  • L48 the length of the gap plate 48, measured parallel to the length L6.
  • the length L48 is less than the distance d468, which makes it possible to place the air gap plate 48 on the surfaces S464, between the ribs 468 of the cores 46A and 46B.
  • H468 is the height of a rib 468 measured from the surface S464 parallel to the axis X2 outside the reinforcements 4682.
  • the ratio between the height H468 and the thickness e6 is between 0.1 and 1.0 preferably between 0.2 and 0.9.
  • the ratio between the height H468 and the stroke C of the pallet 6 is between 0.1 and 1.5, preferably between 0.2 and 0.9.
  • I468 denotes the width of the rib 468, measured parallel to the active surface S464 and perpendicular to the adjacent edge 466, outside the reinforcements 4682.
  • the ratio between the width I468 and the stroke C of the pallet 6 is between 0.1 and 1.2, preferably between 0.2 and 0.7.
  • the width of the rib is a compromise between its induction level, the gain of effort and the gain of the mass of the pallet.
  • the height H468 is between 1 and 5 mm, and the width I468 is between 1 and 4 mm.
  • the cores 46A and 46B are monoblock, for example, made by metal sintering.
  • the expansion plate 464 and the rib 468 are monoblock and reported, for example by welding, on the foot 462.
  • the foot 462, the expansion plate 464 and the rib 468 of the cores 46A and 46B are made separately and assembled together, for example by welding.
  • the figure 3 shows magnetic field lines L m extending between the movable pallet 6 and the core 46A and 46B due to the magnetic field generated by the coils 44A and 44B. It will be noted in this figure that the magnetic field lines L m close again through the base plate 42 which thus constitutes a magnetic flux return element.
  • L mf of the field lines magnetic closure which extend, on the one hand, between the edge 62A and the rib 468 of the core 46A and, on the other hand, between the edge 62B and the rib 468 of the core 46B.
  • the closing magnetic field lines L mf pass through an air gap E which is substantially less thick than the air gap E 'that exists between the mobile pallet 6' and the expansion plates 464 'of an actuator according to the prior art shown in FIG. the figure 4 .
  • the ribs 468 make it possible to increase, in certain phases of use of the contactor 200, the intensity of the electromagnetic field between the pallet 6 and the cores 46A and 46B, compared to the prior art.
  • the magnetic field resulting from the low gap E allows effective control of the position of the movable pallet 6 along the axis X2.
  • the actuator 2 is integrated with an electric contactor 200.
  • the electric contactor 200 comprises a first fixed track 202 which extends from a blocking zone 204 of an electrical conductor and supports a fixed contact pad 206.
  • the contactor 200 also comprises a second fixed track 212 which extends between a connection zone 214 for an electrical conductor and a fixed contact pad 216.
  • the electric contactor 200 also comprises two movable contact pads 208 and 218 mounted on a bridge mobile 210.
  • This movable bridge 210 is loaded by a spring 220, parallel to the axis X2 and in the direction of the movable pallet 6.
  • a movable contact carrier 222 is interposed between the movable bridge 210 and the movable pallet 6.
  • Each of the Tracks 202 and 212 form a streamline.
  • the position P0 represents the first position, remote from the moving pallet 6 with respect to the surface S464.
  • the position P1 represents the second close position, where the movable pallet 6 bears against the air gap plate 48.
  • the position P2 represents an intermediate position where the movable pads 208 and 218 come into contact with the fixed pellets. 206 and 216 going from the position P0 to the position P1.
  • the distance between the positions P0 and P1 represents the stroke C.
  • the resistive mechanical force generated by the springs 8A and 8B increases linearly as shown on the part right of the curve C1.
  • the continued movement of the movable pallet 6 induces the separation of the movable contact holder 222 and the movable bridge 210, as well as the compression of the spring 220 whose stiffness constant is added to that of the springs 8A and 8B.
  • the curve C1 therefore has a greater slope from the P2 position between the P0 and P2 positions.
  • curve C2 represents the magnetic force exerted by the actuator according to the prior art
  • curve C3 represents the magnetic force exerted by an actuator according to the invention.
  • the ribs 468 the curve C3 is above the curve C2 between the positions P0 and P3.
  • the magnetic force is greater with the ribs 468 than without these ribs.
  • the curve C3 is below the curve C2.
  • the magnetic force used in the actuator 2 according to the invention is less than the magnetic force used in an actuator according to the invention. the prior art.
  • the addition of these ribs 468 makes it possible to generate an additional magnetic force where necessary between the positions P0 and P3, and to reduce it where it is not necessary, between the positions P3 and P1.
  • ribs 468 extend over the entire length of the edges 466, which allows them to participate in the closure of the field lines over the entire width 16 of the moving pallet 6.
  • a rib 468 may be interrupted along the length or extend only over part of the adjacent edge 466.
  • the invention is described above in the case of an actuator with two coils, two cores and two ribs. It is applicable to a single-coil actuator, in which case the geometry of the magnetic flux return element, which corresponds to the base plate 42 of the example of the figures, is adapted.
  • rib-like ribs 468 may be provided on three adjacent edges of a blooming plate 464 outside the nearest edge of the other blooming plate.
  • the invention can have a maximum of six ribs.
  • the embodiments and variants mentioned above may be combined to generate new embodiments of the invention.
EP15766858.3A 2014-09-24 2015-09-23 Actionneur électromagnétique et contacteur électrique comprenant un tel actionneur Active EP3198624B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1459007A FR3026222B1 (fr) 2014-09-24 2014-09-24 Actionneur electromagnetique et contacteur electrique comprenant un tel actionneur
PCT/EP2015/071821 WO2016046249A1 (fr) 2014-09-24 2015-09-23 Actionneur électromagnétique et contacteur électrique comprenant un tel actionneur

Publications (2)

Publication Number Publication Date
EP3198624A1 EP3198624A1 (fr) 2017-08-02
EP3198624B1 true EP3198624B1 (fr) 2019-10-30

Family

ID=52130398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15766858.3A Active EP3198624B1 (fr) 2014-09-24 2015-09-23 Actionneur électromagnétique et contacteur électrique comprenant un tel actionneur

Country Status (6)

Country Link
US (1) US10115536B2 (zh)
EP (1) EP3198624B1 (zh)
JP (1) JP2017536647A (zh)
CN (1) CN106716590B (zh)
FR (1) FR3026222B1 (zh)
WO (1) WO2016046249A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3054924B1 (fr) * 2016-08-04 2020-12-04 Schneider Electric Ind Sas Partie mobile d'un actionneur electromagnetique pour un contacteur electrique, actionneur comprenant une telle partie et contacteur
FR3087576B1 (fr) * 2018-10-22 2020-11-13 Schneider Electric Ind Sas Appareil de coupure d'un courant electrique

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Also Published As

Publication number Publication date
EP3198624A1 (fr) 2017-08-02
FR3026222A1 (fr) 2016-03-25
JP2017536647A (ja) 2017-12-07
US20170271095A1 (en) 2017-09-21
CN106716590A (zh) 2017-05-24
WO2016046249A1 (fr) 2016-03-31
CN106716590B (zh) 2020-05-15
FR3026222B1 (fr) 2017-06-23
US10115536B2 (en) 2018-10-30

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