EP2820664A1 - Actionneur electromagnetique a grande force de deverrouillage - Google Patents
Actionneur electromagnetique a grande force de deverrouillageInfo
- Publication number
- EP2820664A1 EP2820664A1 EP13712868.2A EP13712868A EP2820664A1 EP 2820664 A1 EP2820664 A1 EP 2820664A1 EP 13712868 A EP13712868 A EP 13712868A EP 2820664 A1 EP2820664 A1 EP 2820664A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pallet
- armature
- magnet
- distance
- leg
- 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.)
- Granted
Links
- 230000006698 induction Effects 0.000 claims description 3
- 230000010287 polarization Effects 0.000 claims 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 8
- 230000005347 demagnetization Effects 0.000 description 2
- 229910000828 alnico Inorganic materials 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/18—Movable parts of magnetic circuits, e.g. armature
- H01H50/24—Parts rotatable or rockable outside coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/32—Electromagnetic mechanisms having permanently magnetised part
- H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
Definitions
- the present invention relates to an electromagnetic actuator of the differential relay type, capable of providing a sufficient unlocking force to trigger, for example, a differential switch lock. It relates more specifically to a high sensitivity actuator device, used in particular in the field of differential protection, when it is considered independently of the mains voltage.
- This type of electromagnetic actuator conventionally comprises:
- a fixed frame usually U-shaped, the ends of the two legs constitute two coplanar polar surfaces;
- a permanent magnet for biasing the magnetic circuit, arranged between the legs of the armature and creating a permanent magnetic force for attracting the pallet towards the polar surfaces, magnetic force acting against a restoring force of 'a spring ;
- an induction coil surrounding the magnetic circuit connected for example to a circuit to be controlled, in order to modify the initial equilibrium between the magnetic force and the restoring force of the spring.
- the torque transmitted to the pallet by the permanent magnet opposes the torque exerted by the spring on the pallet.
- the magnet further allows finer control of the fluxes in the magnetic circuit and renders the sensibility of the actuator higher.
- the flux created on this occasion in the magnetic circuit by the coil combines with the flux generated by the magnet, destroying the initial mechanical equilibrium. and rotating the pallet, attracted in contact with the pole end surfaces of the frame.
- the displacement of the pallet causes that of a mechanical member, for example a rod adapted to unlock the lock of a differential switch placed close to the electromagnetic actuator, such that said rod can act on a trigger.
- the objective of the present invention is thus to overcome the drawbacks of the solutions of the prior art, by proposing an electromagnetic actuator capable of providing a large unlocking force, which is simple in addition to implementation and whose design remains compact. .
- the aim is also not to increase the volume of the magnet, or those of the pallet and the frame, which is already undesirable from a clutter point of view, and obviously has implications on the operation and behavior of the magnetic circuit.
- the invention is characterized primarily in that the magnet is positioned in the vicinity of the jamb of the armature opposite the proximal leg of the pivot point of the pallet .
- the force generated by the magnet can remain identical to what was known, the attraction torque of the pallet towards the polar surfaces of the armature that it generates being substantially greater, because of the increase of the arm of lever between the magnet and the pivot point of the pallet.
- a setting of the electromagnetic trigger is always necessary, and it is done mainly by adjusting the induction of the magnet.
- the closer the magnet is to the pivot point the easier the adjustment is because only a small part of the flux of the magnet is used in the useful part of the electromagnetic circuit, that which includes the largest air gap in the electromagnetic circuit. opposite the pivot point of the pallet.
- the magnets used in this type of actuator are magnets considered easy to adjust and which have a magnetic properties drift compatible with that of the magnetic materials of the frame and pallet. They demagnetize however relatively easily, for example when the magnetic circuit changes.
- the positioning of the magnet with respect to the reinforcement results from a fine compromise which aims to maximize the attraction torque of the pallet towards the polar surfaces of the armature while avoiding a the saturation of the jamb of the armature opposite the point of pivoting, and secondly the demagnetization of the permanent magnet.
- the distance A between the magnet and the leg of the armature opposite the proximal leg of the pivot point of the pallet is provided less than half the distance D between the two legs of the armature.
- the distance A may be greater than the distance B between the magnet and the pallet in the closed position added to the distance C between the magnet and the base of the armature.
- the distance A is chosen greater than 0.3mm. According to other characteristics of the magnetic circuit of the invention and which allow optimal operation of the trigger, it should be noted that the polar surface of the magnet opposite the pallet is provided greater than 6 mm 2 .
- the pallet preferably covers:
- the opening angle of the pallet is limited, in practice between 0 ° and 15 °.
- FIG. 1 very schematically illustrates a possible configuration for a magnetic circuit according to the invention
- FIG. 2 represents an actuator whose magnetic circuit obeys the criteria of the invention.
- the magnetic circuit of a conventional actuator comprises a U-shaped fixed armature (1), a pallet (2) pivotally mounted along an axis (3) in the vicinity of the upper end of the rotor. a leg (4) of the armature (1), and which is in this case represented closed, that is to say that its free end is in contact with the upper end of the other leg (5).
- a permanent magnet (6) is placed in the immediate vicinity of the jamb (5), the distance A separating them having been artificially increased to improve the clarity of the figure, but being less important than the representation that is made in reality.
- D is the distance separating said legs (4, 5)
- A is the distance separating the permanent magnet (6) from the jamb (5)
- B and C are the distances separating the permanent magnet (6). ) respectively of the pallet (2) and the base (7) of the magnetic armature (1).
- FIG. 2 illustrates in more detail an exemplary electromagnetic actuator configuration according to the invention with, in a housing (10), the armature (1) and the pallet (2) connected to a pallet plate (1 1) which is rotatably mounted in the housing (3).
- This sheet (1 1) further comprises a tab (12) on which is fixed an end of a coil spring (13) whose other end is secured to a reinforcing sheet (14) extending along jamb (4).
- the pallet cooperates with a pusher (15) whose free end protrudes from the casing (10), and which is displaced by it between two positions corresponding to the two positions that can take the pallet (2), respectively in contact and at a distance from the armature (1), according to whether the coil (16) is traversed by a current or not.
- This coil (16) is mounted on a support (17) surrounding the base (7) of the frame (1), and for this purpose passing through a window (18) formed in the housing (10).
- the permanent magnet (6) is arranged in the immediate vicinity of the jamb (5), and its positioning obeys the length and distance conditions previously imposed.
- the pallet (2) is moved relative to the armature (1), it pivots in fact from its position in contact with the end of the leg (5) urged by the spring (13), causing the pusher (15) whose end cooperates with a trigger system, for example a circuit breaker (not shown).
- a trigger system for example a circuit breaker (not shown).
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnets (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13712868T PL2820664T3 (pl) | 2012-02-29 | 2013-02-28 | Elektromagnetyczny człon wykonawczy z dużą siłą odblokowującą |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1251866A FR2987493B1 (fr) | 2012-02-29 | 2012-02-29 | Actionneur electromagnetique a grande force de deverrouillage |
PCT/FR2013/050413 WO2013128125A1 (fr) | 2012-02-29 | 2013-02-28 | Actionneur electromagnetique a grande force de deverrouillage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2820664A1 true EP2820664A1 (fr) | 2015-01-07 |
EP2820664B1 EP2820664B1 (fr) | 2017-01-18 |
Family
ID=46754521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13712868.2A Active EP2820664B1 (fr) | 2012-02-29 | 2013-02-28 | Actionneur electromagnetique a grande force de deverrouillage |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP2820664B1 (fr) |
CN (1) | CN104246957B (fr) |
AU (1) | AU2013224790B2 (fr) |
ES (1) | ES2621667T3 (fr) |
FR (1) | FR2987493B1 (fr) |
IN (1) | IN2014MN01908A (fr) |
PL (1) | PL2820664T3 (fr) |
PT (1) | PT2820664T (fr) |
WO (1) | WO2013128125A1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2630256B1 (fr) * | 1988-04-14 | 1995-06-23 | Merlin Gerin | Declencheur electromagnetique a haute sensibilite |
AT414183B (de) * | 1994-06-08 | 2006-10-15 | Tyco Electronics Austria Gmbh | Bistabile schaltvorrichtung |
NL1004438C2 (nl) * | 1996-11-05 | 1998-05-08 | Holec Holland Nv | Stuurinrichting voor een elektrische schakelaar en een werkwijze voor het vervaardigen daarvan. |
KR100452659B1 (ko) * | 2000-03-28 | 2004-10-14 | 마츠시다 덴코 가부시키가이샤 | 전자기 구동 장치 및 전자기 릴레이 |
FR2846470B1 (fr) * | 2002-10-28 | 2005-03-04 | Schneider Electric Ind Sas | Dispositif de commutation electrique, relais et appareil electrique comportant un tel dispositif |
-
2012
- 2012-02-29 FR FR1251866A patent/FR2987493B1/fr active Active
-
2013
- 2013-02-28 IN IN1908MUN2014 patent/IN2014MN01908A/en unknown
- 2013-02-28 CN CN201380020167.8A patent/CN104246957B/zh active Active
- 2013-02-28 ES ES13712868.2T patent/ES2621667T3/es active Active
- 2013-02-28 WO PCT/FR2013/050413 patent/WO2013128125A1/fr active Application Filing
- 2013-02-28 PT PT137128682T patent/PT2820664T/pt unknown
- 2013-02-28 AU AU2013224790A patent/AU2013224790B2/en active Active
- 2013-02-28 EP EP13712868.2A patent/EP2820664B1/fr active Active
- 2013-02-28 PL PL13712868T patent/PL2820664T3/pl unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2013128125A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2987493A1 (fr) | 2013-08-30 |
PL2820664T3 (pl) | 2017-07-31 |
ES2621667T3 (es) | 2017-07-04 |
FR2987493B1 (fr) | 2014-03-21 |
IN2014MN01908A (fr) | 2015-07-10 |
PT2820664T (pt) | 2017-04-06 |
WO2013128125A1 (fr) | 2013-09-06 |
CN104246957B (zh) | 2018-01-02 |
AU2013224790A1 (en) | 2014-10-16 |
AU2013224790B2 (en) | 2016-07-07 |
EP2820664B1 (fr) | 2017-01-18 |
CN104246957A (zh) | 2014-12-24 |
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